The diffusion of interstitial solute atoms, which were subject to nearest-neighbor solute-solute interactions, was simulated by means of a modified Monte Carlo method. Solute correlation factors, nearest neighbor vacancy availability factors and effective jump frequency factors were calculated as functions of composition and temperature. Compared with non-interacting atoms attraction between solute atoms always retarded diffusion whereas repulsion always enhanced diffusion except within the ordered region.

Interstitial Solute Diffusion in Metals. G.E.Murch, R.J.Thorn: Journal of Physics and Chemistry of Solids, 1977, 38[7], 789-93