Updated on 2024/03/30

写真a

 
NISHIMOTO,Akio
 
Organization
Faculty of Chemistry, Materials and Bioengineering Professor
Title
Professor
Contact information
メールアドレス
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Degree

  • Doctor of Philosophy in Engineering ( 2000.11 )

Research Interests

  • friction bonding

  • plasma nitriding

  • rotating electrode process

  • diffuion coating

  • active screen plasma nitriding

  • pulsed electric-current bonding;diffusion bonding;friction bonding

  • multi-layered roll-bonding

  • pulse electric current sintering

  • pulsed electric-current bonding

  • carburizing

  • diffusion bonding

  • plasma nitriding;active screen plasma nitriding;diffuion coating;carburizing

  • pulse electric current sintering;multi-layered roll-bonding;rotating electrode process

Research Areas

  • Nanotechnology/Materials / Metallic material properties

  • Nanotechnology/Materials / Material processing and microstructure control

Education

  • Osaka University   Graduate School, Division of Engineering   Department of Welding and Production Engineering

    2000

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  • Kansai University   Faculty of Engineering   Department of Materials Scinece and Engineering

    - 1994

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    Country: Japan

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Research History

  • Associate ProfessorFaculty of Chemistry, Materials and Bioengineering, Kansai University

    2007.4 - 2014.3

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  • LecturerFaculty of Engineering, Kansai University

    2004.4 - 2007.3

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  • Research AssociateFaculty of Engineering, Kansai University

    2000.4 - 2004.3

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Professional Memberships

Committee Memberships

  •   日本熱処理技術協会 理事  

    2019   

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  •   日本熱処理技術協会 西部支部支部委員  

    2017   

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  •   日本熱処理技術協会 学術研究委員会  

    2013   

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  •   日本金属学会 本部評議員  

    2012   

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  •   日本熱処理技術協会 国際委員会委員  

    2011 - 2012   

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  •   日本金属学会 関西支部評議員  

    2011   

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  •   日本熱処理技術協会 将来問題検討委員会委員  

    2009 - 2010   

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  •   日本熱処理技術協会 西部支部常任幹事  

    2009   

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  •   日本熱処理技術協会 評議員  

    2007 - 2008   

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  •   日本熱処理技術協会 西部支部幹事  

    2004   

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Papers

  • CH4とSi(CH3)4による原料ガス組成を変化させたSi-DLCの特性 Reviewed

    澤田 将哉, 嵯峨山 諒, 西本 明生

    熱処理   Vol.63 ( No.4 )   199 - 204   2023.8

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.14940/netsushori.63.199

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  • Prediction of Carbon Concentration in Steel by Ultra Rapid Carburizing Above Eutectic Temperature Reviewed

    Ryosuke YAMAMOTO, Akio NISHIMOTO

    J. Japan Inst. Met. Mater.   Vol.87 No.5, 179-185.   2023.5

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    https://doi.org/10.2320/jinstmet.J2022046

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  • Plasma Nitriding Properties of Sintered Body Formed Using CoCrFeMnNi High-Entropy Alloy Powder by Varying Ball-Milling Duration Reviewed

    Jiaxin Peng, Akio Nishimoto

    BHM Berg- und Hüttenmännische Monatshefte   Vol.168 No.3, 130-136.   2023.3

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    https://doi.org/10.1007/s00501-023-01326-7

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  • Thickening of S-Phase and Sα-Phase of Various Stainless Steels Treated by Low Temperature Plasma Nitriding Using Screen Reviewed

    Shun Hamashima, Akio Nishimoto

    Materials Transactions   Vol.63, No.8, p.1170-1178.   2022.8

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    https://doi.org/10.2320/matertrans.MT-M2022062

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  • Mechanical Properties of Various Multilayer DLC Films Deposited on Austenitic Stainless Steel Reviewed

    Yukio Kobayashi, Akio Nishimoto

    J. Jpn. Soc. Heat Treatment   Vol.62 No.3, p.102-107.   2022.6

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    https://doi.org/10.14940/netsushori.62.102

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  • 共晶温度以上における超高速浸炭を用いた炭素侵入特性に対する処理温度の影響 Reviewed

    山本 亮介, 西本 明生

    熱処理   Vol.62 No.3, p.95-101.   2022.6

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    https://doi.org/10.14940/netsushori.62.95

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  • Effects of Nickel Screen on Active Screen Plasma Nitriding Reviewed

    Shun Hamashima, Akio Nishimoto

    Materials Transactions   Vol.63 No.6, p.939-947   2022.6

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    https://doi.org/10.2320/matertrans.MT-M2021241

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  • Improvement of surface properties of aluminum alloy-based composites by multi-layer DLC coating Reviewed

    Nobuyuki FUYAMA, Koki OKADA, Takashi NAGAOKA, Akio NISHIMOTO

    J. Jpn. Inst. Light Metals   Vol.72 No.5, 265-270.   2022.5

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    https://doi.org/10.2464/jilm.72.265

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  • Investigation of the Effect of Hydrogen Gas as Raw Material for DLC Film Preparation Reviewed

    OKADA, Koki, NISHIMOTO, Akio

    Materials Transactions   Vol.63, No.3, p.351-356.   2022.3

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    https://doi.org/10.2320/matertrans.MT-M2021213

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  • Boronizing of CoCrFeMnNi High-Entropy Alloys Using Spark Plasma Sintering Reviewed

    Hiroaki NAKAJO, Akio NISHIMOTO

    Journal of Manufacturing and Materials Processing   Vol.6 No.2, 29.   2022.2

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    https:// doi.org/10.3390/jmmp6020029

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  • Duplex Treatment of Active Screen Plasma Nitriding and Amorphous Hydrogenated Carbon Reviewed

    Akio Nishimoto, Rei Amano, Takazumi Tamiya

    Applied Surface Science Advances   Vol.6, 100129   2021.12

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    https://doi.org/10.1016/j.apsadv.2021.100129

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  • Effect of heat treatment atmosphere on carbon flux in ultra-rapid carburizing Reviewed

    Ryosuke YAMAMOTO, Akio NISHIMOTO, Kazutoshi TODA

    J. Jpn. Soc. Heat Treat.   Vol.61, No.4, p.183-190.   2021.8

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    https://doi.org/10.14940/netsushori.61.183

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  • Producing CrFeCoNiSi-Based High Entropy Alloy by Spark Plasma Sintering Reviewed

    Hiroaki Nakajo, Akio Nishimoto

    Materials Transactions   Vol.62, No.8, p.1231-1238.   2021.8

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    https://doi.org/10.2320/matertrans.MT-M2020387

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  • Effect of Screen Open Hole on Nitriding Behavior, Corrosion Resistance and Wear Resistance of Plasma Nitrided Low Carbon Steel Using Ti Screen Reviewed

    Kodai IMAMURA, Akio NISHIMOTO

    J. Japan Inst. Met. Mater.   Vol.85, No.3, 95-102.   2021.3

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  • Pulsed-Electric-Current Bonding of Oxygen-Free Copper and Austenitic Stainless Steel Reviewed

    Hayato Nakao, Akio Nishimoto

    Materials Transactions   Vol.62 No.3, 448-452.   2021.3

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  • Application of Active-Screen Plasma Nitriding to an Austenitic Stainless Steel Small-Diameter Thin Pipe Reviewed

    Kenzo SUMIYA, Shinkichi TOKUYAMA, Akio NISHIMOTO, Junichi FUKUI, Atsushi NISHIYAMA

    Metals   Vol. 11, No. 2, 366.   2021.2

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  • Comparative Investigation of the Mechanical and Wear Properties of Multilayer Si-DLC/DLC Films Reviewed

    Yukio Kobayashi, Akio Nishimoto

    Materials Transactions   Vol.62 No.2, p.271-277   2021.2

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    https://doi.org/10.2320/jinstmet.J2020060

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  • Boronizing of AISI 316L Stainless Steel Using Spark Plasma Sintering Technique Reviewed

    Akio Nishimoto, Tatsuki Kubo

    Defect and Diffusion Forum   Vol.405, p.3-10   2020.11

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    https://doi.org/10.4028/www.scientific.net/DDF.405.3

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  • Plasma-Nitriding Properties of CoCrFeMnNi High-Entropy Alloys Produced by Spark Plasma Sintering Reviewed

    Takato Karimoto, Akio Nishimoto

    METALS   10 ( 6 )   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI  

    High-entropy alloys (HEAs) were fabricated by powder metallurgy using gas-atomized powder and spark plasma sintering (SPS) followed by surface modification (plasma nitriding) of the sintered sample. Plasma nitriding forms nitride and induces solid-soluting of N; it enables the diffusion of N atoms by removing the passive film formed on the surface of alloys such as stainless steel, Al alloys, and Ti alloys, via the sputtering of cations during glow discharge. Therefore, plasma nitriding has the potential to process HEAs that contain strong oxidizing elements such as Cr, Al, and Ti. In this work, a sintered CoCrFeMnNi HEA was plasma-nitrided and its properties were subsequently evaluated. A uniform microstructure without segregation was obtained in the SPS sample, and its hardness and wear resistance were found to have improved. Analysis of the sample surface after nitriding revealed that an expanded face-centered cubic phase formed on the surface plasma-nitrided at 673 K and that a CrN phase formed on the surface plasma-nitrided at temperatures greater than 723 K. The surface hardness of the plasma-nitrided sample was 1200 HV or greater, and the wear resistance and pitting corrosion resistance were improved compared with those of the untreated sample.

    DOI: 10.3390/met10060761

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  • Nitriding and DLC Coating of Aluminum Alloy Using High-Current Pressure-Gradient-Type Plasma Source Reviewed

    Akio NISHIMOTO, Eiji FURUYA, Kenji KOUSAKA

    Int. J. Metall. Metal Phys.   Vol. 5, 048   2020.3

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    http://doi.org/10.35840/2631-5076/9248

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  • Surface-Modified Layer Formed by Plasma Nitriding Using Chromium Screen Reviewed

    Naoya Toshioka, Akio Nishimoto

    MATERIALS TRANSACTIONS   61 ( 6 )   1115 - 1121   2020

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:JAPAN INST METALS & MATERIALS  

    Low carbon steel sample S15C was nitrided by active screen plasma nitriding (ASPN) and direct current plasma nitriding with screen (S-DCPN) using a chromium screen to form simultaneously chromium nitride coating/nitrogen-diffusion layer on the sample surface. The sample was placed on the sample stage in a floating potential and a cathodic potential. A chromium screen was mounted on the cathodic stage parallel to the top of the sample. Plasma nitriding treatments in a floating potential (ASPN) and a cathodic potential (S-DCPN) were performed in a nitrogen-hydrogen atmosphere with 75% N-2-25% H-2 for 120 min at 773K and 873K under 200 Pa. After nitriding, the nitrided microstructure was examined with a scanning electron microscope, glow discharge optical emission spectroscopy and X-ray diffraction studies. In addition, the hardness and corrosion properties were also measured. The nitrided layer formed by S-DCPN consisted of a Cr-concentrated layer (similar to 750 HV) followed by a nitrogen-diffusion layer whereas that formed by ASPN consisted of deposited layer of chromium nitrides and iron nitrides without nitrogen-diffusion layer. Corrosion resistance of the samples treated by S-DCPN was better than that of untreated sample and sample treated by ASPN.

    DOI: 10.2320/matertrans.H-M2020815

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  • Microstructural, mechanical, and corrosion properties of plasma-nitrided CoCrFeMnNi high-entropy alloys Reviewed

    Akio Nishimoto, Takahiro Fukube, Toru Maruyama

    SURFACE & COATINGS TECHNOLOGY   376   52 - 58   2019.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE SA  

    Plasma nitriding is used for materials that are challenging to nitride by conventional techniques. Because of the sputtering effect of positive ions during glow discharge, protective oxide films on the surfaces of materials including stainless steels, aluminum alloys, and titanium alloys, can be effectively removed by ion and energetic particle bombardment; thus, nitrogen mass transfer from the plasma into the component subsurface can be achieved effectively. Plasma nitriding therefore has potential applicability to treat high-entropy alloys (HEAs) containing large amounts of strong oxide-forming elements such as chromium. In this study, the effects of plasma nitriding were investigated on the microstructural, mechanical, and corrosion properties of a CoCrFeMnNi HEA with an fcc structure that is soft and ductile. The HEA was produced by melting pure metals and casting. Direct-current plasma nitriding was then performed in a gas mixture of 25% N-2 and 75% H-2 for 54 ks at 673-823 K under 200 Pa with an auxiliary cathodic screen. After nitriding, the nitrided samples were examined using scanning electron microscopy, X-ray diffraction (XRD), Vickers microhardness testing, electron probe micro-analysis, and glow discharge optical emission spectroscopy (GD-OES). After nitriding, GD-OES revealed that the thickness of the nitriding layer tended to increase with increasing nitriding temperature. XRD analysis revealed that an fcc supersaturated solid solution phase was formed on surfaces nitrided below 723 K, whereas a CrN phase was formed on those nitrided above 723 K. The Vickers microhardness of the nitrided sample surfaces reached approximately 1300 HV. Ball-on-disk wear tests revealed that the wear loss of nitrided samples was considerably lower than that for untreated samples. Finally, the pitting corrosion resistance of samples nitrided at 673 K was higher than that of untreated samples.

    DOI: 10.1016/j.surfcoat.2018.06.088

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  • Dissimilar materials joining of A6061 Al alloy and AZ31 Mg alloy by Laser welding Reviewed

    Koki Matsumoto, Akio NISHIMOTO, Takeshi Ishikawa, Kimiaki Nagatsuka, Kazuhiro Ito, Masahiro Tsukamoto, Kazuhiro Nakata

    Journal of Light Metal Welding   Vol.57 No.5, p198-206   2019.5

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    https://doi.org/10.11283/jlwa.57.198

    DOI: 10.11283/jlwa.57.198

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  • Corrosion resistance in two-step plasma nitriding treatment from high temperature to low temperature Reviewed

    Naoya Toshioka, Syogo Hokamura, Akio NISHIMOTO

    Journal of Japan Society for Heat Treatment   Vol.59, p.1-2.   2019.2

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  • Simultaneous Boronizing and Carburizing of Titanium via Spark Plasma Sintering Reviewed

    Takato Karimoto, Akio Nishimoto

    MATERIALS TRANSACTIONS   60 ( 11 )   2387 - 2391   2019

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:JAPAN INST METALS & MATERIALS  

    This study focused on a diffusion coating method for the formation of a hard layer with excellent adhesion through the formation of an interlayer and a gradient layer on titanium materials. A limitation of conventional diffusion coating methods is the deterioration of the mechanical properties of the matrix resulting from the long-term, high-temperature processing. Therefore, spark plasma sintering (SPS) was used to form a ceramic layer, as it allows the suppression of the growth of crystal grains via rapid heating and enables low temperature and short processing time. The purpose of this study is to simultaneously form borides and carbides on a titanium surface using the SPS method and evaluate their properties. Commercially pure titanium (CP-Ti) was used as the substrate, and B4C powder was utilized as both the boronizing and carburizing source. An analysis of the sample surface subjected to SPS processing indicated the formation of TiC, TiB2, and TiB. As a ceramic layer was formed on the titanium surface, a surface hardness of similar to 1700HV was obtained, and the wear resistance was improved compared with that of untreated CP-Ti.

    DOI: 10.2320/matertrans.L-M2019838

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  • Effect of Number of Multilayer Repetitions and Thickness Ratio on Coating Properties of Si-DLC/DLC Multilayer Coatings on Aluminum Alloys Reviewed

    Hidenobu Maruno, Akio Nishimoto

    JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS   83 ( 3 )   82 - 86   2019

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:JAPAN INST METALS & MATERIALS  

    Aluminum alloys are light and have good workability; however, their low hardness and poor wear resistance are drawbacks limiting their wide application in the automotive industry. The deposition of diamond-like carbon (DLC) films, which exhibit high hardness and good wear resistance, onto the surface of Al alloy substrates, can overcome these drawbacks. As Al alloys and DLC films have low affinity for each other. adhesion between the two is poor; adhesion can be improved by using of an interlayer. For coatings with the same thickness, film properties are improved by forming multilayer structures. In this study, the sample was formed with a uniform film thickness of 2 mu m, to change the thickness ratio of the Si DLC/DLC layer to 1:1 or 1:3 and to change the number of multilayers [Si -DLC/DLC](N) to 1, 2, and 4. The samples were then tested by nanoindentation, Rockwell indentation, scratch, and wear tests. The sample with a thickness ratio of 1:1 increased the hardness and hardness/Young's modulus (H/E) of the film by increasing the number of multilayers repetitions. However, for the sample with a thickness ratio of 1:3. 2 and 4 multilayer repetitions did not effect a significant difference in the hardness and H/E ratio. These samples did not improve the adhesion properties, because of no significant difference by the Rockwell indentation and scratch tests. By the wear test, samples with a 1:1 thickness ratio of the multilayer increased the delamination length and decreased the friction coefficient with increasing number of multilayers repetitions. Samples with a 1:3 thickness ratio of the multilayer increased the delamination length with increasing number of multilayers repetitions, whereas samples with 2 and 4 multilayers did not cause a significant difference in the delamination length. Moreover. the friction coefficient of the samples decreased with increasing number of multilayers repetitions. This study showed the delamination length of DLC films is proportional to increasing H/F. ratio.

    DOI: 10.2320/jinstmet.J2018060

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  • Adhesion and durability of multi-interlayered diamond-like carbon films deposited on aluminum alloy Reviewed

    Hidenobu Maruno, Akio Nishimoto

    SURFACE & COATINGS TECHNOLOGY   354   134 - 144   2018.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE SA  

    Aluminum (Al) alloys are light and have good workability; however their low hardness and poor wear resistance are drawbacks limiting their wide application in the automotive industry. Deposition of diamond-like carbon (DLC) films, which exhibit high hardness and good wear resistance, onto the surface of Al alloy substrates can overcome these drawbacks. Because Al alloys and DLC films have low affinity for each other, adhesion between the two is poor. However, the use of an interlayer can improve adhesion. To investigate the effect of multiinterlayers on the adhesion and durability of DLC films on Al substrates, DLC films with Ti, Si-DLC, or Ti/Si-DLC interlayers were deposited onto A2024 substrates using plasma-enhanced chemical vapor deposition (PECVD). Prior to PECVD, an Ar-bombardment treatment was conducted to clean the surface of the substrate. Subsequently, a Ti interlayer was deposited by sputtering for 15 min, a Si-DLC interlayer was deposited using a tetramethylsilane (TMS) and methane gas mixture for 15 min, and DLC was deposited using methane gas for 90 min. The nanohardness of the Ti/Si-DLC multi-interlayered sample reached 33 GPa more than 8 GPa higher than that of the single-interlayered samples. In addition, the Ti/Si-DLC multi-interlayered sample exhibited higher hardness/Young's modulus (H/E) ratios than the single-interlayered samples. Wear tests showed that the wear volumes for the balls and the multi-interlayered samples were smaller than those for the single-interlayered samples. In addition, the delamination distance of the Ti/Si-DLC multi-interlayer sample was 3300 m, more than 1500 m longer than that of single-interlayered samples. This study demonstrates that improving the wear resistance required high plastic index parameter (H/E) values rather than high H values.

    DOI: 10.1016/j.surfcoat.2018.08.094

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  • Carbide layer coating on titanium by spark plasma sintering technique Reviewed

    Akio Nishimoto, Chihiro Nishi

    SURFACE & COATINGS TECHNOLOGY   353   324 - 328   2018.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE SA  

    Titanium materials are widely used in aerospace, automotive and biomaterial engineering fields due to high specific strength, superior fatigue and corrosion resistance as well as excellent biocompatibility. However, titanium exhibits low hardness and poor wear resistance. Therefore, the development of a suitable surface modification technology is necessary to expand the use of titanium materials. In order to improve hardness and wear resistance of materials, there is the method to form the hard ceramics layer on the matrix surface. In this study, carburizing method was applied. The carburizing method can form the carbide layer which is superior in adhesion with the matrix compared with PVD or CVD method. However, in conventional carburizing methods, the deterioration of the mechanical properties of the matrix as a result of long-term and high-temperature processing is problematic. Therefore, spark plasma sintering technique, which features short processing times, was applied to form a carbide layer in this study. The purpose of this research is to form a TiC layer on commercially pure Ti (CP-Ti) and evaluate its properties. CP-Ti was used as the substrate, and graphite powder was used as the carburizing source. XRD analyses indicated that a TiC layer was formed on the substrates. Corrosion tests indicated that the corrosion resistance of the carburized samples was remarkably improved compared to that of CP-Ti. Wear tests revealed that the carburized samples exhibited low friction coefficients and improved tribological properties.

