Grain boundary diffusion was here treated as a correlated walk in a periodic system with multiple jump frequencies. The partial correlation factors which were associated with various jumps were calculated by using a matrix method in which the matrix elements (next-jump probabilities) were deduced from Monte Carlo simulations of individual point defect-tracer encounters. This method was used to study tracer self-diffusion, via the vacancy mechanism, in directions which were parallel or perpendicular to the [00l] tilt axis of a  = 5 (310) grain boundary in Ag, over a wide temperature range.

Y.Mishin: Materials Science Forum, 1996, 207-209, 533-6