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2010 Fiscal Year Annual Research Report

新機能Co基合金―その相安定性と工業材料への展開―

Research Project

Project/Area Number 19106012
Research InstitutionTohoku University

Principal Investigator

石田 清仁  東北大学, 大学院・工学研究科, 教育研究支援者 (20151368)

Co-Investigator(Kenkyū-buntansha) 大沼 郁雄  東北大学, 大学院・工学研究科, 准教授 (20250714)
Keywords新機能材料 / 新機能材料 / 耐熱合金 / 磁気記録媒体 / 磁気記録媒体 / 生体材料
Research Abstract

本研究では、Co基合金の熱力学・状態図データベース構築とそれに基づく耐熱材料・磁性材料・生体材料の開発を目的として行うが、本年度の研究実績概要は次の通りである。
Co基合金状態図データベース構築の一環として、Co-Ta2元系の相平衡を実験的に決定した。またCo-Al-WNi-Cr系の各2元系と3元系について熱力学的解析と計算を行った。γ'相やμ相、他の金属間化合物相、固相線、液相線も含めた解析を行い、その結果、Co-Al-W-Ni-Cr系についてγ'相を含めたCo-rich側の相平衡をシミュレーション出来るようになった。これらのデータベースを利用して合金設計を行い鋳造材がFSW(摩擦攪拌接合)のツール材と極めて良い特性を示す事を見出した。また鍛造用合金も試作してクリープ特性を調査した結果、現用のNi基スーパーアロイであるWaspaloyよりクリープ強度に優れる事が分かった。Co基垂直磁化膜の磁気異方性に及ぼす結晶構造、格子ひずみ、積層欠陥の密度等の影響を調べるために、Co、Co-Pt、Co-Pd薄膜を作製し、磁化測定を行った。hcp-Co(0001)、Co-Pt(0001)、Co-Pd(0001)とfcc-Co-Pd(0001)は、MgO(111)基板にRu(0001)10nmを下地層として製膜し、Co(1010)は、MgO(110)基板にCr(211)10nmを下地層として製膜した。生体材料としてASTM規格のF90材についてポーラス化を試み、表面は凸凹状の形状になったが内部までのポーラス化は困難であることがわかった。

  • Research Products

    (22 results)

All 2011 2010

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (11 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Magnetic properties and phase stability of L2_1 phase in Co_2Mn(Ga_<1-x>Z_x) (Z=Si, Ge, and Sn) Heusler alloys2011

    • Author(s)
      A.Okubo, ら
    • Journal Title

      Applied Physics letters

      Volume: 96 Pages: 222507 1-3

    • Peer Reviewed
  • [Journal Article] Ni substitution effects in Co on the magnetic properties for Co_2MnAl Heusler alloys2011

    • Author(s)
      A.Okubo, ら
    • Journal Title

      Journal of Applied Physics

      Volume: 109 Pages: 07B114 1-3

    • Peer Reviewed
  • [Journal Article] Phase transformations in the B2 phase of Co-rich Co-Al binary alloys2011

    • Author(s)
      K.Niitsu, ら
    • Journal Title

      The Journal of Alloys and Compounds

      Volume: 509 Pages: 2697-2702

    • Peer Reviewed
  • [Journal Article] Large magnetic-field-induced strain in Co-Ni-Al single-variant ferromagnetic shape memory alloy2010

    • Author(s)
      H.Morito, ら
    • Journal Title

      Scripta Materialia

      Volume: 63 Pages: 379-382

    • Peer Reviewed
  • [Journal Article] Hyperfine coupling constant for 59Co estimated from a high-field susceptibility and high-field NMR shift in ferromagnetic Co2TiGa and Co2VGa2010

    • Author(s)
      H.Nishihara, ら
    • Journal Title

      Journal of Physics : Conference Series

      Volume: 200 Pages: 032052 1-4

    • Peer Reviewed
  • [Journal Article] Magnetization process near the Curie temperature of a ferromagnetic Heusler alloy Co2CrGa2010

    • Author(s)
      H.Nishihara, ら
    • Journal Title

      Journal of Physics : Conference Series

      Volume: 200 Pages: 032053 1-4

    • Peer Reviewed
  • [Journal Article] Magnetic properties and phase stability of Co_2(Ti_<1-x>Mn_x)Ga Heusler alloys2010

    • Author(s)
      A.Okubo, ら
    • Journal Title

      Journal of Physics : Conference Series

      Volume: 200 Pages: 062018 1-4

    • Peer Reviewed
  • [Journal Article] Electronic specific heat coefficient and magnetic properties of L2_1 phase in Co_2YGa (Y=Cr, Mn and Fe) Heusler alloys2010