    DOI: 10.1016/j.surfcoat.2018.08.092

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  • X-Ray Residual Stress in the S-Phase of Stainless Steel Nitrided by a Plasma Nitriding Method and Residual Stress Measurement of a DLC Film Deposited on the S-Phase Reviewed

    Y. Miki, A. Nishimoto, T. Tamiya

    Journal of the Society of Materials Science, Japan   Vol.65, p.517-524   2018.7

  • レーザ溶接によるAl合金とMg合金の異材接合

    松本 幸樹, 西本 明生, 永塚 公彬, 石川 武, 伊藤 和博, 塚本 雅裕, 中田 一博

    日本金属学会 2017年秋期(第161会)講演大会   2017.9

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    Language:Japanese   Publishing type:Research paper (other academic)  

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  • Surface modification of Cu-Ti alloy by active screen plasma nitriding Reviewed

    Akio Nishimoto, Yoshitaka Kizawa

    Journal of Japan Institute of Copper   Vol.56 No.1, p.237-240 ( 1 )   237 - 240   2017.8

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    Language:Japanese  

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  • プラズマ窒化処理したオーステナイト系ステンレス鋼表面のX線残留応力測定

    三木靖浩(奈良県産総センター), 足立茂寛(奈良県産総センター), 西本 明生

    金属   Vol.87 No.6, p.478-483 ( 6 )   478 - 483   2017.6

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    Language:Japanese   Publisher:アグネ技術センター  

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  • Active screen plasma nitriding of titanium alloy using titanium double screen

    Akio Nishimoto, Kunishige Nakazawa

    Materials Science Forum   891   11 - 17   2017

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Trans Tech Publications Ltd  

    The low hardness and poor tribological performance of titanium alloys restrict their wide applications in automotive fields. Nitriding is widely used to improve tribological properties, wear resistance, and corrosion resistance of steel and titanium alloys. Plasma nitriding is becoming increasingly popular because of its high nitrogen potential, short treatment time, and low environmental impact. Recently, considerable interest has been devoted to alternative nitriding methods such as active screen plasma nitriding (ASPN). In this study, a Ti-6Al-4V titanium alloy was nitrided by ASPN using a titanium double screen in order to investigate the effect of applying the double screen on the microstructure of the nitriding layer. The Ti-6Al-4V sample was placed on the sample stage in a cathodic potential. A titanium double screen was mounted on the cathodic stage around the sample stage. The sample was treated for 1-25 hours at 600ºC under 200 Pa in 75% N2 + 25% H2 atmosphere. After nitriding, glow discharge optical emission spectroscopy (GD-OES) revealed that the thickness of the nitriding layer composed of TiN tended to increase with increasing the nitriding time. The Vickers microhardness of the sample surface nitrided for 25 hours reached approximately 1300 HV0.01. Ball-on-disk wear test revealed that a wear loss of nitrided sample considerably decreased than that of untreated sample.

    DOI: 10.4028/www.scientific.net/MSF.891.11

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  • Deposition of TiO2 Film on Duplex Stainless Steel Substrate Using the Cathodic Cage Plasma Technique

    Romulo Ribeiro Magalhaes de Sousa, Francisco Odolberto de Araujo, Jose Alzamir Pereira da Costa, Akio Nishimoto, Bartolomeu Cruz Viana, Clodomiro Alves

    MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS   19 ( 5 )   1207 - 1212   2016.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:UNIV FED SAO CARLOS, DEPT ENGENHARIA MATERIALS  

    This research used the "cathodic cage (CC)" technique for TiO2 film deposition on duplex stainless steel substrate. This technique uses a multiple hollow cathode effect. Duplex stainless steel substrates were treated at temperatures of 300 degrees C, 350 degrees C and 400 degrees C, giving a temperature value ratio (T-s/T-m) of 0.27 to 0.31 (Ts being the substrate temperature and Tm the melting temperature of the deposited material). Treatment times of 1, 2 and 4 hours were administered and polycrystalline TiO2 films were obtained. The films were analyzed by optical microscopy (OM), X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM). During analysis, the formation of uniform films and the possibility of controlling the TiO2 phase were observed. It was also shown that with longer treatment times and higher temperatures the rutile phase predominates. For treatment times of 4 hours at all temperatures, the rutile structure was present. With treatment times of less than 4 hours, anatase was present. In addition, results showed that this simple, low cost technique can be an alternative method for depositions of TiO2 films, with the advantage of high levels of control over porosity, thickness and phase composition (anatase and rutile).

    DOI: 10.1590/1980-5373-MR-2015-0358

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  • X-ray residual stress in the S-phase of stainless steel nitrided by plasma nitriding method and residual stress measurement of DLC film deposited on the S-phase

    Yasuhiro Miki, Akio Nishimoto, Takazumi Tamiya

    Zairyo/Journal of the Society of Materials Science, Japan   65 ( 7 )   517 - 524   2016.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Society of Materials Science Japan  

    The S-phases (γN-phases) of SUS304 steel were prepared using direct current plasma nitriding (DCPN) and active screen plasma nitriding (ASPN). Furthermore, diamond-like carbon (DLC) films on these S-phases were prepared using plasma chemical vapor deposition (PCVD). The nitride layers included the γ'Fe4N phase. The Xray stress constant K of the nitride layers were evaluated using γN (200)+γ'Fe4N(200) diffraction with CrKa characteristic X-rays. The γN (200)+γ'Fe4N(200) diffraction angle 2θ of DCPN powder and ASPN powder were 73.49° and 72.98°, respectively. The X-ray stress constants of the γN (200)+γ'Fe4N(200) phase nitrided using DCPN and ASPN, E / (1+v ) , were 202 GPa and 153 GPa, respectively. The X-ray stress constant K of the γN (200)+γ'Fe4N(200) phase nitrided using DCPN and ASPN were -2,365 MPa/deg and -1,809 MPa/deg, respectively. The X-ray residual stress of these S-phases prepared using DCPN and ASPN were approximately -5.3 GPa and -2.6 GPa, respectively. On the other hand, Raman microprobe spectroscopy was used for residual stress measurements of the DLC films deposited on these S-phases. The Raman spectra of the DLC films were classified into the disorder (D') peak at 1,150 cm-1, D peak, and graphite (G) peak. The residual stresses in the DLC films on these S-phases as estimated from the Raman shift of the G peak for DCPN and ASPN were -3.2 GPa and -3.0 GPa, respectively. The hardness of the DLC films as determined using the nano-indentation method was very large. It is possible that increases in compressive residual stresses in the DLC films caused decreases in the contact areas and the indentation depth of the indenter, which appeared to cause increases in the Young's modulus and hardness of the DLC films.

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  • Effect of Surface Deposits on Nitriding Layer Formation of Active Screen Plasma Nitriding

    Akio Nishimoto, Takahiro Fukube, Toshiya Tanaka

    MATERIALS TRANSACTIONS   57 ( 10 )   1811 - 1815   2016

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    Austenitic stainless steel SUS 316L was nitrided by active-screen plasma nitriding (ASPN) to investigate the effect of surface deposits from the screen on the nitriding layer formation. ASPN experiments were carried out using a DC plasma-nitriding unit. The sample was placed on the sample stage in a floating potential (bias-off) and a cathodic potential (bias-on). The screen, which was SUS 316L expanded metal with 38% open area ratio, was mounted on the cathodic stage around the sample stage. Nitriding was performed in a nitrogen-hydrogen atmosphere with 25% N-2 + 75% H-2 for 18-180 ks at 673 K under 200 Pa by the ASPN process. After nitriding, the nitrided samples were examined using scanning electron microscopy, X-ray diffraction, Vickers microhardness and glow discharge optical emission spectroscopy. From the surface observation of the nitrided sample, deposits were observed on the top surface of the sample nitrided with bias-off whereas deposits were not on that nitrided with bias-on. The nitrogen-expanded austenite (S phase) was formed on the surface of both samples. Layer thickness of the S phase increased with increasing the nitriding time. Additionally, the degree of an increase of the layer thickness of the S phase nitrided with bias-on was approximately 2.5 times greater than that nitrided with bias-off. This result suggests that the ASPN treatment with bias-on is effective for the increase of the nitriding layer thickness.

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  • Effect of surface deposited layer on active screen plasma nitriding

    A. Nishimoto, T. Tanaka, T. Matsukawa

    Materials Performance and Characterization   5 ( 4 )   2016

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    The nitriding process is widely used to improve the tribological properties and wear resistance of metal surfaces. An "edge effect" occurs due to distortions of the electric field around the corners and edges of the components, although the components are well heated. This results in nonuniformity in properties such as the hardness and thickness of the surface layer. Recently, there has been considerable interest in active screen plasma nitriding (ASPN). In this process, the edge effect is completely eliminated because the plasma is produced on the cage and not directly on the samples, and sputtering of material from screen is important for ASPN. In this study, austenitic stainless steel AISI 316L and silicon (Si) were nitrided by ASPN to investigate the effect of surface deposits from the screen. ASPN experiments were carried out using a DC plasma-nitriding unit. The sample was placed on the sample stage in a floating potential and isolated from the cathodic screen and the anode. The screen, which was AISI 316L expanded metal with 38 % open area ratio, was mounted on the cathodic stage around the sample stage. ASPN was performed in 25 % N2+75 % H2 atmosphere for 7.2-90 ks at 673 K under 200 Pa. After nitriding, the nitrided samples were examined using scanning electron microscopy, X-ray diffraction, Vickers microhardness, and glow discharge optical emission spectroscopy. The nitrogen-expanded austenite (S phase) was formed on the surface of both samples. Additionally, γ′-Fe4N and CrN were also formed on the Si surface. The thickness of the surface deposited layer increased linearly with increasing nitriding time. That of the nitriding layer of S phase also increased, whereas the deviation from parabolic law was observed. This result suggested that the surface deposited layer suppressed the formation of a nitriding layer.

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  • Residual stress measurement in DLC films deposited by PBIID method using Raman microprobe spectroscopy

    Yasuhiro Miki, Akio Nishimoto, Takumi Sone, Yoshiji Araki

    SURFACE & COATINGS TECHNOLOGY   283   274 - 280   2015.12

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    Diamond-like carbon (DLC) films were prepared and their residual stresses were measured nondestructively using Raman microprobe spectroscopy. The plasma-based ion implantation and deposition (PBIID) method was used to coat the DLC films on thin glass substrates using acetylene, a mixture of acetylene and toluene, or only toluene gas at 1.0 Pa. Peaks in the Raman spectra of the DLC films were assigned as the D'(disordered) or C-C bonding peaks at 1150 cm(-1). The phonon deformation potentials (a') of the films were estimated from data for the phonon deformation potentials for pure graphite and diamond and calculated using the sp(3)/sp(2) bonding ratio and the hydrogen content of the films. Thus, a relation was observed between the Raman shift of the G peak (omega(G)) and the residual stress (sigma(c)) in each film. The Raman shifts (omega(0)) of the G peak for the films with no deformation were 1554, 1556, and 1562 cm(-1) for the films deposited using acetylene, a mixture gas and toluene gas. Moreover, only toluene had stress constants of -0.378, -0.384, and -0.391 GPa/cm(-1). The residual stresses constant in each film using (8.2 x 10(-4).a')(-1) omega(-1)(0) were estimated as -0.379, -0.384, and -0.391 GPa/cm(-1). The Raman shift of the D peak remained stationary as the compressive sigma(c) in the films increased but changed when the deposition gas was varied. The distance the D peak moved from 1420 cm(-1) corresponded to that of the G peak from 1560 cm(-1) in the Raman spectra of the films in the stress-free state. In addition, the compressive residual stress in the DLC film had a major impact on the hardness. (C) 2015 Elsevier B.V. All rights reserved.

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  • Correlation between Bound Water and Stability of Anodic Oxide Film on Aluminum

    Takumi Haruna, Takao Ikeda, Masato Miyazaki, Akio Nishimoto, Youhei Hirohata

    MATERIALS TRANSACTIONS   56 ( 12 )   2000 - 2005   2015.12

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    It has been investigated that the tiny amount of bound water in anodic oxide film on Al was quantitatively measured by thermal gas desorption spectroscopy (TDS) and correlation between the amount of bound water in the film and stability of the film was discussed. Al wire specimens were anodically polarized at 20.5 V in sulfuric acid solution to prepare the anodic oxide film on the specimen. The specimen with the film was then subjected to the film-modification process in which an anodic potential from 1.0 to 2.0 V-Ag/AgCl was applied to the specimen for 180 s in chloride solution. The specimens for which pitting corrosion did not occur were subjected to the four tests; measurements of thickness of barrier layer in the film, pitting potential, the amount of bound water in the film by the TDS and the amount of water in the porous layer by grow discharge optical emission spectroscopy (GD-OES). As a result, the thickness of the anodic oxide film formed on Al at 20.5 V was about 25 gm and independent of the modification potential. The amount of bound water was quantitatively detected by the TDS, and increased with a rise in the modification potential. However, depth profile of hydrogen, which is considered to correspond to water, in the porous layer of the film detected by the GD-OES was independent of the modification potential. The findings suggested that the bound water is included in the barrier layer. The pitting potential exhibited the maximum value when a modification potential of about 1.5 V-Ag/AgCl was applied to the specimen. According to the correlation between the amount of bound water in the film and the pitting potential, the pitting potential rose with an increase in the amount of bound water in smaller amount range, and the amount beyond the small range induces the pitting potential higher. The evidence suggests that control of the amount of bound water is key factor for improving stability of the anodic oxide film on Al.

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  • Correlation between amount of bound water and stability of passive film on Ti during passivation time in sulfuric acid solution

    Takumi Haruna, Suguru Ito, Keiichiro Kimoto, Akio Nishimoto

    JOURNAL OF SOLID STATE ELECTROCHEMISTRY   19 ( 12 )   3589 - 3593   2015.12

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    We have tried to detect the bound water in the passive film sensitively using thermal desorption gas spectroscopy (TDS) equipped with a quadrupole mass spectrometer and investigated the effect of bound water on stability of the passive film formed on Ti. Ti was electrochemically passivated in a dilute sulfuric acid solution for several periods. The passivated specimens were subjected to two methods for evaluating properties of the passive film: One was the TDS method to determine an amount of bound water in the film, and the other was a conventional electrochemical potentiokinetic method in a sodium bromide solution to determine a pitting potential corresponding to stability of the film. As a result, the TDS successfully and quantitatively detected three states of bound water from the passive film on Ti. As a passivation time increased, a pitting potential of Ti shifted to more positive direction and an amount of bound water increased. In other words, improvement to stability of the passive film was achieved by increasing the amount of bound water in the film. The finding was the opposite result from stainless steels.

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  • Cathodic cage plasma deposition of TiN and TiO2 thin films on silicon substrates

    Romulo R. M. de Sousa, Patricia S. Sato, Bartolomeu C. Viana, Clodomiro Alves, Akio Nishimoto, Pedro A. P. Nascente

    JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A   33 ( 4 )   2015.7

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    Cathodic cage plasma deposition (CCPD) was used for growing titanium nitride (TiN) and titanium dioxide (TiO2) thin films on silicon substrates. The main advantages of the CCPD technique are the uniformity, tridimensionality, and high rate of the film deposition that occurs at higher pressures, lower temperatures, and lower treatment times than those used in conventional nitriding treatments. In this work, the influence of the temperature and gas atmosphere upon the characteristics of the deposited films was investigated. The TiN and TiO2 thin films were characterized by x-ray diffraction, scanning electron microscopy, and Raman spectroscopy to analyze their chemical, structural, and morphological characteristics, and the combination of these results indicates that the low-cost CCPD technique can be used to produce even and highly crystalline TiN and TiO2 films. (C) 2015 American Vacuum Society.

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  • Preparation of Lead-Free Machinable Brass dispersed MnS by Hot Extrusion of Machined Chips Reviewed

    Vol. 53, p.150-155 ( 1 )   150 - 155   2014.8

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  • Effect of Screen Open Area on Active Screen Plasma Nitriding of Austenitic Stainless Steel

    Akio Nishimoto, Tatsuya Matsukawa, Hiroaki Nii

    ISIJ INTERNATIONAL   54 ( 4 )   916 - 919   2014

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    Austenitic stainless steel SUS 316L was nitrided by active screen plasma nitriding (ASPN) using screens with various open areas to investigate the effect of the screen's open area ratio on the nitriding response. The sample was placed on the sample stage in a floating potential and isolated from the cathodic screen and anode. The screen, which was SUS 316L expanded metal mesh with 38%, 48%, or 63% open area ratio, was mounted on the cathodic stage around the sample stage. Nitriding was performed in a nitrogen hydrogen atmosphere with 25% N-2 + 75% H-2 for 18 ks at 693 K under 600 Pa by the ASPN process. After nitriding, the nitrided microstructure was examined using a scanning electron microscope and an electron probe microanalyzer. The phase structures on the nitrided surface were determined by X-ray diffraction. In addition, the surface hardness and cross section of the nitrided samples were measured by the use of a Vickers microhardness tester. The thickness of the nitrided layer of the S-phase decreased with increasing open area ratio of the screen.

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  • Pulsed Electric Current Bonding of Tungsten to Titanium

    Keisuke Kobuchi, Akio Nishimoto

    METALLOGRAPHY XV   782   445 - +   2014

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    Pulsed electric-current sintering was applied to the bonding of tungsten to titanium. The influence of bonding condition on the bond strength of joint was investigated by observing the microstructure. The bonding process was carried out at bonding temperature from 773 to 1273 K for 1.8 ks at a bonding pressure of 40 MPa. The bond strength of the joint bonded at the temperature higher than 1173 K was around 200 MPa. This joint fractured in the tungsten during tensile test. SEM-EDX observation revealed that W diffused into Ti at the joint interface of the joint bonded at the temperature higher than 973 K.

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  • Effect of Sample Mount on Active Screen Plasma Duplex Processing

    Akio Nishimoto, Kunishige Nakazawa

    METALLOGRAPHY XV   782   16 - +   2014

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    Nitriding steel sample SACM645 was nitrided by active screen plasma nitriding using a titanium double screen to form simultaneously TiN coatings/nitrogen-diffusion layer on the sample surface. The sample was placed on the sample mount of the various materials (SACM 645, Cu, Ti and SiO2-Al2O3). The sample with the mount was placed on the sample stage in a cathodic potential. A titanium double screen was placed on the cathodic stage around the mount. Active screen plasma duplex processing were performed in 75% N-2 + 25% H(2)atmosphere for 18 ks at 823 K under 100 Pa. In each sample, the hardness of the sample surface was high and beneath compound layer, the hardness decreased rapidly with the distance from the surface, following a flattening of the profile. Wear loss of each duplex-processed sample decreased than that of untreated sample. Particularly, wear loss of the sample using the Ti mount considerably decreased.

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  • Recent Developments in Plasma Nitriding Treatment Technology

    NISHIMOTO Akio

    Shinku   56 ( 8 )   303 - 306   2013.8

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    Recent developments in plasma nitriding heat treatment technology were reviewed. The feature of plasma nitriding technology was introduced. Moreover, characteristics of the S phase, which was formed at 673 to 723 K in plasma nitriding of austenitic stainless steel, were explained. Finally, a new nitriding technology, — active screen plasma nitriding technology, was also explained.<br>

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  • Simultaneous duplex process of TiN coating and nitriding by active screen plasma nitriding

    Akio Nishimoto, Hiroald Nii, Ryota Narita, Katsuya Akamatsu

    SURFACE & COATINGS TECHNOLOGY   228   S558 - S562   2013.8

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    Nitriding steel sample SACM 645 was nitrided by active screen plasma nitriding (ASPN) using a titanium screen to form simultaneously TiN coating/nitrogen-diffusion layer on the sample surface. ASPN experiments were carried out using a DC plasma-nitriding unit. The sample was placed on the sample stage in a floating potential and a cathodic potential. A titanium double screen was mounted on the cathodic stage around the sample stage. ASPN treatments at 0%-bias and 100%-bias were performed in a nitrogen-hydrogen atmosphere with 75% N-2 + 25% H-2 for 0-54 ks at 873 K under 100 Pa. After nitriding, the nitrided microstructure was examined with a scanning electron microscope, glow discharge optical emission spectroscopy and X-ray diffraction studies. In addition, the hardness of the surface and the cross-sections of the nitrided sample were measured using a Vickers microhardness tester under a 0.1-N load. The thickness of the TiN layer grew linearly with increasing nitriding time. In this case, the deposition rate of the TiN layer was 0.22 mu m/h. The nitrided layer formed by ASPN at 100%-bias consisted of a TiN compound layer followed by a nitrogen-diffusion layer. (C) 2012 Elsevier B.V. All rights reserved.

