Computer simulation of the vacancy-wind effect in a concentrated alloy with long-and short-range order

Abstract

Diffusion via the agency of vacancies in an s.c. binary alloy with long-and short-range order has been simulated using a Monte Carlo method. Results for the vacancy-wind factor occurring in the Darken relation connecting the intrinsic diffusivity, the tracer diffusivity and the thermodynamic factor were collected over the entire composition range at six temperatures. The results obtained are in excellent agreement with Manning's expression, which is exact for the random alloy, substituted with previously obtained computer-simulated values of the tracer diffusivities.