    • Author(s)
      R.Y.Umetsu, ら
    • Journal Title

      Journal of Physics : Conference Series

      Volume: 200 Pages: 062036 1-4

    • Peer Reviewed
  • [Journal Article] Soft X-ray magnetic circular dichroism of L2_1-type Co_2FeGa Heusler alloy2010

    • Author(s)
      R.Y.Umetsu, ら
    • Journal Title

      Journal of Physics D : Applied Physics

      Volume: 43 Pages: 105001 1-5

    • Peer Reviewed
  • [Journal Article] Powder neutron diffraction studies for the L2_1 phase of Co_2YGa (Y=Ti, V, Cr, Mn and Fe) Heusler alloys2010

    • Author(s)
      R.Y.Umetsu, ら
    • Journal Title

      The Journal of Alloys and Compounds

      Volume: 499 Pages: 1-6

    • Peer Reviewed
  • [Presentation] Ni substitution effects in Co on the magnetic properties for Co_2MnAl alloys2011

    • Author(s)
      A.Okubo, ら
    • Organizer
      MMM 2010 55th Annual Conference on Magnetism and Magnetic Materials
    • Place of Presentation
      アトランタ(米国)
    • Year and Date
      2011-11-16
  • [Presentation] Phase Diagrams and Design of Some Advanced Materials2011

    • Author(s)
      K.Ishida
    • Organizer
      NCPDC
    • Place of Presentation
      瀋陽(中国)
    • Year and Date
      2011-10-14
  • [Presentation] DEVELOPMENT OF COBALT-BASED ALLOY FSW TOOL FOR HIGH-SOFTENING-TEMPERATURE MATERIALS2011

    • Author(s)
      Yutaka S.Sato, ら
    • Organizer
      2011 TMS Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials X
    • Place of Presentation
      サンディエゴ(米国)
    • Year and Date
      2011-03-01
  • [Presentation] 強磁性ホイスラー合金Co_2VGaのキュリー点近傍での磁化過程2010

    • Author(s)
      西原弘訓, ら
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪(日本)
    • Year and Date
      20100923-20100926
  • [Presentation] Co-Al,Co-W及びCo-Al-W系合金の相平衡の実験的決定と熱力学解析2010

    • Author(s)
      品川一矢, ら
    • Organizer
      日本金属学会第147回秋期講演大会
    • Place of Presentation
      札幌(日本)
    • Year and Date
      2010-09-26
  • [Presentation] Phase transformations in B2 phase of Co-rich Co-Al binary alloys2010

    • Author(s)
      K.Niitsu, ら
    • Organizer
      PRICM 7 The 7th Pacific Rim International Conference on Advanced Materials and Processing
    • Place of Presentation
      ケアンズ(オーストラリア)
    • Year and Date
      2010-08-05
  • [Presentation] Partition of Alloying Elements in Co-Al-W-Base Systems2010

    • Author(s)
      T.Omori, ら
    • Organizer
      PRICM 7 The 7th Pacific Rim International Conference on Advanced Materials and Processing
    • Place of Presentation
      ケアンズ(オーストラリア)
    • Year and Date
      2010-08-05
  • [Presentation] Phase Equilibira and Microstructure on γ' Phase in Co-Ni-Al-W-Cr System2010

    • Author(s)
      K.Shinagawa, ら
    • Organizer
      PRICM 7 The 7th Pacific Rim International Conference on Advanced Materials and Processing
    • Place of Presentation
      ケアンズ(オーストラリア)
    • Year and Date
      2010-08-05
  • [Presentation] The Curie temperatures and order-disorder transition temperatures of Co2(Til-xMnx)Z(Z=Al, Ga) Heusler alloys2010

    • Author(s)
      A.Okubo, ら
    • Organizer
      ISAMMA 2010 The 2nd International Symposium on Advanced Magnetic Materials and Applications
    • Place of Presentation
      仙台(日本)
    • Year and Date
      2010-07-14
  • [Presentation] Phase transformations in the B2 phase and microstructural control of Co-rich Co-Al binary alloys2010

    • Author(s)
      K.Niitsu, ら
    • Organizer
      KAIST Korea Advanced Institute of Science and Technology
    • Place of Presentation
      テジョン(韓国)
    • Year and Date
      2010-06-27
  • [Presentation] Effect of Alloying Elements on Phase Equilibria in New Co-based Superalloy2010

    • Author(s)
      T.Omori, ら
    • Organizer
      CIMTEC 2010 Internationals Conferences On Modern Materials & Technologies
    • Place of Presentation
      モンテカニーニ(イタリア)
    • Year and Date
      2010-06-14
  • [Patent(Industrial Property Rights)] CO基合金2010

    • Inventor(s)
      大崎元嗣, ら
    • Industrial Property Rights Holder
      大同特殊鋼(株), ら
    • Industrial Property Number
      特願2010-186562
    • Filing Date
      2010-08-23

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Published: 2013-06-26  

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