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  • Solid-Carburizing Process of Low Carbon Steel with Carbonized Organics in Nitrogen Atmosphere

    Junta Nukui, Akio Nishimoto, Katsuya Akamatsu

    JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS   77 ( 4 )   153 - 158   2013

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    To apply carbonized organics to solid-carburizing compounds, a low carbon steel, S15C substrate, was solid-carburized at 1223 K for 18.0 ks in air with various carbonized organics in nitrogen atmosphere. Each organic changed to the black carbonized matter after carbonizing at 723 K, whereas almost organics kept a shape during carbonizing. X-ray diffraction (XRD) results show that Ca-5(PO4)(3)(OH), both KCl and KHCO3, BaCO3 and CaCO3 were identified on the surface of carbonized meat and bone meal which is organic animal products, carbonized potato, pumpkin and eggplant which are organic plant products, commercial solid-carburizing powder and milled egg shell powder, respectively. As a result of cross-sectional morphology, the martensitic structure was clearly observed on the surface region of each solid-carburized S15C sample after quenching. Hardened layer depth of most samples solid-carburized with various carbonized organics were comparable to the sample treated with commercial solid-carburizing powder, or more. These results indicate that the carbonate in solid-carburizing compounds acts as energizer for solid-carburizing process and carbonized organics and milled egg shell powder can also be used as compounds and energizer for solid-carburizing process, respectively.

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  • Simultaneous Diffusion Coating of Cr and Si on Stainless Steel using Fluoride-Free Activator

    Hiromu Fujimura, Akio Nishimoto, Katsuya Akamatsu

    JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS   77 ( 8 )   334 - 338   2013

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    The simultaneous deposition of chromium and silicon on stainless steel using a halide-activated diffusion coating process was performed to improve oxidation properties at high temperatures. Conventional procedure in diffusion coating process uses an activator containing fluoride. Fluoride is harmful for the human body and the environment. This experimental object is a development of the fluoride-free activator in diffusion coating of chromizing-siliconizing. In this investigation, Cr-Si intermetallic compound layers were coated on stainless steel by the pack cementation to improve its oxidation resistance and the resulting properties of the obtained coatings were investigated. The pack powders used for the diffusion coating were Cr and Si as diffusion element, Al2O3 as filler, and NH4Cl and CaCl2 as fluoride-free activator or NH4Cl, NaF and AlF3 as fluoride-added activator. The diffusion coating treatment was conducted at 1323 K for 18.0 ks in an Ar atmosphere. After the simultaneous deposition of chromium and silicon on stainless steel, a modified layer was observed on the treated sample surface and fluoride-free activator could also modify the steel surface using pack cementation.

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  • Characterization of Hot-Steam Oxidation Tested Chromosiliconized Heat-Resistant Austenitic Stainless Steel

    Yasuhiro Hoshiyama, Xiaoying Li, Hanshan Dong, Akio Nishimoto

    MATERIALS TRANSACTIONS   53 ( 6 )   1090 - 1093   2012.6

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    In this study, a duplex chromizing-siliconizing coating was produced on heat-resistant austenitic stainless steel by pack cementation. The chromizing-siliconizing of the duplex chromosiliconized coating was evaluated in 873 K hot steam for 3.6 x 10(3) ks, and the oxidized as well as the coated samples were characterized. A duplex chromosiliconizing coating has been successfully applied to heat-resistant austenitic stainless steel by pack cementation. This coating containing Cr and Si can effectively improve the oxidation resistance of heat-resistant austenitic stainless steel in 873 K hot steam for 3.6 x 10(3) ks. [doi:10.2320/matertrans.M2011396]

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  • Effect of Nitriding parameter on Active Screen Plasma Nitriding Response of SACM645 Steel Reviewed

    A. Nishimoto, H. Nii, T. Haruna, T. Maruyama, H. Miyake

    Science and Technology Reports of Kansai University   Vol. 54, p. 183-190   183 - 190   2012.3

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  • Surface modification of ferritic stainless steel by active screen plasma nitriding

    H. Nii, A. Nishimoto

    INTERNATIONAL SYMPOSIUM ON MATERIALS SCIENCE AND INNOVATION FOR SUSTAINABLE SOCIETY: ECO-MATERIALS AND ECO-INNOVATION FOR GLOBAL SUSTAINABILITY (ECO-MATES 2011)   379   2012

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    Plasma nitriding is a surface modification process with a low environmental impact. Active screen plasma nitriding (ASPN) is one of the new plasma nitriding technologies, and can eliminate problems related to conventional direct current plasma nitriding (DCPN). In this study, ferritic stainless steel SUS430 samples were treated by ASPN to increase their wear resistance without decreasing their corrosion resistance. ASPN was performed in a nitrogen-hydrogen atmosphere with 25% N-2 + 75% H-2 for 18 ks at 623 K, 673 K, 723 K, 773 K, and 823 K under 600 Pa using an SUS304 screen. When the sample was treated at 673 K by ASPN, the pitting corrosion resistance and wear resistance of its surface were improved because of the formation of the S-alpha phase and a deposited layer containing Ni on the sample surface.

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  • Preparation of Chromium Silicide Intermetallic Compound Coatings on Austenitic Stainless Steel by Pulsed Electric Current Sintering

    Atsuhiro Miyata, Akio Nishimoto, Katsuya Akamatsu

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   75 ( 9 )   469 - 473   2011.9

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    Cr Si intermetallic compound coatings were coated on an austenitic stainless steel SUS310S substrate by pulsed electric current sintering process to improve its wear and oxidation resistances. The coating was carried out for 0.6-10.8 ks at 1073-1323 K at a coating pressure of 60 MPa. As a result of pin on disk wear test, the wear property of the coatings was more excellent than that of the substrate. The tensile strength of the coatings was 10-20 MPa. These coatings fractured at the interface between the coatings and the substrate during tensile test. As a result of hot hardness test, the coatings showed higher hardness than the substrate, even at high temperature. Hardness of the coatings fell gradually up to the transition temperature of 870 K and decreased rapidly on further heating. As a result of oxidation testing for 700 ks at 1123 K, the mass increase of the coatings after oxidizing was less than that of the substrate. These results indicate that wear resistance and strength at elevated temperature could be given to the substrate without deteriorating oxidation resistance.

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  • Effect of gas pressure on active screen plasma nitriding response

    Akio Nishimoto, Kimiaki Nagatsuka, Ryota Narita, Hiroaki Nii, Katsuya Akamatsu

    Journal of ASTM International   8 ( 3 )   2011.3

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    An austenitic stainless steel AISI 304 was active screen plasma nitrided using a 304 steel screen to investigate the effect of the gas pressure on the nitriding response. The sample was treated for 18 ks at 723 K in 25 % N2 + 75 % H2. The gas pressure was changed to 100, 600, and 1200 Pa. The distance between the screen and the sample was also changed to 10, 30, and 50 mm. The nitrided samples were characterized by observing their appearance and surface roughness by optical microscopy, X-ray diffraction, and microhardness testing. After nitriding, polygonal particles with a normal distribution were observed at the center and edges of all the nitrided sample surfaces. The particles on the sample surface became finer with an increase in the gas pressure. The nitrided layer with a greater and homogeneous thickness was obtained at a low gas pressure of 100 Pa. Copyright © 2011 by ASTM International.

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  • Surface hardening of duplex stainless steel by low temperature active screen plasma nitriding

    Kimiaki Nagatsuka, Akio Nishimoto, Katsuya Akamatsu

    SURFACE & COATINGS TECHNOLOGY   205   S295 - S299   2010.12

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    The duplex stainless steel has high strength and excellent corrosion resistance. Since this steel has low hardness and wear resistance, the surface hardening treatment should be carried out under the wear environment. In this study, plasma nitriding has been applied for the improvement of wear resistance. However, traditional plasma nitriding at temperatures ranging from 723 to 823 K decreases the corrosion resistance of stainless steel. This is because the chromium in the steel reacts with nitrogen to form chromium nitride, and this decreases the concentration of chromium in the matrix, which is required for the formation of stable passive layers. Plasma nitriding carried out below 723 K forms a nitrided layer that is called the S phase. This phase improves the surface hardness without decreasing the corrosion resistance. Therefore, a low temperature plasma nitriding technique was used for treating stainless steel. Active screen plasma nitriding (ASPN) was carried out as the plasma nitriding process in addition to the conventional direct plasma nitriding (DCPN). ASPN has several advantages over the conventional DCPN, such as eliminating the edge effect, arcing, and carrying out hollow cathode discharge.
    The sample used was SUS 329J4L (X2CrNiMoCuN25-6-3). Nitriding was carried out at 673 and 723 K for 18 ks by DCPN and ASPN. The nitrided samples were then analyzed by various tests such as appearance observation, X-ray diffraction, SEM-EDX analysis, hardness testing, wear testing, and corrosion testing by measuring the pitting potential. After nitriding, the ASPN process improved the wear resistance and eliminated the edge effect when compared with the DCPN process. The S phase was observed on all the treated samples, and this phase was uniformly formed on both austenitic and ferritic phases of ASPN samples. Moreover, the corrosion tests showed that the pitting potential did not decrease with plasma nitriding. (C) 2010 Elsevier B.V. All rights reserved.

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  • Effect of the distance between screen and sample on active screen plasma nitriding properties

    Akio Nishimoto, Kimiaki Nagatsuka, Ryota Narita, Hiroaki Nii, Katsuya Akamatsu

    SURFACE & COATINGS TECHNOLOGY   205   S365 - S368   2010.12

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    Recently there has been considerable interest in active screen plasma nitriding (ASPN), through-cage plasma nitriding, and cathodic-cage plasma nitriding. In these processes, the edge effect is completely eliminated because plasma is produced on the cage and not directly on the samples. However, little information has been reported on the effect of the distance between the screen and the sample on the ASPN properties. The objective of this study is to investigate this effect by nitriding low-carbon steel S15C and austenitic stainless steel SUS 304 by ASPN using a 304 steel screen.The sample was treated for 18 ks at 723 K under 600 Pa in 25% N(2) + 75% H(2). The distance between the screen and the sample was changed to 10, 20, 30, 40, and 50 mm. The nitrided samples were characterized by observing their appearance and surface roughness by optical microscopy, scanning electron microscopy, x-ray diffraction, and microhardness testing. After nitriding, polygonal particles with a normal distribution were observed at the entire of all the ASPN-treated sample surfaces. The particles on the sample surface became coarser with a decrease in the distance between the screen and the sample. Furthermore, the thickness of the surface-hardened layer increased with a decrease in the distance between the screen and the sample. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.surfcoat.2010.08.034

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  • Development of free-cutting brass without Pb by hot extrusion Reviewed

    Copper and copper alloy   Vol. 49, p.254-257 ( 1 )   254 - 257   2010.8

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  • Feasibility study of active screen plasma nitriding of titanium alloy Reviewed

    A. Nishimoto, T. E. Bell, T. Bell

    Surface Engineering   Vol. 26, No. 1-2, p.79-84   2010.1

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  • Effect of Pre-Deforming on Plasma Nitriding Response of 304 Stainless Steel

    Akio Nishimoto, Katsuya Akamatsu

    PRICM 7, PTS 1-3   654-656   1811 - 1814   2010

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    The effect of a modified layer caused by pre-deforming on the low temperature plasma nitriding of AISI 304 austenitic stainless steel was investigated. The aim of using the deformed layer is to produce a thicker nitrided layer and to decrease the nitriding temperature due to the much faster diffusion of nitrogen. The pre-deformed sample was prepared by the rolling in 0, 1, 2, 3, and 4% ratios. Plasma nitriding was carried out at 673 and 723 K for 18 ks under 600 Pa pressures in presence of N(2)/H(2) in 50:50 ratio. The microhardness, thickness and phase composition of nitrided layers formed on the surface of pre-deformed and non-deformed samples were investigated using Vickers microhardness tester, optical microscope and X-ray diffraction techniques, respectively. After nitriding, maximum hardness similar to 1150 HV was achieved on the pre-deformed sample. XRD pattern showed that most dominant phase of the nitrided layer consisted of the expanded austenite (S phase). In addition, the pre-deforming by rolling had a significant influence on the hardness and thickness of the S phase. That is, the hardness and thickness of the S phase were increased by applying the pre-deformation.

    DOI: 10.4028/www.scientific.net/MSF.654-656.1811

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  • Preparation of Homogeneous Nb-Al Intermetallic Compound Sheet by Multi-Layered Rolling and Subsequent Heat Treatment

    Akio Nishimoto, Katsuya Akamatsu

    THERMEC 2009, PTS 1-4   638-642   1390 - 1393   2010

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    The intermetallic compound Nb(3)Al is widely investigated because of its high temperature strength, superior superconductivity and relatively small density As Nb(3)Al has an extremely high melting point and lack of deformability, it is impossible to prepare it by using the conventional metallurgy. In this study, a Nb-Al intermetallic compound was prepared by multi-layered roll-bonding of elemental Nb and Al foils The process consisted of the accumulative roll-bonding (ARB) for making a laminated Nb/Al sheet and the subsequent heat treatment promoting a solid-phase reaction in the laminated Nb/Al sheet Accumulated foils were roll-bonded at 573 K The rolling reduction at I pass was similar to 50%, and the final rolling reduction at 4 passes was similar to 94%. A pulsed electric current sintering (PECS) process was used for the subsequent heat treatment The microstructures produced at each processing stage were characterized by X-ray diffraction (XRD), optical microscopy and scanning electron microscopy (S EM) equipped with energy-dispersive X-ray spectroscopy (EDS). A homogeneous intermetallic compound of Nb(3)Al could be obtained after the subsequent heat treatment for 1.8 ks at 873 K and for 0.9 ks at 1673 K

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  • Development of New Copper Alloy : Influence of Metallic Elements on the Human Body

    Akamatsu Katsuya, Kobayashi Takeshi, Nishimoto Akio

    Engineering & technology   Vol.16, 31-36   31 - 36   2009.12

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  • Chromizing-Siliconizing Coating on Austenitic Stainless Steel by Pack Cementation Method Reviewed

    Akio Nishimoto, Katsuya Akamatsu, Ryosuke Wada

    Journal of the Japan Society for Heat Treatment   Vol.49 Spec. Iss., p.385-387   2009.10

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  • Development of Superior Heat Resistant Cu-Si Alloys Dispersed with Fine Mo5Si3 Particles Reviewed

    Akio NISHIMOTO

    Journal of the Japan Society for Heat Treatment   Vol.49 Spec. Iss., p.663-666   2009.10

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  • Consolidation of Free-Cutting Pb-Free Brass by Hot Extrusion and Its Properties Reviewed

    Akio NISHIMOTO

    Journal of the Japan Society for Heat Treatment   Vol.49 Spec. Iss., p.651-654   2009.10

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  • Low Temperature Plasma Nitriding of High Silicon Duplex Stainless Steel Reviewed

    Kimiaki Nagatsuka, Akio Nishimoto, Katsuya Akamatsu

    Journal of the Japan Society for Heat Treatment   Vol.49 Spec. Iss., p.312-315   2009.10

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  • Effect of Through Cage on Active Screen Plasma Nitriding Properties

    Akio Nishimoto, Atsushi Tokuda, Katsuya Akamatsu

    MATERIALS TRANSACTIONS   50 ( 5 )   1169 - 1173   2009.5

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    Low carbon steel S15CK was nitrided by active screen plasma nitriding (ASPN) using various stainless steel cages to investigate the effect of the cage on the nitriding properties. Three types of austenitic stainless steel cages, such as pipe, foil, and wire mesh, were used. The sample was treated for 18 ks at 773 K under 630 Pa in 50% N-2 + 50% H-2 gases. The nitrided samples were characterized by surface roughness tests. optical microscopy, scanning electron microscopy, X-ray diffraction, and microhardness testing. In all samples nitrided by the ASPN process, the 'edging effect' was completely eliminated whereas hardness and thickness of the surface layer were comparable with those obtained front the DC plasma nitriding. Moreover, a comparison of the screens used in the ASPN process revealed that the screen hole size had a slight influence on surface properties such as microstructure and hardness. [doi: 10.2320/matertrans.MRA2008431]

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  • Effect of Pre-deforming on Low Temperature Plasma Nitriding of Austenitic Stainless Steel Reviewed

    Akio Nishimoto, Katsuya Akamatsu

    PLASMA PROCESSES AND POLYMERS   6   S306 - S309   2009

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    This paper reports a study on the effect of a modified layer caused by pre-deforming on the low temperature plasma nitriding of SUS 316 austenitic stainless steel. The pre-deformed sample was prepared by the rolling in 0, 1, 2, 5, and 10% ratios. Plasma nitriding was carried out at 673 and 723 K for 18 ks under 600 Pa pressures in the presence of N(2)/H(2) in 50:50 ratio. After nitriding, maximum hardness similar to 1070 HV was achieved on the pre-deformed sample. XRD pattern showed that the most dominant phase of the nitrided layer consisted of the expanded austenite (S phase). In addition, the pre-deforming by the rolling had a great influence on the increment of hardness and thickness of the S phase.

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  • Microstructure and Oxidation Resistance of Fe3Al Coatings on Austenitic Stainless Steel by Spark Plasma Sintering

    Akio Nishimoto, Katsuya Akamatsu

    PLASMA PROCESSES AND POLYMERS   6   S941 - S943   2009

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    Fe3Al intermetallic compound layers were coated on austenitic stainless steel SUS304 by the spark plasma sintering (SPS) process to improve its wear and oxidation resistances. The coating was carried out at 1173 K for 0.6-10.8 ks at a coating pressure of 3-45 MPa. The coatings were densified with increase in the sinter-coating temperature and pressure. The tensile strength of the coatings was 30-50 MPa. These coatings fractured at the interface between the coatings and the substrate. The mass increase of coated specimen after oxidizing at 1123 K for 1000 ks was less than that of the untreated specimen. This result indicates that the Fe-Al intermetallic compound coating markedly improved the oxidation resistance of the austenitic stainless steel.

    DOI: 10.1002/ppap.200932407

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  • Trends in surface modification technology of metallic materials

    Engineering & technology   Vol.14, (1), 77-80 ( 1 )   77 - 80   2007.11

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  • Pulsed Electric-Current Bonding of Al2O3 to Cu with Intermediate Layer Reviewed

    A.Nishimoto, K.Akamatsu

    Acta Metallurgica Slovaca   Vol.13 p.310-313   2007

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  • Microstructure of SiC/Cu interface by pulsed electric-current bonding

    Akio Nishimoto, Katsuya Akamatsu, Kenji Ikeuchi

    THERMEC 2006, PTS 1-5   539-543   3883 - +   2007

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    Pulsed electric-current sintering (PECS) was applied to the bonding of SiC (pressureless-sintered silicon carbide) to Cu (oxygen-free copper) using a mixture of Cu and Ti powders as an intermediate layer. The influences of the intermediate powders on the bond strength of the joint were investigated by observation of the microstructure. The bonding was carried out at carbon-die temperatures from 973 to 1173 K at a bonding pressure of 10 MPa for 3.6 ks. The application of intermediate layers of 100% Ti, 95% Ti + 5% Cu, and 5% Ti + 95% Cu remarkably improved the bond strength as compared with direct bonding without an intermediate powder. SEM observations of the joint with the intermediate powders revealed that a Cu solid-solution layer, a TiC layer, and a Ti5Si3 layer had covered most of the interface, similar to those observed in the friction-bonded and pulsed-electric current bonded joints of SiC to Cu in which the application of a Ti foil as an intermediate layer remarkably improved the bond strength.

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  • Preparation of homogeneous Fe-Al intermetallic compound sheet by multi-layered rolling and subsequent heat treatment

    Akio Nishimoto, Katsuya Akamatsu

    PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3   561-565   857 - 860   2007

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    Iron aluminides exhibit good resistance to high-temperature oxidizing and sulphidizing environments and have potential for structural applications at high temperatures under corrosive environments. In this study, an Fe-Al intermetallic compound was prepared by multi-layered roll-bonding of elemental Fe and Al foils. The process consisted of the accumulative roll-bonding (ARB) for making a laminated Fe/Al sheet and the subsequent heat treatment promoting a solid-phase reaction in the laminated Fe/Al sheet. Accumulated foils were rolled and bonded at room temperature or 573 K. A pulsed electric current sintering (PECS) process was used for the subsequent heat treatment. The microstructures produced at each processing stage were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectroscopy (EDS). Vickers microhardness testing was used for hardness determination. A homogeneous intermetallic compound of Fe3Al or FeAl could be obtained after the subsequent heat treatment for 1.8 ks at 873 K and for 3.6 ks at 1173 K.

