The enhancement of solute diffusion by solute additions was considered. Attention was focused on the kinetic effect leading to solute enhancement arising from the kinetics of the encounter of a solute atom with a vacancy in the presence of other solute atoms. The study complements an earlier study of the enhancement of the solvent diffusivity. The fcc random alloy model was here used in the dilute limit. Monte Carlo techniques were used to calculate the solute diffusion enhancement factors, B1 and B2. Solute correlation factors, upon which the enhancement factors relied in this model, were calculated to a very high precision using long runs and by averaging over a very large number of atoms. There was found to be fair agreement with the kinetic treatments of Manning and of Holdsworth and Elliott, and excellent agreement with the self-consistent theory of Moleko et al.

Calculation of Enhancement Factors for Solute Diffusion in the FCC Dilute Random Alloy. M.J.Brown, I.V.Belova, G.E.Murch: Philosophical Magazine, 2004, 84[11], 1105-12