Cu-Fe系反応拡散における相互拡散係数と界面移動速度

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タイトル別名
  • Interdiffusion Coefficients and Moving Rates of Phase Interfaces for Reaction-Diffusion in the Cu-Fe System
  • Cu-Feケイ ハンノウ カクサン ニ オケル ソウゴ カクサン ケイスウ ト カイメン イドウ ソクド

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説明

Interdiffusion in the Cu-Fe system was studied in the temperature range between 860∼1010°C, using diffusion couples of pure metals.<BR>The interdiffusion coefficients \ ildeD in the Cu, γ-Fe and α-Fe phases of the Cu-Fe system were determined by the Matano method and also by a method which was based on a graphical evaluation of the relative amounts of transfer of both component atoms through a phase interface.<BR>The results obtained by these two methods are in good agreement for the γFe and αFe phases. However, the activation energy \ ildeQ and the frequency factor \ ildeD0 for interdiffusion in the Cu phase obtained by the present method differed clearly from those obtained by the Matano method. The difference was due to the concentration dependence of \ ildeD and to the temperature dependence of the solubility limit of Fe in the Cu phase. An exact consistency was seen between the moving rate constants of phase interfaces determined from concentration-distance curves and the ones calculated by an iterative approximation from the characteristic values of the system.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 38 (5), 415-421, 1974

    公益社団法人 日本金属学会

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