Cu-Sn 2元系合金のβおよびγ相における相互拡散

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  • Interdiffusion in β and γ Phases of the Cu-Sn Binary Alloy System
  • Cu Sn 2ゲンケイ ゴウキン ノ ベータ オヨビ ガンマソウ ニ オケル
  • Interdiffusion in β and γ Phases of the Cu-Sn Binary Alloy System

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The interdiffus on coefficients (\ ildeD) in the β and γ phases of the Cu-Sn binary alloy system were determined by the Boltzmann-Matano method in the temperature range between 874 and 993 K using the diffusion couples consisting of pure copper and γ (Cu-16.9∼17.9 at%Sn) alloys. \ ildeD increased with tin content in the β phase, while it decreased remarkably with tin content in the γ phase except for the temperature at 874 K; \ ildeD at this temperature only did not have concentration dependence. On the other hand, the intrinsic diffusion coefficients (DCu and DSn) were calculated by using Darken’s method, where the Kirkendall markers were observed to move toward the copper-rich side, and the chemical composition at the Kirkendall marker was Cu-14.5 at%Sn.<BR>The temperature dependences of \ ildeD, DCu and DSn at the above chemical composition were given by<BR>(This article is not displayable. Please see full text pdf.) <BR>\oindentso that it was considered that the copper atom diffused faster than the tin atom at the Kirkendall marker position.<BR>The expansion of diffusion couples after diffusion annealing has been concluded to originate mainly from the Kirkendall effect, although the change of molar volume cannot be neglected.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 44 (9), 1007-1012, 1980

    公益社団法人 日本金属学会

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