Tracer correlation factors were calculated by simulating the diffusion of atoms and defects on a computer using a Monte Carlo technique. The correlated motion of the atomic species by a vacancy mechanism were investigated for a binary random alloy with fcc structure. The tracer correlation factors for the atoms, fA and fB, and for the vacancies, fV, were calculated as functions of the jump frequencies, and the mixing ratio of A and B atoms for vacancy concentrations of 0.001 and 0.1. The results were compared with theories and Monte Carlo simulations from the literature. Substantial discrepancies with previous Monte Carlo studies were observed. It was concluded that the correlation factors given in the literature were systematically too high because the jump sequences in those calculations were too short.

Correlation Factors for Diffusion in Binary Random Alloys with FCC Structure. P.Franke, R.Dieckmann: Journal of Applied Physics, 1991, 70[2], 787-92