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  • Pulsed electric current bonding of tungsten to copper with intermediate layer

    Akio Nishimoto, Katsuya Akamatsu

    DESIGNING OF INTERFACIAL STRUCTURES IN ADVANCED MATERIALS AND THEIR JOINTS   127   289 - +   2007

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    Pulsed electric current sintering (PECS) was applied to the bonding of W (tungsten) to Cu (copper) using Nb or Ni powder as an intermediate layer. The influence of the intermediate layer on the bond strength of the joint was investigated by observation of the microstructure. The bonding process was carried out at carbon-die temperatures of 1073 and 1173 K for 1.8 ks at a bonding pressure of 130 MPa. The bond strength of the joint with an intermediate layer of Ni powder was 250 MPa. This joint fractured in the Cu base during the tensile test. SEM observations of the joint with an intermediate layer of Ni revealed that a diffusion layer formed at the joint interface.

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  • Atomization of Corson System Alloy by Rotating Electrode Process and Properties of its Sintered Products Reviewed

    Copper and copper alloy   Vol.45, p. 31-35 ( 1 )   31 - 36   2006.8

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  • Microstructure and Mechanical Properties at High Temperature of Hypereutectic Al-Si Alloy

    K.Akamatsu, A. Nishimoto, K. Ichii

    Proceedings of the 3rd ASIAN CONFERENCE on Heat Treatment of Materials (AHTM2005)   p.421-423   2005.11

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  • Development and Properties of Powder for Preventing Carburization

    K.Akamatsu, A. Nishimoto, K. Itoh, T. Murata

    Proceedings of the 3rd ASIAN CONFERENCE on Heat Treatment of Materials (AHTM2005)   p.269-271   2005.11

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  • Simultaneous chromizing-siliconizing diffusion coating on austenitic stainless steel

    Akio Nishimoto, Kazuyoshi Nakao, Kazuo Ichii, Katsuya Akamatsu

    Novel Materials Processing by Advanced Electromagnetic Energy Sources   p.433-436   433 - 436   2005

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    The simultaneous deposition of chromium and silicon on austenitic stainless steel SUS310S using a halide-activated diffusion coating process is performed in order to improve oxidation and wear properties at high temperatures. The specimen placed in an A12O3 crucible is filled with a powder containing Cr-Si powder, a halide activator of NH4CI, NaF, A1F3, and an A12O3 filler powder. The diffusion-coating treatment is carried out at 1073-1323 Kelvin (K) for 18 ks in argon atmosphere. Simultaneous diffusion-coating layers are mainly characterized chromium silicide and alpha ferrite. An oxidation characteristic after diffusion coating is investigated for 1000 ks at 1073 K in air. The mass increase of diffusion-coated specimen is less than that of the untreated specimen. This result indicates that the simultaneous deposition of chromium (Cr) and silicon (Si) markedly improved the oxidation resistance of the austenitic stainless steel. © 2005 Elsevier Ltd.

    DOI: 10.1016/B978-008044504-5/50089-1

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  • Formation of interfacial phases at a SiC/Cu joint friction-bonded with Ti

    A Nishimoto, K Akamatsu, M Takahashi, K Ikeuchi, M Ando, M Aritoshi

    CHARACTERIZATION AND CONTROL OF INTERFACES FOR HIGH QUALITY ADVANCED MATERIALS   146   237 - 244   2005

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    The interfacial microstructure of a SiC/Cu joint friction-bonded with a Ti intermediate layer has been characterized with TEM to determine the process by which Interfacial layers of mainly TIC and a Cu-alloy (adjacent to the SIC matrix) form. The formation of these layers Is greatly suppressed by water quenching just after the forging stage. In the quenched joint, almost the entire interface is comprised of a Ti-rich layer a few nm thick. TEM observations of the interface after reheating quenched joints at 1073 K and 773 K indicate that the reaction to form the TiC and the Cu-alloy layers can proceed at 1073 K but not at 773 K. These results suggest that the formation of the TiC and Cu-alloy layers starts during the forging stage, and that the layers grow at temperatures higher than 773 K during the cooling process.

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  • Interfacial Microstructure of SiC/Cu Joint Pulsed Electric-Current Bonded with Intermediate Powders

    A.Nishimoto, K.Akamatsu, Y.Toda, M.Sakaguchi

    New Frontiers of Process Science and Engineering in Advanced Materials   p.455-460   2004.11

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  • Formation Behavior of Fe-Al Intermetallic Compounds by Multi-Layered Rolling and Heat Treatment Reviewed

    Nishimoto Akio, Ogata Hiroyuki, Nakao Kazuyoshi, Akamatsu Katsuya

    Journal of the Japan Society for Heat Treatment   Vol.44 No.2, p.89-94   9 - 14   2004.4

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  • Thermal properties of Al-50%Si alloys

    A Nishimoto, K Akamatsu, K Nakao, K Ichii

    14TH CONGRESS OF INTERNATIONAL FEDERATION FOR HEAT TREATMENT AND SURFACE ENGINEERING, VOLS 1 AND 2, PROCEEDINGS   Vol.25 No.5 p.180-182   180 - 182   2004

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    In order to prepare a hypereutectic Al-Si alloy with low coefficients of thermal expansion (CTE), Al-50%Si alloy was produced by powder metallurgy (P/M) and ingot metallurgy (I/M). P/M specimen was prepared by mechanical alloying (MA) and pulsed electric-current sintering (PECS). The microstructures of specimens were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Vickers microhardness and CTE measurements were performed. The grains in the P/M specimen were refined with increasing MA time. Primary Si and eutectic Si in the I/M specimen were remarkably refined by adding minute amounts of Sr. The CTE of P/M and I/M specimens were estimated as 7.8x10(-6) and 10.7x10(-6), respectively. These values were as same as a CTE of Al2O3 ceramics.

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  • Preparation of Fe-Al binary system intermetallic compounds by multi-layered roll-bonding

    A Nishimoto, K Akamatsu, K Nakao, K Ichii, T Hiraki

    14TH CONGRESS OF INTERNATIONAL FEDERATION FOR HEAT TREATMENT AND SURFACE ENGINEERING, VOLS 1 AND 2, PROCEEDINGS   Vol.25 No.5 p.53-55   53 - 55   2004

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    Iron aluminides exhibit good resistance to high-temperature sulfidizing and oxidizing environments and potential for structural applications at high temperatures under corrosive environments. In this study, Fe-Al intermetallic compound was prepared by multi-layered roll-bonding of elemental Fe and Al foils. The process consisted of the accumulative roll-bonding (ARB) for making a laminated Fe/Al sheet and the subsequent heat treatment promoting a solid phase reaction in the laminated Fe/Al sheet. The microstructures produced at each processing stage were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Vickers microhardness testing was used for hardness determination. A homogeneous intermetallic compound of Fe3Al or FeAl could be obtained after the subsequent heat treatment for 1.8 ks at 973 K and for 10.8 ks at 1123 or 1173 K.

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  • Preparation of Fe-Al binary system intermetallic compounds by multi-layered roll-bonding

    A Nishimoto, K Akamatsu, K Nakao, K Ichii, T Hiraki

    14TH CONGRESS OF INTERNATIONAL FEDERATION FOR HEAT TREATMENT AND SURFACE ENGINEERING, VOLS 1 AND 2, PROCEEDINGS   p.283-286   53 - 55   2004

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    Iron aluminides exhibit good resistance to high-temperature sulfidizing and oxidizing environments and potential for structural applications at high temperatures under corrosive environments. In this study, Fe-Al intermetallic compound was prepared by multi-layered roll-bonding of elemental Fe and Al foils. The process consisted of the accumulative roll-bonding (ARB) for making a laminated Fe/Al sheet and the subsequent heat treatment promoting a solid phase reaction in the laminated Fe/Al sheet. The microstructures produced at each processing stage were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Vickers microhardness testing was used for hardness determination. A homogeneous intermetallic compound of Fe3Al or FeAl could be obtained after the subsequent heat treatment for 1.8 ks at 973 K and for 10.8 ks at 1123 or 1173 K.

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  • Interfacial microstructure of SiC/Cu joint friction-bonded with Ti intermediate layer

    A Nishimoto, M Ando, M Takahashi, M Aritoshi, K Akamatsu, K Ikeuchi

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   67 ( 10 )   538 - 546   2003.10

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    In order to discuss the effect of a Ti intermediate layer on the strength of the friction-bonded joint of silicon carbide to copper, the microstructure of the joint interface was observed with a TEM. Specimens to be bonded were rods of pressureless-sintered SiC and oxygen-free copper. TEM observations revealed that reaction layers less than a few 10 nm thick were formed, which were identified as Cu, TiC, and Ti5Si3 On the basis of SAD pattern and EDX analyses. The Ti5Si3 layer was partly formed as discrete islands on the Cu side of the TiC layer. The Cu layer was located between SiC matrix and TiC layer, forming TiC/Cu double layers. The TiC/Cu double layers presented preferred orientation relationships with SiC, which can be expressed by the following equations.
    (10 (1) over bar2)(6H-SiC)//(1 (1) over bar1)(TiC), [1 (2) over bar 10](6H-SiC)//[110](TiC)
    (10 (1) over bar2)(6H-SiC)//(1 (1) over bar1)(Cu), [1 (2) over bar 10](6H-SiC)//[110](Cu)
    On the other hand, the Ti5Si3 layer showed no preferred orientation relationship with SiC or Cu. In addition to these reaction layers, amorphous layers of Si oxide similar to100 nm thick were occasionally observed at the SiC/Cu interface. In the Cu-Ti mixing region adjacent to the joint interface, Cu4Ti particles similar to100 nm size in diameter were observed.

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  • Pulsed electric-current bonding of SiC to Cu with Ti intermediate layer

    A Nishimoto, K Nakao, K Akamatsu, K Ikeuchi

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   67 ( 9 )   432 - 435   2003.9

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    The bonding of SiC (pressureless-sintered silicon carbide) and Cu (oxygen-free copper) with a Ti intermediate layer was carried out using pulsed electric-current sintering. The influences of the intermediate layer on the bond strength and the microstructure of the joint were then investigated by SEM and TEM observations. The bonding conditions were varied between 923-1173 K for 1.8-3.6 ks under a constant bonding pressure of 24 MPa. The bond strength of SiC to Cu with a Ti intermediate layer showed marked improvement, whereas the direct bonding without an intermediate layer resulted in the separation of SiC from the Cu specimen immediately after the bonding operation without any application of external load. TEM observations of the joint interface with the Ti intermediate layer revealed that a TiC layer similar to300 nm thick and a Cu solid-solution layer similar to70 nm thick had covered most of the interface, with the Cu layer formed between the TiC layer and the SiC matrix.

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  • Low Temperature Nitriding of Austenitic Stainless Steel

    ICHII Kazuo, NISHIMOTO Akio, NAKAO Kazuyoshi, AKAMATSU Katsuya

    Jitsumu Hyomen Gijutsu   54 ( 3 )   200 - 203   2003.3

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    DOI: 10.4139/sfj.54.200

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  • High temperature properties of chromosiliconized stainless steels

    A Nishimoto, K Akamatsu, K Nakao, K Ichii, K Ike

    SURFACE ENGINEERING: COATING AND HEAT TREATMENTS, PROCEEDINGS   p.246-249   246 - 249   2003

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    The materials used at high temperatures have recently been required more severe properties than before. The method of the diffusion coating of silicon and chromium to the surface of a metallic materials is effective to improve oxidation and wear properties at high temperatures. The combined method of the diffusion coating processing and carburizing, or nitriding are now of this investigation.
    The obtained layer by the co-diffusion coating processing of Si and Cr depends on the composition of pack powders and the kinds of the activator. In this study, the co-diffusion coating processing of Si and Cr was done for various stainless steels. The, mixing ratio of pack powders and the kinds of the activator were investigated, and also mechanical and oxidation properties at high temperatures were studied.

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  • Microstructure of Fe-Al intermetallic compound prepared by multi-layered roll-bonding

    A Nishimoto, H Ogata, K Nakao, K Akamatsu

    SURFACE ENGINEERING: COATING AND HEAT TREATMENTS, PROCEEDINGS   p.243-245   243 - 245   2003

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    Iron aluminides exhibit good resistance to high-temperature sulfidizing and oxidizing environments and potential for structural applications at high temperatures under corrosive environments. In this study, Fe-Al intermetallic compound was prepared by multi-layered roll-bonding of elemental Fe and Al foils. The microstructures produced at each processing stage were characterized by optical microscopy, scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectrometry (EDS). Vickers microhardness; testing was used for hardness determination. Four layers composed of FeAl3, Fe2Al5, FeAl2, and FeAl were observed at the Fe/Al interface after diffusion annealing. Annealing process of Fe foils before roll-bonding and process-annealing during roll-bonding suggested a better process to obtain a homogeneous Fe-Al intermetallic compound.

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  • Oxidation Properties of Chromosiliconized Stainless Steels

    K.Akamatsu, A.Nishimoto, K.Ichii, K.Nakao, K.Ike (Nihon Calorizing Co, Ltd.)

    Proceedings of 4th European Stainless Steel Science and Market Congress   p.367-370   2002.6

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  • S Phase Formation of Some Austenitic Stainless Steels by Plasma Nitriding Reviewed

    K.Akamatsu, K.Nakao, K.Ichii, A.Nishimoto, M.Takai

    Stainless Steel 2000 (Proceedings of an International Current Status Seminar of Thermochemical Surface Engineering of Stainless Steels), MANEY Publishing   289-307   2001.12

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  • S Phase Formation of Austenitic Stainless Steel by Low Temperature Plasma Nitriding

    K.Akamatsu, A.Nishimoto, K.Nakao, K.Ichii

    Proceedings of The 2nd Asian Conference on Heat Treatment of Materials   154-159   2001.9

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  • Plasma-sulphonitriding by SF6 and H2S gas

    K.Akamatsu, A.Nishimoto, K.Nakao, K.Ichii

    Proceedings of The 2nd Asian Conference on Heat Treatment of Materials   248-253   2001.9

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  • Interfacial Reactions in Ceramics/Metal Joint Friction-Bonded with Active-Metal Intermediate Layer and Their Influences on Joint Properties

    A.Nishimoto, M.Takahashi, K.Ikeuchi, M.Ando, M.Aritoshi

    Joining of Advanced and Specialty Materials III   p.148-156   2001

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  • Friction bonding of silicon carbide to oxygen-free copper with an intermediate layer of reactive metal (reprinted from Journal of the Japan Institute of Metals, vol 65, pg 895-904, 1999)

    A Nishimoto, M Ando, M Takahashi, M Aritoshi, K Ikeuchi

    MATERIALS TRANSACTIONS JIM   41 ( 12 )   1636 - 1645   2000.12

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    Intermediate layers of various metals ranging from reactive metals to noble metals have been applied to friction bonding of SiC (pressureless-sintered silicon carbide) to Cu (oxygen-free copper), and their influences on the bond strength and microstructures of the joint have been systematically investigated by means of TEM observations. When a thin foil of reactive metal, Al, Ti, Zr, or Nh, was applied as the intermediate layer, the bond strength of SIC to Cu was improved considerably. In contrast, when an intermediate layer of Fe, Ni, or Ag was applied, the SiC specimen separated from the Cu specimen immediately after the bonding operation without the application of external load, similar to the cast: of bonding without an intermediate layer. During friction bonding with an intermediate layer of reactive metal, the intermediate layer was mechanically mixed with Cu to form a very complicated microstructure extending over a region as wide as a few 100 mum. TEM observations have revealed that very thin reaction layers between the SIC and reactive metals were formed. When die Ti intermediate layer was applied, a TiC layer 10-30 nm thick was formed over almost the entire area along the interface, and between this layer and the SIC matrix a very thin layer of a Cu solid solution was detected. On the other side of the TiC layer, a Ti5Si3 layer similar to 100 nm thick was partially observed. When the Nb or Zr intermediate layer was applied, a very thin interfacial layer, in which Nb or Zr was significantly concentrated, was observed in addition to the reaction layers of Nb5Si3, NbC, and ZrC. These interfacial layers can be characterized by their much smaller thickness and finer grain size than those observed in diffusion-bonded and brazed joints. Apart from the layers mentioned above, amorphous silicon oxide layers were occasionally observed, suggesting that the reactive metal enhanced the removal of the oxide film on the SIC surface.

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  • Formation of Interfacial Reaction Layer in Ceramics/Metal Joint Friction-Bonded with Intermediate Layer of Active Metal

    NISHIMOTO/Akio, ANDO/Masaaki, TAKAHASHI/Makoto, ARITOSHI/Masatoshi, IKEUCHI/Kenji

    Joining of Advanced and Specialty Materials II   79頁-87頁   2000.7

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  • Composite Plating Treatment on Magnesium Alloy

    K.Akamatsu, K.Nakao, A.Nishimoto, S.Taniguchi, S.Mizunari

    Engineering & technology   Vol.12 No.2 p.17-22 ( 2 )   17 - 22   2000

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  • Effect of Ti Intermediate Layer on Bond Strength of Friction-bonded Ceramics/Metal Joint

    A.Nishimoto, M.Ando, K.Ikeuchi, M.Takahashi

    Proceedings of the 20th International Congress PROGRESS IN WELDING 50 YEARS WELDING RESEARCH INSTITUTE BRATISLAVA 1949-1999   p. 66-73   1999.5

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  • Interfacial reaction layers in SiC/Cu joint friction-bonded with Nb intermediate layer

    Akio Nishimoto, Masaaki Ando, Makoto Takahashi, Masatoshi Aritoshi, Kenji Ikeuchi

    Materials Transactions, JIM   40 ( 9 )   953 - 956   1999

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    The influences of the interfacial reaction on the microstructure and bond strength of the SiC/Cu joint friction-bonded with a Nb intermediate layer have been investigated mainly by TEM observations. It has been found that the reaction at the joint interface proceeded during the heat treatment even at temperatures below 800 K to form reaction layers approximately 100 nm thick, which caused serious degradation of the joint strength. An attempt is made to thermodynamically explain the evolution of the interfacial microstructure caused by the reaction during the heat treatment.

    DOI: 10.2320/matertrans1989.40.953

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  • Friction bonding of silicon carbide to oxygen free copper with an intermediate layer of reactive metal

    Akio Nishimoto, Masaaki Ando, Makoto Takahashi, Masatoshi Aritoshi, Kenji Ikeuchi

    Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals   63 ( 7 )   895 - 904   1999

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:JAPAN INST METALS  

    Intermediate layers of various metals ranging from reactive metals to noble metals have been applied to the friction bonding of SiC (pressureless-sintered silicon carbide) to Cu (oxygen free copper), and their influences on the bond strength and microstructures of the joint have been systematically investigated by TEM observations. When thin foils of reactive metals Al, Ti, Zr, and Nb were applied as the intermediate layer, the bond strength of SiC to Cu was improved remarkably. In contrast, when intermediate layers of Fe, Ni, and Ag were applied, the SiC specimen separated from the Cu specimen immediately after the bonding operation without application of external load, similarly to the case of bonding without an intermediate layer. In the joint bonded with the intermediate layers of the reactive metals, the intermediate layer was mechanically mixed with Cu to form a mixed region as wide as a few 100 μm. TEM observations have revealed that very thin reaction layers between the ceramics and reactive metals formed. When the Ti intermediate layer was applied, a TiC layer 10-30 nm thick formed over the almost whole interface, and between this layer and the SiC matrix a very thin layer of a Cu solid-solution was detected. On the other side of the TiC layer, a Ti5Si3 layer approximately 100 nm thick was partially observed. When the Nb and Zr intermediate layers were applied, very thin interfacial layers where Nb and Zr were significantly concentrated were observed in addition to the reaction layers of Nb5Si3, NbC and ZrC. These interfacial layers can be characterized by their much smaller thickness and finer grain size than those observed in diffusion-bonded and brazed joints. Apart from the layers mentioned above, amorphous silicon oxide layers were occasionally observed, suggesting that the reactive metal enhanced the removal of the oxide film on the SiC surface.

