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Study on Phase Stability of GCP Intermetallic Compound Co_3X

Research Project

Project/Area Number 19860013
Research Category

Grant-in-Aid for Young Scientists (Start-up)

Allocation TypeSingle-year Grants
Research Field Physical properties of metals
Research InstitutionTohoku University

Principal Investigator

OMORI Toshihiro  Tohoku University, 大学院・工学研究科, 助教 (60451530)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,115,000 (Direct Cost: ¥2,710,000、Indirect Cost: ¥405,000)
Fiscal Year 2008: ¥1,755,000 (Direct Cost: ¥1,350,000、Indirect Cost: ¥405,000)
Fiscal Year 2007: ¥1,360,000 (Direct Cost: ¥1,360,000)
Keywords相安定性 / 金属間化合物 / コバルト合金 / 状態図 / 最密充填構造 / Co合金 / GCP相
Research Abstract

本研究では、Co-W-Ga、Co-W-Ta、Co-Mo-Ta、Co-Al-Ta系に特に着目し、Co_3X型最密充填構造の相安定性を調査した。これらの合金において800℃または900℃でL1_2構造のγ'相が観察された。調査温度においてはいずれも準安定であった。また、Co-W-Ga、Co-W-Ta、Co-Mo-Ta各3元系状態図を決定した。Co-W-Ta、Co-Mo-Ta合金で室温においてそれぞれ584Hv、589Hvの高い硬さが得られた。

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (10 results)

All 2009 2008 2007

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (8 results)

  • [Journal Article] Phase Stability of the L1_2 Compound and Microstructural Changes in Co-(W or Mo)-Ta Ternary Alloys2009

    • Author(s)
      H.Chinen, T.Omori, K.Oikawa, I.Ohnuma, R.Kainuma and K.Ishida
    • Journal Title

      Proceedings of 2008 MRS Fall Meeting 1128(印刷中)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Phase Stability of the L1_2 Compound and Microstructural Changes in Co-(W or Mo)-Ta Ternary Alloys2009

    • Author(s)
      H. Chinen, T. Omori, K. Oikawa, I. Ohnuma, R. Kainuma and K. Ishida
    • Journal Title

      Proceedings of 2008 MRS Fall Meeting 1128(印刷中)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] Phase stability of L1_2 compound and microstructural change in Co-(W or Mo)-Ta ternary alloys2008

    • Author(s)
      H.Chinen, T.Omori, K.Oikawa, I.Ohnuma, R.Kainuma and K.Ishida
    • Organizer
      2009 Fall Meeting of Materials Research Society
    • Place of Presentation
      Boston, USA
    • Year and Date
      2008-12-03
    • Related Report
      2008 Final Research Report
  • [Presentation] Phase stability of L1_2 compound and microstructural change in Co-(W or Mo)-Ta ternary alloys2008

    • Author(s)
      H. Chinen, T. Omori, K. Oikawa, I. Ohnuma, R. Kainuma and K. Ishida
    • Organizer
      Materials Research Society
    • Place of Presentation
      ボストン、米国
    • Year and Date
      2008-12-03
    • Related Report
      2008 Annual Research Report
  • [Presentation] Co-W-Ga3元系のL1_2化合物の相安定性とCo側における相平衡2008

    • Author(s)
      知念響、大森俊洋、及川勝成、大沼郁雄、貝沼亮介、石田清仁
    • Organizer
      第143回日本金属学会
    • Place of Presentation
      熊本市
    • Year and Date
      2008-09-24
    • Related Report
      2008 Annual Research Report 2008 Final Research Report
  • [Presentation] Co-Al-Ta合金における相平衡ならびにL1_2化合物相の相安定性2008

    • Author(s)
      柴入紘介、知念響、大森俊洋、及川勝成、大沼郁雄、貝沼亮介、石田清仁
    • Organizer
      第143回日本金属学会
    • Place of Presentation
      熊本市
    • Year and Date
      2008-09-24
    • Related Report
      2008 Annual Research Report 2008 Final Research Report
  • [Presentation] Co-W-Ga合金におけるL1_2化合物相の析出2008

    • Author(s)
      知念響、大森俊洋、及川勝成、大沼郁雄、貝沼亮介、石田清仁
    • Organizer
      第142回日本金属学会
    • Place of Presentation
      東京
    • Year and Date
      2008-03-28
    • Related Report
      2008 Final Research Report
  • [Presentation] Co-W-Ga 合金における L12 化合物相の析出2008

    • Author(s)
      知念響、大森俊洋、及川勝成、大沼郁雄、貝沼亮介、石田清仁
    • Organizer
      日本金属学会
    • Place of Presentation
      (東京)武蔵工業大学
    • Year and Date
      2008-03-28
    • Related Report
      2007 Annual Research Report
  • [Presentation] Co-W-Ta合金における相平衡とL1_2化合物の相安定性2007

    • Author(s)
      知念響、佐藤順、大森俊洋、及川勝成、大沼郁雄、貝沼亮介、石田清仁
    • Organizer
      日本金属学会
    • Place of Presentation
      岐阜市
    • Year and Date
      2007-09-19
    • Related Report
      2008 Final Research Report
  • [Presentation] Co-W-Ta 合金における相平衡と L12化合物の相安定性2007

    • Author(s)
      知念響、佐藤順、大森俊洋、及川勝成、大沼郁雄、貝沼亮介、石田清仁
    • Organizer
      日本金属学会
    • Place of Presentation
      岐阜大学
    • Year and Date
      2007-09-19
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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