Abstract
Approximate expressions are derived for the phenomenological coefficients for vacancy-mechanism matter transport in a nearest-neighbour interaction lattice gas model of a concentrated binary alloy using the Kikuchi-Sato jump frequency model. These expressions are constructed from the leading coefficients (moments) in the Taylor series expansions in powers of time of the time correlation functions working within the Mori continued fraction representation. Numerical results are compared with earlier Monte Carlo simulations and with the predictions of the path probability method. Comparison with new Monte Carlo results shows that the approximate time correlation functions are good at short times but are too small at relatively long times.
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