    DOI: 10.2320/jinstmet1952.63.7_895

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  • Microstructure and Bond Strength of Ceramics/Metal Interface by Friction Bonding

    A.Nishimoto, M.Ando, M.Takahashi, T.Kuroda, K.Ikeuchi

    Proceedings of International Symposium on Environment-Conscious Innovative Materials Processing with Advanced Energy Sources (ECOMAP-98)   p. 418-423   1999

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Books

  • 機械材料学 第5版 Reviewed

    西本 明生, (公社)日本材料学会 編( Role: Joint author)

    (公社)日本材料学会  2022.11 

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    III 各種材料 1 鉄鋼材料 1.7 表面改質

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  • 品質・環境面で効果が期待される真空熱処理技術「気相蒸着処理とプラズマ窒化処理」

    西本 明生( Role: Sole author)

    日刊工業新聞  2019.5 

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    https://www.nikkan.co.jp/space_pdfs/index/0047582

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  • 真空及びプラズマを用いた窒化処理設備

    古屋 英二(中外炉工業(株)), 西本 明生( Role: Joint author)

    工業加熱  2016.5 

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  • 均一な硬化層を形成する新プラズマ窒化処理−アクティブスクリーンプラズマ窒化−

    西本 明生( Role: Sole author)

    メカニカル・サーフェス・テック  2016.4 

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  • 溶接・接合をめぐる最近の動向 「8.表面改質技術(薄膜,厚膜,溶射)」

    西本 明生( Role: Sole author)

    溶接学会誌  2015 

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  • The latest research trends and research results in active screen plasma nitriding Reviewed

    Akio NISHIMOTO( Role: Sole author)

    J. Jpn. Soc. Heat Treat.  2013.10 

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  • Recent Developments in Plasma Nitriding Treatment Technology Reviewed

    Akio Nishimoto( Role: Sole author)

    Journal of the Vacuum Society of Japan  2013.8 

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  • Current Research Trends in International Conference on Plasma Surface Engineering Reviewed

    Akio Nishimoto( Role: Sole author)

    Journal of the Japan Society for Heat Treatment  2013.6 

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  • Joining dissimilar materials by pulsed electric current bonding Reviewed

    Akio Nishimoto( Role: Sole author)

    Journal of High Temperature Society  2011.7 

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  • 熱処理・表面処理に関する国際会議における研究動向

    西本 明生( Role: Sole author)

    熱処理  2011.6 

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  • New plasma nitriding technology using active screen

    Akio Nishimoto( Role: Sole author)

    2010.5 

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  • Trends in surface modification technology of metallic materials

    ( Role: Joint author)

    Engineering & technology  2007 

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  • 6th Pacific Rim International Conference on Advanced Materials and Processing

    A. Nishimoto( Role: Sole author)

    International Heat Treatment & Surface Engineering  2007 

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  • 最新 『異種材料』の接着・接合

    西本 明生 分担執筆( Role: Joint author)

    技術情報協会  2006.4 

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  • オーステナイト系ステンレス鋼の低温窒化

    西本 明生( Role: Joint author)

    表面技術  2003.3 

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  • 金属材料における最近の表面硬化処理技術

    西本 明生( Role: Joint author)

    工業加熱  2002.7 

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MISC

  • 積層DLCコーティングの技術動向—特集 ナノ表面改質技術

    西本 明生

    月刊トライボロジー   37 ( 1 )   12 - 14   2023.1

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  • Current research trends in international conferences of plasma surface engineering Reviewed

    Akio NISHIMOTO

    J. Jpn. Soc. Heat Treat.   Vol.53 No.3, p.144-147 ( 3 )   144 - 147   2016.6

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  • 溶接工学

    西本明生

    2013.12

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  • 鉄鋼材料の表面改質

    西本明生

    2013.7

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  • 新しい窒化法の開発に取組み中 Reviewed

    西本明生

    熱処理   Vol. 53, No. 3, p.136   2013.6

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  • アクティブスクリーンプラズマ窒化処理技術に関する最近の研究

    西本明生

    2013.3

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  • パルス通電接合法による異材接合

    西本明生

    2012.11

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  • 熱処理・表面改質技術の現状と技術動向について

    西本明生

    2012.8

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  • 鉄鋼材料の表面改質技術

    西本明生

    2011.11

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  • 材料プロセス2(表面処理)

    西本明生

    2011.10

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  • 材料プロセス2(表面処理)

    西本明生

    2011.10

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  • アクティブスクリーンプラズマ窒化処理について

    西本明生

    2011.9

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  • 熱処理・表面処理に関する国際会議における研究動向

    西本明生

    2011.2

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  • アクティブスクリーンプラズマ窒化法による表面改質技術

    西本明生

    2010.11

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  • 材料プロセス2(表面処理)

    西本明生

    2010.10

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  • 材料プロセス2(表面処理)

    西本明生

    2010.10

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  • 耐摩耗性を向上させたステンレス鋼の開発

    西本明生

    2010.10

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  • プラズマ窒化法や拡散浸透法による鉄鋼材料の表面改質技術

    西本明生

    2010.8

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  • Microstructure and Oxidation Resistance of Fe3Al Coatings on Austenitic Stainless Steel by Spark Plasma Sintering

    Akio Nishimoto, Katsuya Akamatsu

    PLASMA PROCESSES AND POLYMERS   6   S941 - S943   2009

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    Fe3Al intermetallic compound layers were coated on austenitic stainless steel SUS304 by the spark plasma sintering (SPS) process to improve its wear and oxidation resistances. The coating was carried out at 1173 K for 0.6-10.8 ks at a coating pressure of 3-45 MPa. The coatings were densified with increase in the sinter-coating temperature and pressure. The tensile strength of the coatings was 30-50 MPa. These coatings fractured at the interface between the coatings and the substrate. The mass increase of coated specimen after oxidizing at 1123 K for 1000 ks was less than that of the untreated specimen. This result indicates that the Fe-Al intermetallic compound coating markedly improved the oxidation resistance of the austenitic stainless steel.

    DOI: 10.1002/ppap.200932407

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  • Consolidation of free-cutting Pb-free brass by hot extrusion and its properties

    K. Akamatsu, A. Nishimoto, K. Nakahata, Y. Sugiura, Y. Yoshikawa

    2008.10

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  • Chromizing-siliconizing coating on austenitic stainless steel by rotating pack method

    K. Akamatsu, A. Nishimoto, R. Wada

    2008.10

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  • Low temperature plasma nitriding of high silicon stainless steel

    K. Akamatsu, A. Nishimoto, K. Nagatsuka

    2008.10

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  • Development of the Cu-Si alloys including Mo5 Si3 as second phase with superior heat resistance characteristic

    K. Akamatsu, A. Nishimoto, K. Nakao, S. Hasegawa

    2008.10

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  • Effect of pre-deforming on low temperature plasma nitriding of austenitic stainless steel

    K. Akamatsu, A. Nishimoto

    2008.9

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  • イギリス・バーミンガム滞在記

    西本 明生

    関西大学理工学会・会報   No.120 p.11-16   2008.6

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  • Chromizing-Siliconizing Coating on Austenitic Stainless Steel by Pack Cementation

    K. Akamatsu, A. Nishimoto

    2007.10

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  • Microstructure of SiC/Cu interface by pulsed electric-current bonding

    Akio Nishimoto, Katsuya Akamatsu, Kenji Ikeuchi

    THERMEC 2006, PTS 1-5   539-543   3883 - +   2007

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    Pulsed electric-current sintering (PECS) was applied to the bonding of SiC (pressureless-sintered silicon carbide) to Cu (oxygen-free copper) using a mixture of Cu and Ti powders as an intermediate layer. The influences of the intermediate powders on the bond strength of the joint were investigated by observation of the microstructure. The bonding was carried out at carbon-die temperatures from 973 to 1173 K at a bonding pressure of 10 MPa for 3.6 ks. The application of intermediate layers of 100% Ti, 95% Ti + 5% Cu, and 5% Ti + 95% Cu remarkably improved the bond strength as compared with direct bonding without an intermediate powder. SEM observations of the joint with the intermediate powders revealed that a Cu solid-solution layer, a TiC layer, and a Ti5Si3 layer had covered most of the interface, similar to those observed in the friction-bonded and pulsed-electric current bonded joints of SiC to Cu in which the application of a Ti foil as an intermediate layer remarkably improved the bond strength.

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  • Preparation of homogeneous Fe-Al intermetallic compound sheet by multi-layered rolling and subsequent heat treatment

    Akio Nishimoto, Katsuya Akamatsu

    PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3   561-565   857 - 860   2007

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    Iron aluminides exhibit good resistance to high-temperature oxidizing and sulphidizing environments and have potential for structural applications at high temperatures under corrosive environments. In this study, an Fe-Al intermetallic compound was prepared by multi-layered roll-bonding of elemental Fe and Al foils. The process consisted of the accumulative roll-bonding (ARB) for making a laminated Fe/Al sheet and the subsequent heat treatment promoting a solid-phase reaction in the laminated Fe/Al sheet. Accumulated foils were rolled and bonded at room temperature or 573 K. A pulsed electric current sintering (PECS) process was used for the subsequent heat treatment. The microstructures produced at each processing stage were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectroscopy (EDS). Vickers microhardness testing was used for hardness determination. A homogeneous intermetallic compound of Fe3Al or FeAl could be obtained after the subsequent heat treatment for 1.8 ks at 873 K and for 3.6 ks at 1173 K.

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  • Processing and Microstructure of Fe-Al Intermetallic Compounds Sheet Prepared by Multi-Layered Roll-Bonding

    A,Nishimoto, K,Akamatsu

    2007

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  • Pulsed Electric-Current Bonding of Al2O3 to Cu with Intermediate Layer

    A. Nishimoto, K. Akamatsu

    2007

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  • Pulsed electric current bonding of tungsten to copper with intermediate layer

    A. Nishimoto, K. Akamatsu

    Solid State Phenomena   Vol. 127, p.289-292   2006.5

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    http://www.scientific.net/3-908451-33-7/289/

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  • パルス通電プロセスにおけるシリカ/カーボン間の界面現象

    阪口 雅, 巻野 勇喜雄, 西本 明生, 赤松 勝也

    高温学会誌   31 ( 6 )   3 - 3   2005.11

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  • Interfacial Microstructure of SiC/Cu Joint Pulsed Electric‐Current Bonded with Intermediate Powders

    K. Akamatsu, A. Nishimoto, Y. Toda, M. Sakaguchi

    2004.11

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  • セラミックスと金属との摩擦接合技術

    西本 明生, 赤松 勝也

    技苑   119   24 - 24   2004.9

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  • Preparation of Fe-Al binary system intermetallic compounds by multi-layered roll-bonding

    A Nishimoto, K Akamatsu, K Nakao, K Ichii, T Hiraki

    14TH CONGRESS OF INTERNATIONAL FEDERATION FOR HEAT TREATMENT AND SURFACE ENGINEERING, VOLS 1 AND 2, PROCEEDINGS   53 - 55   2004

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    Language:English   Publisher:TRANSACTIONS MATERIALS & HEAT TREATMENT  

    Iron aluminides exhibit good resistance to high-temperature sulfidizing and oxidizing environments and potential for structural applications at high temperatures under corrosive environments. In this study, Fe-Al intermetallic compound was prepared by multi-layered roll-bonding of elemental Fe and Al foils. The process consisted of the accumulative roll-bonding (ARB) for making a laminated Fe/Al sheet and the subsequent heat treatment promoting a solid phase reaction in the laminated Fe/Al sheet. The microstructures produced at each processing stage were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Vickers microhardness testing was used for hardness determination. A homogeneous intermetallic compound of Fe3Al or FeAl could be obtained after the subsequent heat treatment for 1.8 ks at 973 K and for 10.8 ks at 1123 or 1173 K.

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  • Thermal properties of Al-50%Si alloys

    A Nishimoto, K Akamatsu, K Nakao, K Ichii

    14TH CONGRESS OF INTERNATIONAL FEDERATION FOR HEAT TREATMENT AND SURFACE ENGINEERING, VOLS 1 AND 2, PROCEEDINGS   180 - 182   2004

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    In order to prepare a hypereutectic Al-Si alloy with low coefficients of thermal expansion (CTE), Al-50%Si alloy was produced by powder metallurgy (P/M) and ingot metallurgy (I/M). P/M specimen was prepared by mechanical alloying (MA) and pulsed electric-current sintering (PECS). The microstructures of specimens were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Vickers microhardness and CTE measurements were performed. The grains in the P/M specimen were refined with increasing MA time. Primary Si and eutectic Si in the I/M specimen were remarkably refined by adding minute amounts of Sr. The CTE of P/M and I/M specimens were estimated as 7.8x10(-6) and 10.7x10(-6), respectively. These values were as same as a CTE of Al2O3 ceramics.

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  • Ni-P plating on magnesium alloy and its spalling

    NISHIMOTO Akio, NAKAO Kazuyoshi, AKAMATSU Katsuya

    104   109 - 110   2003.4

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  • Thermal expansion of Al-50%Si alloy

    KIGUCHI Yusuke, NISHIMOTO Akio, NAKAO Kazuyoshi, AKAMATSU Katsuya

    104   313 - 314   2003.4

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  • 高温における強度と耐酸化性を目的にした浸珪および浸クロム処理 (産学連携への掛け橋)

    赤松 勝也, 西本 明生, 中尾 和祺[他]

    技苑   113   4 - 5   2002.9

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  • 大学研究室めぐり(107)関西大学工学部材料工学科機能材料研究室

    赤松 勝也, 西本 明生, 中尾 和祺

    工業加熱   39 ( 5 )   53 - 58   2002.9

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  • Silicon and chromium diffusion coatings on stainless steels

    Nishimoto Akio, Akamatsu Katsuya, Nakao Kazuyoshi, Okuda Tomoshige

    Pre-Prints of the National Meeting of JWS   ( 69 )   406 - 407   2001.9

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  • 鉄鋼材料へのSiおよびCr複合拡散浸透処理による高温耐食性付与に関する研究 (産学連携への掛け橋)

    赤松 勝也, 中尾 和祺, 西本 明生

    技苑   108   58 - 59   2001.8

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  • High Temperature egradation of SiC/Cu Joint Friction-Bonded with an Intermediate Layer of Reactive Metal

    Mishimoto Akio, Ando Masaaki, Takahashi Makoto, Aritoshi Masatoshi, Ikeuchi Kenji

    Pre-Prints of the National Meeting of JWS   ( 66 )   222 - 223   2000.3

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  • Diffusion Bonding of Si_3 N_4 to Cu with Intermediate Layer of Ion-plated Active Metal Film

    Ando Masaaki, Ikeuchi Kenji, Takahashi Makoto, Nishimoto Akio, Aritoshi Masatoshi

    Pre-Prints of the National Meeting of JWS   ( 65 )   108 - 109   1999.9

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  • Influence of Heat Treatment on Interfacial Microstructure of SiC/Cu : Joint Friction-bonded with Nb Intermediate Layer

    Nishimoto Akio, Ando Masaaki, Takahashi Makoto, Aritoshi Masatoshi, Ikeuchi Kenji

    Pre-Prints of the National Meeting of JWS   ( 65 )   544 - 545   1999.9

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  • Formation of Interfacial Phases in SiC/Cu Joints Friction-bonded with Ti Intermediate Layer.

    Nishimoto Akio, Ando Masaaki, Takahashi Makoto, Aritoshi Masatoshi, Ikeuchi Kenji

    Pre-Prints of the National Meeting of JWS   ( 63 )   352 - 353   1998.9

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  • Interfacial Microstructure and Mechanical Properties of Si3N4/Cu Joint Friction-Bonded with Intermediate Layer.

    Ando Masaaki, Ikeuchi Kenji, Takahashi Makoto, Nishimoto Akio, Aritoshi Masatoshi

    Pre-Prints of the National Meeting of JWS   ( 63 )   350 - 351   1998.9

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  • Formation of TiC-Cu Double Layers at SiC/Cu Interface in Friction-Bonded Joint with Ti Intermediate Layer.

    Nishimoto Akio, Ando Masaaki, Takahashi Makoto, Aritoshi Masatoshi, Ikeuchi Kenji

    Pre-Prints of the National Meeting of JWS   ( 62 )   220 - 221   1998.3

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  • Interfacial Phases SiC-to-Cu Joints Friction-onded with Ti Ontermediate Layer

    Nishimoto Akio, Ando Masaaki, Takahashi Makoto, Aritoshi Masatoshi, Ikeuchi Kenji

    Pre-Prints of the National Meeting of JWS   ( 61 )   266 - 267   1997.9

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  • Interfacial microstructure and high temperature properties of SiC-to-Cu joint friction-bonded with Nb intermediate layer

    Nishimoto Akio, Ikeuchi Kenji, Ando Masaaki, Aritoshi Masatoshi, Ushio Masao

    Pre-Prints of the National Meeting of JWS   ( 59 )   240 - 241   1996.9

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  • Interfacial microstructure and high temperature properties of SiC-to-Cu joint friction-bonded with Ti intermediate layer

    Nishimoto Akio, Ikeuchi Kenji, Ando Masaaki, Aritoshi Masatoshi, Ushio Masao

    Pre-Prints of the National Meeting of JWS   ( 59 )   242 - 243   1996.9

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Presentations

  • メカニカルアロイング法と放電プラズマ焼結法による高エントロピー合金の調製

    刈本天斗, 西本明生

    日本鉄鋼協会第175回春季講演大会  2018.3 

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    Event date: 2018.3

    Venue:千葉工業大  

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  • 高温短時間プラズマ窒化処理における耐食性に及ぼすガス組成の影響

    年岡尚哉, 西本明生

    日本鉄鋼協会第175回春季講演大会  2018.3 

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    Event date: 2018.3

    Venue:千葉工業大  

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  • オーステナイト系ステンレス鋼のDLCコーティングの膜特性におよぼす単層および二重中間層の影響

    丸野英伸, 西本明生

    日本鉄鋼協会第175回春季講演大会  2018.3 

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    Event date: 2018.3

    Venue:千葉工業大  

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  • イオンプレーティング法による平滑性に優れたCr-N膜の形成と評価

    西本明生, 高坂健児(中外炉工業(株)), 古屋英二(中外炉工業(株))

    日本金属学会第162回春期講演大会  2018.3 

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    Event date: 2018.3

    Venue:千葉工業大  

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  • 中間層を導入したアルミニウム合金へのDLC膜成膜における密着性および耐久性評価

    丸野英伸, 西本明生

    日本金属学会第162回春期講演大会  2018.3 

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    Event date: 2018.3

    Venue:千葉工業大  

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  • メカニカルアロイング法と放電プラズマ焼結法によるCoCrFeMnNi系高エントロピー合金の作製

    刈本天斗, 西本明生

    第22回 関西大学先端科学技術シンポジウム  2018.1 

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    Event date: 2018.1

    Venue:関西大  

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  • メカニカルアロイング法と焼結法によるCrMnFeCoNiハイエントロピー合金の調製

    西本明生, 刈本天斗, 西 智尋

    第22回 関西大学先端科学技術シンポジウム  2018.1 

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    Event date: 2018.1

    Venue:関西大  

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  • アルミニウム合金へのDLC膜成膜における二重中間層の影響

    丸野英伸, 西本明生

    第22回 関西大学先端科学技術シンポジウム  2018.1 

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    Event date: 2018.1

    Venue:関西大  

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  • 高温短時間プラズマ窒化における窒化層形成

    年岡尚哉, 西本明生

    第22回 関西大学先端科学技術シンポジウム  2018.1 

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    Event date: 2018.1

    Venue:関西大  

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  • 放電プラズマ焼結法を応用した純チタンへの炭素およびホウ素の同時拡散浸透処理

    刈本天斗, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2017.12 

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    Event date: 2017.12

    Venue:神戸大  

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  • 放電プラズマ焼結法を応用した純チタンとマグネシウム合金の接合

    田中雄也, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2017.12 

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    Event date: 2017.12

    Venue:神戸大  

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  • アルミニウム合金のDLC膜の耐久性に及ぼす中間層の影響

    丸野英伸, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2017.12 

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    Event date: 2017.12

    Venue:神戸大  

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  • オーステナイト系ステンレス鋼の高温短時間プラズマ窒化で形成される窒化層の分析

    年岡尚哉, 西本明生

    第84回(2017年秋季)日本熱処理技術協会講演大会  2017.12 

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    Event date: 2017.12

    Venue:東北大  

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  • アミノベンゼンを用いた窒素ドープ DLC(N : C-H)膜の成膜と特性評価

    三木靖浩(奈良県産総センター), 高橋幸嗣(奈良県産総センター), 杉山友明(カイバラ), 杉原雅彦(栗田製作所), 西本明生

    第84回(2017年秋季)日本熱処理技術協会講演大会  2017.12 

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    Event date: 2017.12

    Venue:東北大  

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  • メカニカルアロイング法と焼結法による高エントロピー合金の作製

