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On Concentration-Dependent Solid State Diffusion

Published online by Cambridge University Press:  26 July 2012

Yang-Tse Cheng
Yang-Tse Cheng*
Affiliation:
General Motors Research Laboratories, Warren, Michigan 48090–9055
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Abstract

Using a master equation approach, we derive a general expression for the diffusion coefficient as a function of concentration-dependent jump rates. When this approach is applied to diffusion in a binary solid, Darken's equation for intrinsic diffusion coefficients is derived together with an expression for self diffusion coefficients which satisfies the semi-empirical Ugaste relationship. This analysis suggests that the Darken term and the self diffusion coefficients are in general related.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 230: Symposium R – Phase Transformation Kinetics in Thin Films , 1991 , 115
Copyright
Copyright © Materials Research Society 1992

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