Interdiffusion in β phase Cu–Al alloys

The diffusion behavior of β phase Cu–Al has been studied at 800, 850, and 950 °C using the experimental approach and analysis scheme of Kirkendall and Darken. Diffusion couples were made using the window frame technique and concentration profiles were determined by electron probe microanalysis. The...

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Bibliographic Details
Published in:Journal of applied physics 1983-06, Vol.54 (6), p.3172-3175
Main Author: Romig, A. D.
Format: Article
Language:English
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Summary:The diffusion behavior of β phase Cu–Al has been studied at 800, 850, and 950 °C using the experimental approach and analysis scheme of Kirkendall and Darken. Diffusion couples were made using the window frame technique and concentration profiles were determined by electron probe microanalysis. The chemical diffusion coefficient, D̃ was found to be D̃=0.65 exp(−42200/RT) cm2/s. The diffusivity was observed to be independent of composition over the range 11–13 wt. % Al. The self-diffusion coefficients DCu and DAl were determined to be DAl =0.13 exp(−38900/RT) cm2/s and DCu =2.2 exp(−43400/RT) cm2/s. All activation energies are in calories/mole.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.332475