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Ni/NiAl拡散対を利用したNi_3Al単結晶の創製

Research Project

Project/Area Number 11123229
Research Category

Grant-in-Aid for Scientific Research on Priority Areas (A)

Allocation TypeSingle-year Grants
Research InstitutionKyushu University

Principal Investigator

堀田 善治  九州大学, 工学研究科, 助教授 (20173643)

Project Period (FY) 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1999: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsNi / Ni_3Al / NiAl / 反応拡散 / 単結晶 / 固有拡散係数 / 相互拡散係数 / 金属間化合物
Research Abstract

Ni/NiAlの拡散熱処理条件を詳細に制御してNi_3Al単結晶の最適な作製条件を確立するとともに、Ni_3Al中での相互拡散係数や固有拡散係数を決定した。得られた結果を以下に要約する。
1.透過電子顕微鏡や方位像顕微鏡によりNi_3Al単結晶の生成が1373K以上の温度で明瞭に確認された。
2.このNi_3Al相の成長速度はNi/Ni-38mol%Alの方がNi/Ni-45mol%Alより速くなり、Niに富んだNiAl相を用いる方が単結晶作製に有利であることが示された。
3.濃度勾配より求めたNi_3Alの相互拡散係数はこれまでの報告値とよく一致した。
4.Ni_3Al中のNiとAlの固有拡散係数は同程度であり、Alが拡散しにくいとする従来の考えとは異なり、α副格子空孔モデルやAnti-Structure Bridgeモデルを支持する結果となった。

Report

(1 results)
  • 1999 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Z. Horita: "Overview-Quantitactive X-ray microanalysis in Aualytical electron microscop*y"Mater. Trans. JIM. 39. 947-958 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] N. Komai: "Study of Ni/Ni-8mol%Ti Diffusion-couple"Acta Mater. 46. 4443-4451 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] K. Fujiwara: "Growth of Ni_3Al in Ni/NiAl Diffusion Couples"Proc. 3rd Pacific Rim Inf. Conf.. 1251-1256 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] S. Tanaka: "Application of S・factor method to Ti-Al-Cr System in Analytical Electron Microscopy"J. Electron Microscopy. 47. 9-15 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] 堀田善治: "分析電子顕微鏡(AEM-EDS,EELS)"ふぇらむ. 4. 132-139 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 堀田善治: "分析電子顕微鏡の拡散対研究への応用"電子顕微鏡. 34. 7-12 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Z. Horita: "Chemical composition analysis for interfaces by analytical electron microscopy"Proc. 9th Cimtec-World Forum. 71-82 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] T. Fujita: "Advanced form of 5-6actor method in analyticalelectron microscopy"J. Electron Microscopy. 48. 561-568 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K. Fujiwara: "Measurments of Intrinsic Diffusion Coefficients in Ni_3Al"Proc. Int. Conf. on Solid-Solid phase Transformation. 481-484 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K. Oh-ishi: "Fabrircation and Thermal Stability of Nanocrystalline Ni-Al-Cr Alloy : Comparison with pure Cu and Ni"J. Mater. Res.. 14. 4200-4207 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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