Extensive Monte Carlo simulation results were reported on the collective correlation factors (the correlated parts of the phenomenological coefficients) in a random binary alloy with the monovacancy mechanism operating at a very small vacancy concentration. It was found that results from the analytical formalism of Manning were in excellent agreement with the Monte Carlo results over a very wide range of the ratio of the atom-vacancy exchange frequencies. Surprisingly, it turned out that the expressions for the collective correlation factors derived in the self-consistent theory of Moleko et al. actually simplified to exactly the same expressions as those of Manning for the binary alloy (although in the case of ternary and higher multi-component random alloys the Moleko et al. formalism provided a different solution to the collective correlation problem).

Collective Diffusion in the Binary Random Alloy. I.V.Belova, G.E.Murch: Philosophical Magazine A, 2000, 80[3], 599-607