A liquid state least-squares procedure for obtaining solid state multicomponent diffusion coefficients from diffusion couples

被引：3
作者：
Miller, DG [1 ]
机构：
[1] Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94551 USA
来源：
ACTA MATERIALIA | 1998年 / 46卷 / 17期
关键词：
D O I：
10.1016/S1359-6454(98)00284-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A procedure is developed for analyzing combined concentration profiles from multicomponent solid-state diffusion data obtained with free-diffusion boundary conditions. This procedure is exactly analogous to the analysis of liquid-state diffusion data obtained from free-diffusion refractive-index profiles (e.g. from Rayleigh interferometry). All data from all couples are least-squared together to characterize the diffusion coefficient matrix. Different profile weightings provide interesting alternatives, as well as diagnostics. Symmetric averagings are shown to eliminate or reduce effects of concentration dependence. (C) 1998 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.
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页码：5993 / 5999
页数：7
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