Fe-Cr合金中の拡散

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書誌事項

タイトル別名
  • The Diffusion in the Iron-Chromium Alloy
  • Fe-Cr ゴウキン チュウ ノ カクサン

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抄録

The self-diffusion data in the b.c.c. phase of Fe-Cr alloys—the author’s data and others in the literatures—have been summarized. (1) The self-diffusion coefficients of chromium and iron, (2) the chemical diffusion coefficients, are shown as a function of composition in the temperature range from 950° to 1275°C. (3) D0 for self-diffusion of chromium has the order of 10−4 cm2/sec in pure chromium. D0 for chromium shows large variation with composition, with a maximum of 10+1 cm2/sec at about 70 at%Cr and a minimum of 10−1 cm2/sec in 30 to 40 at%Cr. The concentration dependence of D0 of the self diffusion for the iron has the same trend as for chromium, although the self-diffusion for iron has a maximum of 10+4 cm2/sec and a minimum of 10−1 cm2/sec. (4) The concentration dependence of the activation energy of the self diffusion for chromium and iron is qualitatively similar to that of D0. For chromium self-diffusion, it varies in the range from 48 kcal/g-atom (30 to 40 at%Cr) to 72 kcal/g-atom(about 70 at%Cr). For iron self-diffusion, it varies in the range from 50 kcal/g-atom to 90 kcal/g-atom. The mechanism of the diffusion in this system is discussed.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 25 (11), 698-702, 1961

    公益社団法人 日本金属学会

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