    刈本天斗, 西 智尋, 西本明生

    第84回(2017年秋季)日本熱処理技術協会講演大会  2017.12 

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    Event date: 2017.12

    Venue:東北大  

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  • グロー放電発光分光分析(GD-OES)

    西本明生

    日本熱処理技術協会2018年秋季(第84回)講演大会 討論会「熱処理材の特性向上に寄与する分析技術」  2017.12 

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    Event date: 2017.12

    Venue:東北大  

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  • アルミニウム合金への DLC 成膜における中間層の影響

    丸野英伸, 西本明生

    第84回(2017年秋季)日本熱処理技術協会講演大会  2017.12 

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    Event date: 2017.12

    Venue:東北大  

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  • 溶接工学

    西本明生

    関西経済連合会「モノづくり人材の育成・再教育に資する実践的プログラム「金属・材料工学」」  2017.11 

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    Event date: 2017.11

    Venue:中之島センタービル  

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  • Microstructure and Mechanical Property of Plasma-Nitrided CoCrFeMnNi High-Entropy Alloys

    A. Nishimoto, T. Fukube, T. Maruyama

    The 11th Asian-European International Conference on Plasma Surface Engineering (AEPSE2017)  2017.9 

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    Event date: 2017.9

    Venue:Jeju Island, Korea,  

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  • レーザ溶接によるAl合金とMg合金の異材接合

    松本幸樹, 西本明生, 永塚公彬(阪大接合研), 石川 武(総合車両製作所), 伊藤和博(阪大接合研), 塚本雅裕(阪大接合研), 中田一博(阪大接合研)

    溶接学会平成29年度秋季全国大会  2017.9 

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    Event date: 2017.9

    Venue:九州工業大  

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  • 放電プラズマ焼結法を応用した純チタン表面への炭化物およびホウ化物層の形成

    刈本天斗, 西本明生

    日本鉄鋼協会第174回秋季講演大会  2017.9 

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    Event date: 2017.9

    Venue:北海道大  

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  • プラズマ窒化とDLCコーティングの複合表面改質膜の密着性におよぼすArボンバード処理の影響

    丸野英伸, 西本明生

    日本鉄鋼協会第174回秋季講演大会  2017.9 

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    Event date: 2017.9

    Venue:北海道大  

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  • オーステナイト系ステンレス鋼のプラズマ窒化における窒化層の形成

    年岡尚哉, 西本明生

    日本鉄鋼協会第174回秋季講演大会  2017.9 

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    Event date: 2017.9

    Venue:北海道大  

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  • レーザ溶接によるAl合金とMg合金の異材接合

    松本幸樹, 西本明生, 永塚公彬(阪大接合研), 石川 武(総合車両製作所), 伊藤和博(阪大接合研), 塚本雅裕(阪大接合研), 中田一博(阪大接合研)

    日本金属学会第161回秋期講演大会  2017.9 

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    Event date: 2017.9

    Venue:北海道大  

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  • 高温短時間プラズマ窒化における窒化層形成

    年岡尚哉, 福部貴大, 西本明生

    第83回(2017年春季)日本熱処理技術協会講演大会  2017.6 

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    Event date: 2017.6

    Venue:東京工業大  

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  • 放電プラズマ焼結法を応用した純チタンへの浸炭浸硼処理

    刈本天斗, 西本明生

    第83回(2017年春季)日本熱処理技術協会講演大会  2017.6 

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    Event date: 2017.6

    Venue:東京工業大  

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  • プラズマ窒化とDLCコーティングの複合処理における表面改質膜の密着性におよぼすArボンバードの影響

    丸野英伸, 西本明生

    第83回(2017年春季)日本熱処理技術協会講演大会  2017.6 

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    Event date: 2017.6

    Venue:東京工業大  

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  • Nitriding and DLC Coating of Aluminum Alloy Using High Current Pressure-Gradient-Type Plasma Source

    A. Nishimoto, E. Furuya (Chugai Ro Co.,Ltd), K. Kousaka (Chugai Ro Co.,Ltd)

    44th International Conference on Metallurgical Coatings and Thin Films (ICMCTF)  2017.4 

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    Event date: 2017.4

    Venue:San Diego, USA  

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  • MA-SPS法を用いたfcc系ハイエントロピー合金の調製

    西 智尋, 西本明生

    第21回 関西大学先端科学技術シンポジウム  2017.1 

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    Event date: 2017.1

    Venue:関西大  

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  • CrMnFeCoNi系ハイエントロピー合金のプラズマ窒化

    西本明生, 福部貴大

    第21回 関西大学先端科学技術シンポジウム  2017.1 

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    Event date: 2017.1

    Venue:関西大  

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  • fcc系ハイエントロピー合金のプラズマ窒化処理

    福部貴大, 西本明生, 丸山 徹

    第21回 関西大学先端科学技術シンポジウム  2017.1 

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    Event date: 2017.1

    Venue:関西大  

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  • 放電プラズマ焼結法を用いたCrMnFeCoNi系ハイエントロピー合金の調製

    西本明生, 西 智尋

    第21回 関西大学先端科学技術シンポジウム  2017.1 

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    Event date: 2017.1

    Venue:関西大  

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  • 放電プラズマ焼結法を応用したチタンとマグネシウム合金の拡散接合

    大谷尚暉, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2016.12 

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    Event date: 2016.12

    Venue:大阪府大  

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  • 放電プラズマ焼結法を応用したチタンへのボロナイジング

    刈本天斗, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2016.12 

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    Event date: 2016.12

    Venue:大阪府大  

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  • 放電プラズマ焼結法を応用したチタン合金とオーステナイト系ステンレス鋼の拡散接合

    桑野晃匡, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2016.12 

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    Event date: 2016.12

    Venue:大阪府大  

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  • 放電プラズマ焼結法を応用しチタンへのホウ化物および炭化物の同時形成処理

    西 智尋, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2016.12 

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    Event date: 2016.12

    Venue:大阪府大  

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  • アクティブスクリーンプラズマ窒化の概要と最新の研究動向

    西本明生

    あいち産業科学技術総合センター 産業技術センター《材料表面改質トライアルコア研究会》「表面硬化処理・プラズマ窒化の最前線」  2016.12 

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    Event date: 2016.12

    Venue:あいち産業科学技術総合センター 産業技術センター  

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  • 圧力勾配型プラズマガンを用いたアルミニウム合金へのDLC成膜

    高坂健児(中外炉工業(株)), 古屋英二(中外炉工業(株)), 西本明生

    日本熱処理技術協会2016年秋季(第82回)講演大会  2016.12 

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    Event date: 2016.12

    Venue:名城大  

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  • 放電プラズマ焼結法を用いた高エントロピー合金の調製

    西 智尋, 西本明生

    日本熱処理技術協会2016年秋季(第82回)講演大会  2016.12 

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    Event date: 2016.12

    Venue:名城大  

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  • FCC系CoCrFeMnNi高エントロピー合金へのプラズマ窒化処理

    福部貴大, 清水渉太, 西本明生, 丸山 徹

    日本熱処理技術協会2016年秋季(第82回)講演大会  2016.12 

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    Event date: 2016.12

    Venue:名城大  

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  • Carburizing of Titanium Using Graphite Powder by Spark Plasma Sintering Technique

    C. Nishi, A. Nishimoto

    5th Asian Conference on Heat Treatment and Surface Engineering (5ACHTSE)  2016.11 

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    Event date: 2016.11

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  • Effect of Deposited Layer and Distance Between Screen and Sample During Active Screen Plasma Nitriding

    T. Fukube, T. Tanaka, A. Nishimoto

    5th Asian Conference on Heat Treatment and Surface Engineering (5ACHTSE)  2016.11 

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    Event date: 2016.11

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  • Aluminide Coating on Nickel-Base Superalloy by Spark Plasma Sintering Technique

    A. Nishimoto, K. Nakazawa

    5th Asian Conference on Heat Treatment and Surface Engineering (5ACHTSE)  2016.11 

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    Event date: 2016.11

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  • 溶接工学

    西本明生

    関西経済連合会「モノづくり人材の育成・再教育に資する実践的プログラム「金属・材料工学」」  2016.11 

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    Event date: 2016.11

    Venue:中之島センタービル  

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  • アクティブスクリーンプラズマ窒化法によるCu-Ti合金の表面改質

    西本明生, 木澤吉貴

    日本銅学会第56回講演大会  2016.10 

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    Event date: 2016.10

    Venue:東海大  

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  • オーステナイト系ステンレス鋼SUS316Lへの高温短時間プラズマ窒化処理によるS相の形成

    西本明生, 福部貴大

    日本金属学会2016年秋期(第159回)講演大会  2016.9 

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    Event date: 2016.9

    Venue:大阪大  

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  • 放電プラズマ焼結法を用いたCoCrMnFeNi系ハイエントロピー合金の調製

    西 智尋, 西本明生

    日本金属学会2016年秋期(第159回)講演大会  2016.9 

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    Event date: 2016.9

    Venue:大阪大  

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  • Simultaneous Formation of Carbide and Boride Layers on Titanium by Spark Plasma Sintering method

    C. Nishi, A. Nishimoto

    15th International Conference on Plasma Science Engineering (PSE 2016)  2016.9 

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    Event date: 2016.9

    Venue:Garmisch-Partenkirchen, Germany.  

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  • Effect of Distance Between a Screen and Sample on Deposited Layer During Active Screen Plasma Nitriding

    T. Fukube, A. Nishimoto

    15th International Conference on Plasma Science Engineering (PSE 2016)  2016.9 

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    Event date: 2016.9

    Venue:Garmisch-Partenkirchen, Germany.  

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  • Nitriding and diamond-like carbon coating of aluminum alloy using pressure-gradient-type plasma source

    A. Nishimoto, E. Furuya (Chugai Ro Co.,Ltd), K. Kousaka (Chugai Ro Co.,Ltd)

    15th International Conference on Plasma Science Engineering (PSE 2016)  2016.9 

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    Event date: 2016.9

    Venue:Garmisch-Partenkirchen, Germany.  

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  • プラズマ窒化法および放電プラズマ焼結法を応用したプラズマ表面硬化処理技術

    西本明生

    第9回トライボコーティング・ドライコーティング合同技術研究会・第47回ドライコーティング研究会  2016.7 

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    Event date: 2016.7

    Venue:板橋区立グリーンホール  

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  • Simultaneous Formation of Carbide and Boride Layers Using B4C Powder by Spark Plasma Sintering

    C. Nishi, A. Nishimoto

    11th International Symposium in Science and Technology at Kansai University (ISST 2016)  2016.7 

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    Event date: 2016.7

    Venue:Kansai University, Japan.  

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  • Deposited and Nitrided Layer During Active Screen Plasma Nitriding

    T. Fukube, T. Tanaka, A. Nishimoto

    11th International Symposium in Science and Technology at Kansai University (ISST 2016)  2016.7 

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    Event date: 2016.7

    Venue:Kansai University, Japan.  

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  • プラズマ窒化法および放電プラズマ焼結を応用した新しい表面改質

    西本明生

    MOBIO産学連携オフィス連続企画 テーマ別大学・高専合同研究シーズ発表会『金属(材料・加工)編』第1回  2016.6 

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    Event date: 2016.6

    Venue:クリエイション・コア東大阪  

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  • S相上に成膜したDLC膜の残留応力測定

    三木靖浩(奈良県産総センター), 西本明生

    第81回(平成28年春季)日本熱処理技術協会講演大会  2016.5 

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    Event date: 2016.5

    Venue:東京工業大  

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  • Active Screen Plasma Nitriding of Titanium Alloy Using Titanium Double Screen

    A. Nishimoto, K. Nakazawa

    16th International Symposium on Metallography (Metallography 2016),  2016.4 

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    Event date: 2016.4

    Venue:High Tatras, Slovakia.  

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  • 二段階アクティブスクリーンプラズマ窒化処理における窒化層の厚膜化

    福部貴大, 西本明生, 尾津侑耶

    日本金属学会2016年春期(第158回)講演大会  2016.3 

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    Event date: 2016.3

    Venue:東京理科大  

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  • 放電プラズマ焼結法を用いた純Tiへの同時浸炭浸ホウ処理

    西 智尋, 西本明生

    日本金属学会2016年春期(第158回)講演大会  2016.3 

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    Event date: 2016.3

    Venue:東京理科大  

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  • 関西大学 機能材料研究室における研究紹介 -プラズマ表面硬化処理を中心に-

    西本明生

    (一財)近畿高エネルギー加工技術研究所AMPI 第45回ドライコーティング研究会  2016.1 

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    Event date: 2016.1

    Venue:尼崎リサーチインキュベーションセンター  

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  • Compound Layer Coating on Titanium by Pulsed Electric-Current Sintering Technique

    C. Nishi, A. Nishimoto

    The 24th International Symposium on Processing and Fabrication of Advanced Materials (PFAM XXIV)  2015.12 

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    Event date: 2015.12

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  • Active Screen Plasma Nitriding Applied Bias Power to Both Screen and Sample

    T. Fukube, A. Nishimoto

    The 24th International Symposium on Processing and Fabrication of Advanced Materials (PFAM XXIV)  2015.12 

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    Event date: 2015.12

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  • 圧力勾配型プラズマガンを用いたアルミニウム合金へのプラズマ窒化

    古屋英二(中外炉工業(株)), 高坂健児(中外炉工業(株)), 西本明生

    第80回(平成27年秋季)日本熱処理技術協会講演大会  2015.12 

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    Event date: 2015.12

    Venue:関西大  

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  • プラズマ窒化処理における窒素供給物に関する考察

    福部貴大, 西本明生

    第80回(平成27年秋季)日本熱処理技術協会講演大会  2015.12 

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    Event date: 2015.12

    Venue:関西大  

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  • 放電プラズマ焼結法によるTi基板への化合物層の形成

    西 智尋, 西本明生

    第80回(平成27年秋季)日本熱処理技術協会講演大会  2015.12 

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    Event date: 2015.12

    Venue:関西大  

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  • 高温で短時間アクティブスクリーンプラズマ窒化処理を施したDLCの摩擦特性

    近藤浩弥, 西本明生

    第80回(平成27年秋季)日本熱処理技術協会講演大会  2015.12 

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    Event date: 2015.12

    Venue:関西大  

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  • 新規プラズマ窒化法によるTi合金の表面硬化

    西本明生, 中澤邦成

    軽金属学会第129回秋期大会  2015.11 

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    Event date: 2015.11

    Venue:日本大  

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  • 圧力勾配型プラズマガンを用いた低温プロセスによる平滑DLC膜の作製

    古屋英二(中外炉工業(株)), 高坂健児(中外炉工業(株)), 西本明生

    日本真空学会 2015年11月研究例会  2015.11 

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    Event date: 2015.11

    Venue:広島工業大  

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  • 溶接工学

    西本明生

    関西経済連合会「モノづくり人材の育成・再教育に資する実践的プログラム「金属・材料工学」」  2015.11 

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    Event date: 2015.11

    Venue:中之島センタービル  

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  • アクティブスクリーンプラズマ窒化処理

    西本明生

    神奈川県産業技術センター「神奈川県ものづくり技術交流会」『熱処理技術フォーラム』  2015.10 

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    Event date: 2015.10

    Venue:神奈川県産業技術センター  

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  • Effect of Surface Deposits on Nitriding Layer Formation of Active Screen Plasma Nitriding

    A. Nishimoto, T. Fukube, T. Tanaka

    The 10th Asian-European International Conference on Plasma Surface Engineering (AEPSE2015)  2015.9 

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    Event date: 2015.9

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  • SCM435に対するアクティブスクリーンプラズマ窒化がおよぼすDLC膜への影響

    和田晃英, 近藤浩弥, 西本明生

    日本鉄鋼協会第79回秋季講演大会  2015.9 

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    Event date: 2015.9

    Venue:九州大  

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  • ステンレス鋼におけるアクティブスクリーンプラズマ窒化前処理を施したDLCの摩擦特性

    近藤浩弥, 西本明生

    日本鉄鋼協会第79回秋季講演大会  2015.9 

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    Event date: 2015.9

    Venue:九州大  

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  • 放電プラズマ焼結法によるNi基超合金へのNiAlコーティング

    中澤 幹, 西本明生

    日本鉄鋼協会第79回秋季講演大会  2015.9 

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    Event date: 2015.9

    Venue:九州大  

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  • アクティブスクリーンプラズマ窒化処理における表面堆積物の窒化層への影響

    田中寿弥, 西本明生

    日本鉄鋼協会第79回秋季講演大会  2015.9 

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    Event date: 2015.9

    Venue:九州大  

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  • ステンレス鋼のアクティブスクリーンプラズマ窒化処理における窒化層形成

    福部貴大, 田中寿弥, 西本明生

    日本鉄鋼協会第79回秋季講演大会  2015.9 

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    Event date: 2015.9

    Venue:九州大  

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  • パルス通電焼結法によるTiC強化複合材料の作製

    西 智尋, 西本明生

    日本鉄鋼協会第79回秋季講演大会  2015.9 

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    Event date: 2015.9

    Venue:九州大  

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  • Residual Stress Measurement of Austenitic Stainless Steel Treated by Active Screen Plasma Nitriding

    H. Kondo, T. Tamiya, A. Nishimoto

    The 10th International Symposium in Science and Technology 2015 (ISST 2015)  2015.8 

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    Event date: 2015.8 - 2015.9

    Venue:Chulalongkorn University, Bangkok, Thailand.  

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  • Preparation of NiAl Coatings on Ni-based Superalloy by Spark Plasma Sintering

    K. Nakazawa, A. Nishimoto

    The 10th International Symposium in Science and Technology 2015 (ISST 2015)  2015.8 

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    Event date: 2015.8 - 2015.9

    Venue:Chulalongkorn University, Bangkok, Thailand.  

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  • Rapid Preparation of TiC-Reinforced Composites by Spark Plasma Sintering Technique

    C. Nishi, A. Nishimoto

    The 10th International Symposium in Science and Technology 2015 (ISST 2015)  2015.8 

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    Event date: 2015.8 - 2015.9

    Venue:Chulalongkorn University, Bangkok, Thailand.  

