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Diffusion Mechanism of Atoms in Ordered Alloys at Low Temperature

Research Project

Project/Area Number 02805081
Research Category

Grant-in-Aid for General Scientific Research (C)

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

Principal Investigator

HASAKA Masayuki  Nagasaki University, Faculty of Engineering, Prof., 工学部, 教授 (30039698)

Co-Investigator(Kenkyū-buntansha) UCHIYAMA Yasuo  Nagasaki University, Faculty of Engineering, Associate Prof., 工学部, 助教授 (50039690)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1991: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1990: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsFe-Al alloy / Cu-Au Alloy / Boron / Vanadium / Titanium / Nickel / Diffusion Coefficient / Isotope effect / アイソト-プ効果 / イオンマイクロアナライザ-
Research Abstract

The knowledge of diffusion phenomena of atoms is essential to develop new materials for modern technologies and then to use safely mechanical and electrical equipments made from those highly designed materials. The sufficient resolution of secondary iron mass spectroscopy has proved to be available for determining the small diffusion coefficients and the isotope effects of many atoms down to relatively ll"ow temperature. Our research clarified the small diffusivities and the isotope effects and the diffusion mechanisms of several solute atoms in the ordered alloys of B2, DO_3 and L1_0 types at low temperatures, by using the profit of secondary ion mass spectroscopy. The main results obtained are as follows. The temperature dependences-of diffusivities of nickel, vanadium, titanium and boron in theFe-Al alloy were not explained by a simple Arrhenius relation. The diffusivities of vanadium, titanium and boron were controlled by the change of B2 order, while the diffusivity of nickel was determined by the changes of DO_3 order as well as B2 order. The isotope effect of boron was about 0.2 in the disordered state and the ordered states of B2 and DO_3 types in the Fe-Al alloy. The diffusion of boron proceeded through highly correlated mechanism in the Fe-Al alloy. The diffusivity of boron in the ordered state of the CuAu alloy was not smaller than that extrapolated from the disordered state. The isotope effect of boron in the CuAu alloy was 0.1 in the disordered state and 0.8 in the ordered state of L1_0 type. Correlation for the diffusion of boron was stronger in the disordered state than in the ordered state.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 森村 隆夫: "Fe_3Al規則合金中の不純物原子の拡散" 日本金属学会・日本鉄鋼協会九州支部学術講演会. 73 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 森村 隆夫: "Fe_3Al規則合金中の不純物拡散における同位体効果" 日本金属学会秋期大会講演概要. 653 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 森村 隆夫: "規則格子中の不純物拡散における同位体効果" 日本金属学会春期大会講演概要. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 羽坂 雅之: "低温における規則合金中の原子の拡散過程" 一般研究(C)成果報告書. 1-156 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Morimura, Takao: "Diffusion of impurity atoms in the ordered Fe_3Al alloy" Proc. of meeting, The Japan Inst. of Metals, Kyushu. 73 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Morimura, Takao: "Isttope effect of impurity diffusion in the ordered Fe_3Al alloy" Proc. of fall meeting, The Japan Inst. of Metals. 653 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Morimura, Takao: "Isotope effect of impurity diffusion in superlattices" Proc. of spring meeting, The Japan Inst. of Metals. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hasaka, Masayuki: "Diffusion mechanism of atoms in ordered alloys at low temperature" Reports of researches pursued under the Grant-in Aid for Scientific Research (C). Science and Culture, Japan. 1-156 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 森村 隆夫,羽坂 雅之,内山 休男,近藤 慎一郎,中島 弘道: "Fe_3Al規則合金中の不純物原子の拡散" 日本金属学会・日本鉄鋼協会九州支部学術講演会. 73 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 森村 隆夫,羽坂 雅之,中島 弘道,近藤 慎一郎: "Fe_3Al規則合金中の不純物拡散における同位体効果" 日本金属学会秋期大会講演概要. 653 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 森村 隆夫,羽坂 雅之,中島 弘道,近藤 慎一郎: "規則格子中の不純物拡散における同位体効果" 日本金属学会春期大会講演概要. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 羽坂 雅之: "低温における規則合金中の原子の拡散過程" 一般研究(C)成果報告書. 1-156 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 羽坂 雅之: "Fe_3Al中の原子の拡散" 日本金属学会秋期大会概要. 470 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 森村 隆夫: "Fe_3Al規則合金中の不純物拡散" 日本金属学会春期大会. (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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