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  • アクティブスクリーンプラズマ窒化したオーステナイト系ステンレス鋼表面のX線残留応力測定

    三木靖浩(奈良県産総センター), 民谷隆純, 西本明生

    日本材料学会第49回X線材料強度に関するシンポジウム  2015.7 

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    Event date: 2015.7

    Venue:エル・おおさか  

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  • プラズマイオン注入・成膜(PBIID)法を用いて成膜したDLC膜の顕微ラマン分光法による残留応力測定

    三木靖浩(奈良県産総センター), 西本明生, 曽根 匠(朝日熱処理工業(株)), 荒木淑司((株)カイバラ)

    日本材料学会第49回X線材料強度に関するシンポジウム  2015.7 

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    Event date: 2015.7

    Venue:エル・おおさか  

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  • 大電流ホローカソード放電法を用いた高濃度プラズマ窒化

    古屋英二(中外炉工業(株), 高坂健児(中外炉工業(株)), 西本明生

    第79回(平成27年春季)日本熱処理技術協会講演大会  2015.6 

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    Event date: 2015.6

    Venue:東京工業大  

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  • アクティブスクリーンプラズマ窒化処理の窒化層形成における堆積物層の影響

    福部貴大, 田中寿弥, 西本明生

    第79回(平成27年春季)日本熱処理技術協会講演大会  2015.6 

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    Event date: 2015.6

    Venue:東京工業大  

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  • パルス通電焼結法を応用したTi-6Al-4V合金とオーステナイト系ステンレス鋼の接合

    桑野晃匡, 中澤 幹, 西本明生

    第79回(平成27年春季)日本熱処理技術協会講演大会  2015.6 

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    Event date: 2015.6

    Venue:東京工業大  

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  • アクティブスクリーンプラズマ窒化とDLCコーティングの複合処理が摩耗挙動に及ぼす影響

    和田晃英, 近藤浩弥, 民谷隆純, 西本明生

    第79回(平成27年春季)日本熱処理技術協会講演大会  2015.6 

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    Event date: 2015.6

    Venue:東京工業大  

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  • プラズマ窒化処理に関する最近の話題 -アクティブスクリーンプラズマ窒化を中心に-

    西本明生

    西部金属熱処理工業協同組合平成26年度第2回技術講習会「減圧雰囲気を活用した表面熱処理技術」  2015.3 

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    Event date: 2015.3

    Venue:大阪科学技術センター  

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  • アクティブスクリーンプラズマによる窒化

    西本明生

    第53回プラズマが拓くものづくり研究会(PLAM)「プラズマ技術講演会」  2015.3 

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    Event date: 2015.3

    Venue:公益財団法人名古屋産業振興公社プラズマ技術産業応用センター(PLACIA)  

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  • アクティブスクリーンプラズマ窒化について

    西本明生

    日本熱処理技術協会中部支部・技術講演会  2015.2 

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    Event date: 2015.2

    Venue:名城大学名駅サテライト  

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  • チタン合金のアクティブスクリーンプラズマ窒化

    木澤吉貴, 中澤邦成, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2014.12 

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    Event date: 2014.12

    Venue:関西大学  

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  • プラズマイオン注入・成膜(PBIID)法を用いて成膜したDLC膜の顕微ラマン分光法による残留応力測定

    三木靖浩(奈良県産総センター), 西本明生, 曽根 匠(朝日熱処理工業(株)), 荒木淑司((株)カイバラ)

    第78回(平成26年秋季)日本熱処理技術協会講演大会  2014.11 

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    Event date: 2014.11

    Venue:鹿児島大  

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  • 大電流ホローカソード放電法を用いた高真空近傍領域プラズマ窒化

    立松成基(中外炉工業(株)), 古屋英二(中外炉工業(株)), 西本明生

    第78回(平成26年秋季)日本熱処理技術協会講演大会  2014.11 

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    Event date: 2014.11

    Venue:鹿児島大  

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  • 大電流ホローカソード放電法を用いたDLC成膜及び膜評価

    立松成基(中外炉工業(株)), 古屋英二(中外炉工業(株)), 西本明生

    第78回(平成26年秋季)日本熱処理技術協会講演大会  2014.11 

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    Event date: 2014.11

    Venue:鹿児島大  

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  • アクティブスクリーンプラズマ窒化したオーステナイト系ステンレス鋼表面のX線残留応力測定

    民谷隆純, 三木靖浩(奈良県産総センター), 西本明生

    第78回(平成26年秋季)日本熱処理技術協会講演大会  2014.11 

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    Event date: 2014.11

    Venue:鹿児島大  

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  • パルス通電焼結法を応用したオーステナイト系ステンレス鋼へのNi-Al系金属間化合物の被覆処理

    中澤 幹, 小渕圭佑, 西本明生

    第78回(平成26年秋季)日本熱処理技術協会講演大会  2014.11 

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    Event date: 2014.11

    Venue:鹿児島大  

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  • 溶接工学

    西本明生

    関西経済連合会「モノづくり人材の育成・再教育に資する実践的プログラム「金属・材料工学」」  2014.11 

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    Event date: 2014.11

    Venue:中之島センタービル  

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  • オーステナイト系ステンレス鋼へのDLC成膜前処理としてのアクティブスクリーンプラズマ窒化の効果

    民谷隆純, 近藤浩弥, 天野 怜, 西本明生

    日本金属学会2014年秋期(第155回)講演大会  2014.9 

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    Event date: 2014.9

    Venue:名古屋大  

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  • Residual stress estimated from raman shift of G band in DLC films

    Y. Miki, A. Nishimoto, T. Sone, Y. Araki

    14th International Conference on Plasma Science Engineering (PSE 2014)  2014.9 

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    Event date: 2014.9

    Venue:Garmisch-Partenkirchen, Germany.  

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  • Effect of surface deposits from screen on active screen plasma nitriding

    A. Nishimoto, T. Matsukawa, T. Tanaka

    14th International Conference on Plasma Science Engineering (PSE 2014)  2014.9 

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    Event date: 2014.9

    Venue:Garmisch-Partenkirchen, Germany.  

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  • Effect of active screen plasma nitriding pretreatment on DLC coating

    H. Kondo, A. Nishimoto

    9th International Symposium in Science and Technology  2014.8 

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    Event date: 2014.8

    Venue:Cheng Shiu University  

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  • Investigation of deposits from screen during active screen plasma nitriding

    T. Tanaka, A. Nishimoto

    9th International Symposium in Science and Technology  2014.8 

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    Event date: 2014.8

    Venue:Cheng Shiu University  

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  • アクティブスクリーンプラズマ窒化におけるスクリーンからの堆積物の調査

    田中寿弥, 松川竜也, 西本明生

    第77回(平成26年春季)日本熱処理技術協会講演大会  2014.6 

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    Event date: 2014.6

    Venue:東京工業大  

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  • DLCコーティングの前処理としてのアクティブスクリーンプラズマ窒化の効果

    近藤浩弥, 民谷隆純, 天野 怜, 西本明生

    第77回(平成26年春季)日本熱処理技術協会講演大会  2014.6 

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    Event date: 2014.6

    Venue:東京工業大  

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  • チタン合金へのアクティブスクリーンプラズマ窒化

    中澤邦成, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2013.12 

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    Event date: 2013.12

    Venue:兵庫県立大  

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  • アクティブスクリーンプラズマ窒化処理を施したオーステナイト系ステンレス鋼へのDLCコーティング

    天野 怜, 民谷隆純, 西本明生

    第76回(平成25年秋季)日本熱処理技術協会講演大会  2013.11 

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    Event date: 2013.11

    Venue:名城大  

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  • 熱間押出し法による黄銅切削屑からのMnS添加鉛フリー快削黄銅の調製

    佐藤直樹, 竹田諒佑, 西本明生, 丸山 徹

    日本銅学会第53回講演大会  2013.11 

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    Event date: 2013.11

    Venue:関西大  

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  • 異材スクリーンを用いたアクティブスクリーンプラズマ窒化におけるN2/H2ガス比の影響

    西本明生, 中澤邦成, 松川竜也

    日本金属学会2013年秋期(第153回)講演大会  2013.9 

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    Event date: 2013.9

    Venue:金沢大  

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  • ステンレス鋼へのアクティブスクリーンプラズマ窒化とDLCコーティングの複合処理

    民谷隆純, 天野 怜, 西本明生

    日本金属学会2013年秋期(第153回)講演大会  2013.9 

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    Event date: 2013.9

    Venue:金沢大  

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  • Low-temperature Active-screen Plasma Nitriding of 17-4 PH Stainless Steel

    A. Nishimoto, K. Nagatsuka, K. Akamatsu

    8th Pacific Rim International Congress on Advanced Materials and Processing (PRICM-8)  2013.8 

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    Event date: 2013.8

    Venue:Hawaii, USA  

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  • Residual Stress Measurement in DLC Films using Raman Microprobe Spectroscopy

    Y. Miki, A. Nishimoto, T. Sone, Y. Araki

    9th Asian-European International Conference on Plasma Surface Engineering (AEPSE2013)  2013.8 

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    Event date: 2013.8

    Venue:済州島, 韓国  

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  • Duplex Treatment of Active Screen Plasma Nitriding and DLC Coating

    A. Nishimoto, R. Amano

    9th Asian-European International Conference on Plasma Surface Engineering (AEPSE2013),  2013.8 

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    Event date: 2013.8

    Venue:済州島, 韓国  

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  • 顕微ラマン分光法を用いたDLC膜の残留応力測定

    三木靖浩, 西本明生, 曽根 匠, 荒木淑司

    日本材料学会第47回X線材料強度に関するシンポジウム  2013.7 

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    Event date: 2013.7

    Venue:国立オリンピック記念青少年総合センター  

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  • アクティブスクリーンプラズマ窒化を応用した高硬度な非磁性鋼材の作製

    松川竜也, 西本明生, 植田 優, 金山信幸

    第75回(平成25年春季)日本熱処理技術協会講演大会  2013.6 

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    Event date: 2013.6

    Venue:東京工業大  

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  • チタンダブルスクリーンを用いたアクティブスクリーンプラズマ窒化におけるN2/H2ガス比の影響

    中澤邦成, 松川竜也, 西本明生

    第75回(平成25年春季)日本熱処理技術協会講演大会  2013.6 

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    Event date: 2013.6

    Venue:東京工業大  

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  • Effect of Sample Mount on Active Screen Plasma Duplex Processing

    A. Nishimoto, K. Nakazawa

    15th International Symposium on Metallography (Metallography 2013)  2013.4 

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    Event date: 2013.4

    Venue:High Tatras, Slovakia  

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  • Pulsed Electric Current Bonding of Tungsten to Titanium

    K. Kobuchi, A. Nishimoto

    15th International Symposium on Metallography (Metallography 2013)  2013.4 

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    Event date: 2013.4

    Venue:High Tatras, Slovakia  

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  • パルス通電焼結法によるチタンとタングステンの接合

    小渕圭佑, 西本明生

    軽金属学会関西支部 若手研究者・院生による研究発表会  2012.12 

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    Event date: 2012.12

    Venue:大阪工業大  

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  • アクティブスクリーンプラズマ窒化処理技術

    西本明生

    第74回(平成24年秋季)日本熱処理技術協会講演大会  2012.11 

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    Event date: 2012.11

    Venue:関西大  

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  • 熱間押出し法による黄銅切削屑からの直接固化成形技術の開発

    佐藤直樹, 竹田諒佑, 西本明生, 赤松勝也

    第74回(平成24年秋季)日本熱処理技術協会講演大会  2012.11 

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    Event date: 2012.11

    Venue:関西大  

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  • フッ化物フリー賦与剤を用いたCrおよびSiの複合拡散浸透処理によるオーステナイト系ステンレス鋼の表面改質

    藤村 宣, 西本明生, 赤松勝也

    第74回(平成24年秋季)日本熱処理技術協会講演大会  2012.11 

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    Event date: 2012.11

    Venue:関西大  

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  • アクティブスクリーンプラズマ窒化とDLCコーティングの複合処理

    天野 怜, 堀井佑記, 西本明生

    第74回(平成24年秋季)日本熱処理技術協会講演大会  2012.11 

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    Event date: 2012.11

    Venue:関西大  

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  • 有機性廃棄物の炭化処理と炭化処理材の固体浸炭剤への応用

    温井淳太, 西本明生, 赤松勝也

    第74回(平成24年秋季)日本熱処理技術協会講演大会  2012.11 

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    Event date: 2012.11

    Venue:関西大  

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  • アクティブスクリーンプラズマ窒化法を応用した複合処理における試料台材質の影響

    中澤邦成, 二井裕瑛, 西本明生

    第74回(平成24年秋季)日本熱処理技術協会講演大会  2012.11 

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    Event date: 2012.11

    Venue:関西大  

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  • フッ化物フリー賦与剤を用いた複合拡散浸透処理によるオーステナイト系ステンレス鋼の表面改質

    藤村 宣, 西本明生

    日本金属学会2012年秋期(第151回)講演大会  2012.9 

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    Event date: 2012.9

    Venue:愛媛大  

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  • 窒素雰囲気中で炭化処理した有機物を利用した低炭素鋼の固体浸炭処理

    温井淳太, 西本明生

    日本金属学会2012年秋期(第151回)講演大会  2012.9 

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    Event date: 2012.9

    Venue:愛媛大  

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  • Effect of Screen Open Area on Active Screen Plasma Nitriding Response

    A. Nishimoto, T. Matsukawa, H. Nii

    13th International Conference on Plasma Science Engineering (PSE 2012)  2012.9 

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    Event date: 2012.9

    Venue:Garmisch-Partenkirchen, Germany  

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  • Simultaneous Diffusion Coating of Cr and Si on Stainless Steel using Fluoride-Free Activator

    H. Fujimura, A. Nishimoto

    7th International Symposium in Science and Technology  2012.8 

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    Event date: 2012.8

    Venue:Penang, Malaysia  

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  • Effect of Screen Open Area on Active Screen Plasma Nitriding Behavior of 316 Austenitic Stainless Steel

    A. Nishimoto, T. Matsukawa

    7th International Symposium in Science and Technology  2012.8 

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    Event date: 2012.8

    Venue:Penang, Malaysia  

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  • Surface Modification of Low Carbon Steel by Solid-Carburizing Process with Carbonized Organics in Nitrogen Atmosphere

    J. Nukui, A. Nishimoto

    7th International Symposium in Science and Technology  2012.8 

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    Event date: 2012.8

    Venue:Penang, Malaysia  

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  • Simultaneous Formation Process of TiN Layer and Nitrogen Diffusion Layer by Active Screen Plasma Nitriding

    K. Nakazawa, A. Nishimoto

    7th International Symposium in Science and Technology  2012.8 

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    Event date: 2012.8

    Venue:Penang, Malaysia  

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  • 新しい窒化法 ─アクティブスクリーンプラズマ窒化─

    西本明生

    第73回日本熱処理技術協会春季講演大会  2012.6 

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    Event date: 2012.6

    Venue:東京工業大学  

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  • アクティブスクリーンプラズマ窒化におよぼすスクリーンの開孔率の影響

    松川竜也 (D), 西本明生

    第73回日本熱処理技術協会春季講演大会  2012.6 

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    Event date: 2012.6

    Venue:東京工業大学  

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  • パルス通電焼結法を応用したチタンとタングステンの接合

    小渕圭佑 (D), 八木治樹 (D), 西本明生

    第73回日本熱処理技術協会春季講演大会  2012.6 

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    Venue:東京工業大学  

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  • フッ化物フリー賦与剤を用いた拡散浸透処理によるステンレス鋼の諸特性向上

    藤村 宣 (D), 西本明生

    日本金属学会2011年秋期(第149回)大会  2011.11 

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    Event date: 2011.11

    Venue:沖縄コンベンションセンター  

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  • 熱間押出し法による黄銅切削屑からの直接連続固化成形技術の開発

    竹田諒佑 (D), 堀川 俊 (D), 西本明生

    日本金属学会2011年秋期(第149回)大会  2011.11 

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    Event date: 2011.11

    Venue:沖縄コンベンションセンター  

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  • 窒素雰囲気中で炭化処理した有機物を利用した固体浸炭処理

    温井淳太 (D), 西本明生

    日本金属学会2011年秋期(第149回)大会  2011.11 

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    Event date: 2011.11

    Venue:沖縄コンベンションセンター  

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  • ADIP法で蒸着したTiN薄膜の赤外線反射特性に及ぼす酸化の影響

    堀井佑記 (D), 小山慶光 (D), 西本明生, 杉本隆史

    日本金属学会2011年秋期(第149回)大会  2011.11 

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    Event date: 2011.11

    Venue:沖縄コンベンションセンター  

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  • パルス通電焼結法を応用したオーステナイト系ステンレス鋼へのTi-Al系金属間化合物の被覆処理

    八木治樹 (D), 西本明生

    日本金属学会2011年秋期(第149回)大会  2011.11 

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    Event date: 2011.11

    Venue:沖縄コンベンションセンター  

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  • アクティブスクリーンプラズマ窒化によるフェライト系ステンレス鋼の表面改質

    二井裕瑛 (D), 西本明生

    日本金属学会2011年秋期(第149回)大会  2011.11 

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    Event date: 2011.11

    Venue:沖縄コンベンションセンター  

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  • Preparation of Homogeneous Fe-Al Intermetallic Compound Sheet from Fe and Al Foils by Spark Plasma Sintering

    A. Nishimoto, D. Kamitani

    IFHTSE 19th International Congress 2011  2011.10 

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    Event date: 2011.10

    Venue:Glasgow, United Kingdom  

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  • Simultaneous Duplex Process of Nitriding and TiN Coating by Active Screen Plasma Nitriding

    A. Nishimoto, H. Nii, R. Narita, K. Akamatsu

    8th Asian-European International Conference on Plasma Surface Engineering (AEPSE 2011)  2011.9 

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    Event date: 2011.9

    Venue:Dalian, China  

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  • Formation of Thick Intermetallic Compound Layer on Stainless Steel by Spark Plasma Sintering

    A. Nishimoto

    6th International Symposium in Science and Technology at Kansai University 2011  2011.8 

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    Event date: 2011.8

    Venue:Osaka, Japan  

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  • Solid-carburizing Process with Carbonized Organics in Nitrogen Atmosphere

    J. Nukui, A. Nishimoto

    6th International Symposium in Science and Technology at Kansai University 2011,  2011.8 

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    Event date: 2011.8

    Venue:Osaka, Japan  

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  • Active Screen Plasma Nitriding of Ferritic Stainless Steel

    H. Nii, A. Nishimoto

    6th International Symposium in Science and Technology at Kansai University 2011  2011.8 

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    Event date: 2011.8

    Venue:Osaka, Japan  

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  • Chromizing-Siliconizing Coating on Stainless Steel by Pack Cementation using Fluoride Free Activator

    H. Fujimura, A. Nishimoto

    6th International Symposium in Science and Technology at Kansai University 2011,  2011.8 

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    Event date: 2011.8

    Venue:Osaka, Japan  

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  • フッ化物フリー賦与剤を用いたステンレス鋼へのCrおよびSiの複合拡散浸透処理

    藤村 宣 (D), 西本明生, 赤松勝也

    第71回日本熱処理技術協会講演大会  2011.5 

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    Event date: 2011.5

    Venue:東京工業大学  

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  • 窒素雰囲気中で炭化処理した有機物による固体浸炭処理

    温井淳太 (D), 西本明生, 赤松勝也

    第71回日本熱処理技術協会講演大会  2011.5 

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    Event date: 2011.5

    Venue:東京工業大学  

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  • フェライト系ステンレス鋼のアクティブスクリーンプラズマ窒化処理

    二井裕瑛 (D), 西本明生, 赤松勝也

    第71回日本熱処理技術協会講演大会  2011.5 

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    Event date: 2011.5

    Venue:東京工業大学  

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  • アクティブスクリーンプラズマ窒化法を応用したTiNと窒素拡散層の同時形成プロセス

    西本明生, 二井裕瑛 (D), 赤松勝也

    第71回日本熱処理技術協会講演大会  2011.5 

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    Venue:東京工業大学  

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  • 熱間押出し法を応用した鉛フリー快削黄銅棒材の調製

    堀川 俊 D, 遠藤康利 D, 西澤新平 D, 西本明生, 赤松勝也

    第70回日本熱処理技術協会講演大会  2010.11 

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    Event date: 2010.11

    Venue:名城大  

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  • アクティブスクリーンプラズマ窒化処理に及ぼすガス圧力の影響

    二井裕瑛 D, 成田亮太 D, 西本明生, 赤松勝也

    第70回日本熱処理技術協会講演大会  2010.11 

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    Venue:名城大  

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  • Microstructure of Cr3Si Coatings on Austenitic Stainless Steel by Spark Plasma Sintering

    A. Nishimoto, A. Miyata D, K. Akamatsu

    Visual-JW2010  2010.11 

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    Event date: 2010.11

    Venue:Osaka, Japan  

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  • パルス通電焼結法を応用したオーステナイト系ステンレス鋼へのCr-Si 系金属間化合物皮膜の調製とその性質

    宮田淳弘 D, 西本明生

    日本金属学会2010年秋期(第147回)大会  2010.9 

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    Event date: 2010.9

    Venue:北海道大  

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  • アクティブスクリーンプラズマ窒化処理におよぼすスクリーンと試料の間隔および圧力の影響

    二井裕瑛 D, 西本明生

    日本金属学会2010年秋期(第147回)大会  2010.9 

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    Event date: 2010.9

    Venue:北海道大  

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  • Effect of Screen Material on Active Screen Plasma Nitriding Response

    A. Nishimoto, K. Nagatsuka D, R. Narita D, K. Akamatsu

    11th International Conference on Plasma Surface Engineering (PSE 2010)  2010.9 

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    Event date: 2010.9

    Venue:Garmisch-Partenkirchen, Germany  

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  • Coating Process of Cr-Si Intermetallic Compound on Austenitic Stainless Steel by Spark Plasma Sintering

    A. Miyata D, A. Nishimoto

    5th International Symposium in Science and Technology at Cheng Shiu University 2010  2010.8 

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    Event date: 2010.8

    Venue:高雄, 台湾  

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  • Surface Hardening of Stainless Steel by Active Screen Plasma Nitriding

    A. Nishimoto, K. Akamatsu

    5th International Symposium in Science and Technology at Cheng Shiu University 2010  2010.8 

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    Event date: 2010.8

    Venue:高雄, 台湾  

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  • Effect of Pre-Deforming on Plasma Nitriding Response of 304 Stainless Steel

    A. Nishimoto, K. Akamatsu

    7th Pacific Rim International Conference on Advanced Materials and Processing  2010.8 

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    Event date: 2010.8

    Venue:Cairns, Australia  

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  • Effect of Gas Pressure on Active Screen Plasma Nitriding Response

    A. Nishimoto, K. Nagatsuka, R. Narita, H. Nii, K. Akamatsu

    18th International Federation for Heat Treatment and Surface Engineering (IFHTSE) Congress  2010.7 

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    Event date: 2010.7

    Venue:Rio de Janeiro, Brazil  

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  • パルス通電焼結法を応用したAZ31マグネシウム合金とA6061アルミニウム合金の接合

    杉浦良憲, 西本明生, 赤松勝也

    軽金属学会関西支部「若手研究者・院生による研究発表会」  2010.1 

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    Event date: 2010.1

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  • パルス通電焼結法による低熱膨張係数Al-Si合金の調製

    谷口洋平, 西本明生, 赤松勝也

    軽金属学会関西支部「若手研究者・院生による研究発表会」  2010.1 

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  • 有機物の低温炭化処理により得られた炭化剤を応用した固体浸炭処理

    古川雄規, 西澤新平, 中畑憲一郎, 西本明生, 赤松勝也

    第68回日本熱処理技術協会講演大会  2009.12 

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  • 析出硬化系ステンレス鋼のアクティブスクリーンプラズマ窒化処理

    永塚公彬, 成田亮太, 神谷太輔, 西本明生, 赤松勝也

    第68回日本熱処理技術協会講演大会  2009.12 

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  • パルス通電焼結法を応用した低熱膨張係数Al-Si合金の開発

    谷口洋平, 杉浦良憲, 長谷川晋平, 西本明生, 赤松勝也

    第68回日本熱処理技術協会講演大会  2009.12 

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  • 回転炉体法を応用したCrとSiの同時拡散浸透処理

    畑本拓哉, 遠藤康利, 宮田淳弘, 西本明生, 赤松勝也

    第68回日本熱処理技術協会講演大会  2009.12 

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  • Effect of Pre-Deforming on Plasma Nitriding Properties of Austenitic Stainless Steel

    Akio Nishimoto, Katsuya Akamatsu

    The 4th Asian Conference on Heat Treatment and Surface Engineering  2009.10 

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    Event date: 2009.10

    Venue:Beijing, China  

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  • パルス通電圧接法による純Al, Feシート材からのFe-Al系金属間化合物の調製

    赤松勝也, 西本明生, 杉浦良憲

    軽金属学会関西支部 若手研究者・院生による研究発表会  2009.1 

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  • アクティブスクリーンプラズマ窒化処理におよぼすスクリーンの材質の影響

    赤松勝也, 西本明生, 永塚公彬, 成田亮太, 宝田伸彦

    日本鉄鋼協会・日本金属学会関西支部 材料開発研究会 平成20年度第3回研究会  2008.12 

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    Event date: 2008.12

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  • パルス通電圧接法による純Fe, A1積層材からのFe-Al系金属間化合物の調製

    赤松勝也, 西本明生, 杉浦良憲, 神谷太輔

    日本鉄鋼協会・日本金属学会関西支部 材料開発研究会 平成20年度第3回研究会  2008.12 

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  • ステンレス鋼の低温プラズマ窒化処理特性におよぼすサブゼロ処理の影響

    赤松勝也, 西本明生, 和田遼介, 西澤新平, 畑本拓哉

    日本鉄鋼協会・日本金属学会関西支部 材料開発研究会 平成20年度第3回研究会  2008.12 

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  • 粉末冶金法を応用した鉛フリー快削黄銅の開発とその特性

    赤松勝也, 西本明生, 中畑憲一郎, 上野容平

    日本鉄鋼協会・日本金属学会関西支部 材料開発研究会 平成20年度第3回研究会  2008.12 

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  • メカニカルアロイング法を応用した耐熱性Cu基合金の開発

    赤松勝也, 西本明生, 中尾和祺, 長谷川晋平, 岩見寿光

    日本鉄鋼協会・日本金属学会関西支部 材料開発研究会 平成20年度第3回研究会  2008.12 

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  • 金属材料の表面改質とその応用

    西本 明生

    東大阪市立産業技術支援センター「ものづくり開発研究会」  2008.8 

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  • 新しい窒化法/アクティブスクリーンプラズマ窒化について

    西本 明生

    トライボコーティング・ドライコーティング合同技術研究会  2008.7 

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  • プラズマ窒化、拡散浸透処理

    西本 明生

    関西私立大学 産学連携技術セミナー2008  2008.7 

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  • アクティブスクリーン型間接プラズマ窒化処理法

    赤松勝也, 西本明生, 永塚公彬, 杉浦良憲, 和田遼介

    第66回日本熱処理技術協会講演大会  2008 

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  • 熱間押出し法を応用した鉛フリー快削黄銅の固化成形法と性質

    赤松勝也, 西本明生, 中畑憲一郎, 長谷川晋平, 吉川嘉宥

    第66回日本熱処理技術協会講演大会  2008 

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  • プラズマ窒化、拡散浸透処理

    西本 明生

    関西大学 連続セミナー「ものづくり基盤技術」-ニーズに応える材料開発-(第3回)  2007.2 

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    Event date: 2007.2

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  • 材料の表面改質技術の開発

    春名匠, 市井一男, 西本明生

    2006年度 関西大学連続セミナー ものづくり基盤技術 ニーズに応える材料開発  2007.2 

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    Event date: 2007.2

    Venue:クリエイションコア東大阪  

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  • 回転電極法によるAl-高Si系合金粉末の製造と焼結材の性質

    赤松勝也, 西本明生, 杉誠太郎

    軽金属学会関西支部平成18年度第4回研究会  2007 

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  • オーステナイト系ステンレス鋼の低温プラズマ窒化処理

    赤松勝也, 西本明生, 澤田康弘, 和田遼介

    関西大学先端科学技術推進機構第11回先端科学技術シンポジウム  2007 

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  • アクティブスクリーン法による鉄鋼材料のプラズマ窒化

    赤松勝也, 西本明生, 徳田篤史

    関西大学先端科学技術推進機構第11回先端科学技術シンポジウム  2007 

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  • パルス通電焼結法を応用したAl-Si合金皮膜の調製

    赤松勝也, 西本明生, 金澤大吾

    関西大学先端科学技術推進機構第11回先端科学技術シンポジウム  2007 

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  • 拡散浸透法を応用した高機能皮膜の創製

    赤松勝也, 西本明生, 本屋敷健

    関西大学先端科学技術推進機構第11回先端科学技術シンポジウム  2007 

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  • 押出法を応用した黄銅切削屑の固化成形

    澤田康弘, 西本明生, 赤松勝也, 吉川嘉宥

    日本熱処理技術協会第64回学術講演大会  2007 

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  • 低熱膨張係数を有するAl-高Si合金の調製

    赤松勝也, 西本明生, 澤田康弘, 和田遼介

    日本熱処理技術協会第65回秋季講演大会  2007 

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  • 押出し法を応用した6-4黄銅切削屑の固化成形

    赤松勝也, 西本明生, 澤田康弘

    関西大学先端科学技術推進機構第11回先端科学技術シンポジウム  2007 

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  • 回転電極法によるコルソン系銅合金の粉末化と焼結材の性質

    赤松勝也, 西本明生, 杉誠太郎

    関西大学先端科学技術推進機構第11回先端科学技術シンポジウム  2007 

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  • オーステナイト系ステンレス鋼のプラズマ窒化特性に及ぼす前処理としての塑性加工の影響

    和田遼介, 徳田篤史, 西本明生, 赤松勝也

    日本熱処理技術協会第64回学術講演大会  2007 

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  • 押出し法を応用した6‐4黄銅切削屑の固化成形

    赤松勝也, 西本明生, 澤田康弘, 吉川嘉宥

    日本金属学会第140回大会  2007 

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    Event date: 2007

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  • 回転電極法によるAl-高Si系合金粉末の製造と焼結材の性質

    赤松勝也, 西本明生, 杉誠太郎

    関西大学先端科学技術推進機構第11回先端科学技術シンポジウム  2007 

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    Event date: 2007

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  • Preparation of Fe3Al Coatings on Austenitic Stainless Steel by Pulsed Electric-Current Sintering

    A.Nishimoto, K.Akamatsu

    15th IFHTSE Congress  2006.9 

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    Event date: 2006.9

    Venue:Vienna, Austria  

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  • 塑性加工を行ったオーステナイト系ステンレス鋼の低温プラズマ窒化処理

    赤松勝也, 西本明生, 徳田篤史

    日本鉄鋼協会日本金属学会関西支部, 鉄鋼プロセス研究会  2006 

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    Event date: 2006

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  • 積層圧延接合法によるFe-Al系金属間化合物の調製

    赤松勝也, 西本明生

    日本金属学会第138回大会  2006 

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    Event date: 2006

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  • プラズマ窒化、拡散浸透処理等による各種鉄鋼材料の表面改質

    西本 明生

    クリエイション・コア東大阪 産学連携技術フォーラム第1回「表面処理技術」  2005.9 

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    Event date: 2005.9

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  • 回転電極法によるコルソン系銅合金の粉末化と焼結材の性質

    赤松勝也, 小林 武, 西本明生, 丸山 徹, 中尾和祺, 神村武志

    第45回銅及び銅合金技術研究会講演大会  2005 

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    Event date: 2005

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  • パルス通電焼結法によるSUS304へのFe-Al系金属間化合物皮膜の調製とその性質

    赤松勝也, 西本明生, 阪口 雅, 巻野勇喜雄

    日本熱処理技術協会第61回大会  2005 

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    Event date: 2005

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  • プラズマによる間接窒化処理について

    赤松勝也, 西本明生, 中堂了介, 金澤大吾

    日本熱処理技術協会第61回大会  2005 

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    Event date: 2005

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  • Cu-Ni-Si合金の溶射皮膜組織

    松原竹志, 赤木健一, 丸山 徹, 西本明生, 赤松勝也, 中尾和祺, 小林 武

    日本溶射協会第82回全国講演大会  2005 

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    Event date: 2005

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  • パルス通電プロセスにおけるシリカ/カーボン間の界面現象

    赤松勝也, 西本明生

    高温学会平成17年度秋季総合学術講演会  2005 

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    Event date: 2005

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  • パルス大電流通電加熱法によるナノアルミナ粉体の焼結特性

    赤松勝也, 西本明生, 巻野勇喜雄, 阪口 雅, 寺田 潤

    粉体粉末冶金協会平成17年度春季大会  2005 

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    Event date: 2005

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  • 回転電極法による高濃度銅合金粉末の調製とその性質

    赤松勝也, 西本明生, 神村武志, 中堂了介, 杉 誠太郎

    日本熱処理技術協会第60回大会  2005 

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    Event date: 2005

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  • シリカ/カーボン界面におけるカーボンの移動からみたパルス通電現象について

    赤松勝也, 西本明生, 徳田篤史, 本屋敷 健

    粉体粉末冶金協会平成17年度秋季講演大会  2005 

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    Event date: 2005

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  • 積層圧延接合法によるFe-Al系金属間化合物の調製

    赤松勝也, 西本明生, 平城智博

    日本熱処理技術協会第58回大会  2004 

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    Event date: 2004

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  • 回転電極法による高濃度銅合金粉末の製造とその性質

    赤松勝也, 西本明生, 神村武志, 戸田義久, 阪口 雅, 中堂了介

    日本鉄鋼協会・日本金属学会関西支部・材料開発研究会平成16年度第4回研究会  2004 

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    Event date: 2004

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  • MA-SPSプロセスによるSiC粒子分散Al基複合材料の調製

    西本明生, 中尾和祺, 赤松勝也

    日本熱処理技術協会  2001.5 

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    Event date: 2001.5

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  • 粉体状防炭剤を応用した二,三の表面硬化処理における部分硬化防止

    赤松勝也, 中尾和祺, 西本明生, 土肥幸生, 伊藤興一

    日本熱処理技術協会  2001.5 

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    Event date: 2001.5

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  • S Phase Formation of Some Austenitic Stainless Steels by Ion-nitriding

    A.Nishimoto, K.Ichii, K.Nakao, M.Takai, K.Akamatsu

    International Current Status Seminar Thermochemical Surface Engineering of Stainless Steels  2000.11 

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    Event date: 2000.11

    Venue:Kansai University, Osaka, Japan  

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  • 珪素およびクロムの拡散浸透処理について

    赤松勝也, 中尾和祺, 西本明生, 矢野吉章, 奥出智重

    日本金属学会  2000.10 

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    Event date: 2000.10

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Industrial property rights

  • 機械部品

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    Application no:特願2019-125268 

    Announcement no:特開2021-11598  Date announced:2021.3

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  • 機械部品

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    Application no:特願2019-125517 

    Announcement no:特開2021-011603  Date announced:2021.2

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Awards

  • 粉生熱技術振興賞

    2022.11   (公財)谷川熱技術振興基金  

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    Country:Japan

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  • 産学連携賞

    2022.5   関西大学科学技術振興会  

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    Country:Japan

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  • 産学連携賞

    2019.5   関西大学科学技術振興会  

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    Country:Japan

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  • Techinical Award

    2012.6   Japan Society for Heat Treatment  

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    Country:Japan

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  • JSHT Best Paper Award

    2002.5   Japan Society for Heat Treatment  

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    Country:Japan

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  • JSHT Best Paper Award

    2001.5   Japan Society for Heat Treatment  

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    Country:Japan

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Research Projects

  • Fuctionality of P/M high-entropy alloys by active screen plasma nitriding

    Grant number:21K04723  2021.4 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

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    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

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  • Progressive research on innert anode for Li and Mg electrolysis in molten chloride

    Grant number:26289282  2014.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Takenaka Toshihide

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    Grant amount:\16250000 ( Direct Cost: \12500000 、 Indirect Cost:\3750000 )

    Innovative material of inert anode for Li and Mg electrolysis in molten chloride containing oxide ions of impurity-level was studied. The anodic dissolution of carbon/graphite was hardly prevented, and nickel ferrite was dissolved by immersion. A TiO2 layer was not formed on Mo-Ti or Mo-Ti-Ru alloy, and their dissolution was rarely inhibited. The anodic behaviors of SiC strongly depended on the existence of oxide ions in melt, and a SiO2 layer was formed on its surface by electrolysis. The formed SiO2 seemed stable even under Cl2 gas generation, and its anodic dissolution was considerably lessened. The anodic behavior of MoSi2 resembled that of SiC. These results indicate that SiC and MoSi2 are potential as inert anode material in molten chloride containing oxide ions. The formation of a homogeneous and coherent SiO2 layer with better electric conductivity should be studied to apply them as a practical inert anode.

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  • Surface hardening treatment of light metal materials using active screen plasma nitriding

    Grant number:24560896  2012.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    NISHIMOTO Akio, MATSUKAWA Tatsuya, NAKAZAWA Kunishige, KIZAWA Yoshitaka, TANAKA Toshiya

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    Grant amount:\5070000 ( Direct Cost: \3900000 、 Indirect Cost:\1170000 )

    Ti-6Al-4V alloy was active screen plasma nitrided using a double titanium screen under various process conditions. The ASPN process variables included treatment temperature (873 K), treatment time (1, 5 and 25 h) and gas mixture (75/25 of N2/H2) under 200 Pa pressure. Cross-sectional microstructure and GDOES results demonstrated that a Ti nitride compound layer consisting of TiN followed by Ti2N was formed on top of the surface. The surface hardness of the nitrided sample showed 1300 HV. Friction wear test results indicated that the friction resistance of the ASPN treated sample for 25 h improved considerably compared with the untreated sample.

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  • アクティブスクリーンプラズマ熱処理技術を応用したハイブリッド硬質皮膜の同時形成プロセスの開発(JST・A-STEP)

    2011 - 2012

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    Grant type:Competitive

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  • Collaboration Research with Joining and Welding Research Institute (JWRI), Osaka University

    2001

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    Grant type:Competitive

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  • Fundamental and applied research of S phase

    Grant number:10045054  1998 - 2000

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B).

    AKAMATSU Katsuya, NISHIMOTO Akio, ICHII Kazuo, TAKAI Masahiro

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    Grant amount:\7000000 ( Direct Cost: \7000000 )

    1.Introduction :
    The S phase of M_4N type nitride found from the research of the processing of the plasma nitriding of the stainless steels in 1986 has been being researched internationally from the possession of the character of a high corrosion resistance and high hardness.
    To correct current results of the research of S phase, to collect latest research information on S phase and to hold an international seminar in Kansai University, to make the result public widely, and to contribute to pubic development of the 21^<st> century, this research was done as The Birmingham University in Britain which was the agreement university of Kansai University and an intercollegiate cooperation research.
    2.Document investigation on S phase :
    Since the S phase generates when stainless steels are chiefly in ion-nitriding. Document investigation was done on[Metals Abstracts]as the key words for[Ion Nitriding]and [Austenitic Stainless Steel]from 1977 to 2000. 157 papers(only English)were resulted as the theses related to the above-mentioned. They were contributed to following SS2000 Proceedings.(publication from The Institute of Materials)
    3.Research Investigation on S phase :
    The under-mentioned results was announced to SS2000, and each thesis was contributed to Proceedings SS2000.
    1) Effect of Mechanical Pre-Treatment on the Formation of S phase in Plasma Nitrided 304 Austenitic Stainless Steel.
    2) "S" phase formation of Some Austenitic Stainless Steels by Ion-Nitriding.
    3) Nitriding of Stainless Steel Using High Power YAG laser.
    4. Domestic and International seminar on SS2000 :
    There were the participates of 61 persons(47 country persons and 14 foreigner), and abstracts papers of 25(9 country and 24 foreign countries)on this seminar. Moreover, a domestic seminar on concerning fundamental and application of S phase was held in Kansai University on 24 September 1999. There were four lectures and 70 participants.

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  • 革新的低温表面熱処理技術とステンレス鋼の耐食・耐摩耗部材開発/低温浸炭窒化層(S相)の学術基盤の確立(財団法人関西情報・産業活性化センター)

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    Grant type:Competitive

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Social Activities

  • (一社)日本熱処理技術協会理事

    2019.6

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  • (一財)近畿高エネルギー加工技術研究所評議員

    2016.6

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  • (一社)日本技術者教育認定機構(JABEE)実地審査オブザーバー

    2015.11

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  • (一社)日本熱処理技術協会学術研究委員会委員

    2013.6

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  • (社)日本熱処理技術協会国際委員会委員

    2011.4 - 2013.3

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  • (社)日本金属学会関西支部評議員

    2011.4

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  • (社)日本熱処理技術協会西部支部常任幹事

    2008

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  • 関西大学 連続セミナー「ものづくり基盤技術」-ニーズに応える材料開発-(第3回)講師

    2007.2

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  • Councilor, Japan Society for Heat Treatment

    2007 - 2012

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  • クリエイション・コア東大阪 産学連携技術フォーラム第1回「表面処理技術」講師

    2005.9

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  • Steering Comittee Member, 17th IFHTSE Congress 2008

    2005 - 2009

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  • Secretary, Seibu Branch, Japan Society for Heat Treatment

    2004

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Devising educational methods

  • 「特別研究」(学部): 春と夏に合宿形式で集中学習および研究報告会を実施(2000~現在) 毎週1コマ、英語の雑誌の輪読会を実施(2000~現在) 1年に1度、科学技術に関する展覧会を見学(2000~現在) 卒業論文・修士論文の添削指導(2000~現在) 毎月、研究報告会を実施(2004~現在) 学科の行事として、中間発表会、最終発表会および口頭試問の実施(2000~現在) 「マテリアル科学実験1および2(先端マテリアル工学実験1および2)」(学部):半期に3度、報告書の添削指導(2002~現在) 「マテリアル工学実験1および2(先端マテリアル工学実験3および4)」(学部):半期に1度、実験の発表会の実施(2002~現在) オフィスアワーの実施 授業評価アンケートの内容から次年度の授業の改善 毎年1度、関西大学サイエンスセミナーにて近隣の小中高校生を相手に身近にある金属を使った実験の実施(2004~現在) 大阪中学生サマーセミナーにて大阪府の中学生を相手に身近にある金属を使った実験の実施(2011)

Teaching materials

  • 「先端マテリアル工学実験1および2」(学部):関西大学工学部先端マテリアル工学科編著『先端マテリアル工学実験1・2』(2006) 「先端マテリアル工学実験3および4」(学部):関西大学工学部先端マテリアル工学科編著『先端マテリアル工学実験3・4』(2006) 「マテリアル科学実験1および2」(学部):関西大学化学生命工学部化学・物質工学科マテリアル科学コース編著『マテリアル科学実験1・2』(2008) 「マテリアル工学実験1および2」(学部):関西大学化学生命工学部化学・物質工学科マテリアル科学コース編著『マテリアル工学実験1・2』(2009)

Teaching method presentations

  •  特になし

Special notes on other educational activities

  • 化学・物質工学科マテリアル科学コース(旧先端マテリアル工学科)の教育プログラムが日本技術者教育認定機構(JABEE)の認定を受けている(2002年認定、2007年継続認定、2012年継続審査予定)。