Theory of diffusion kinetics in the bcc random alloy

Abstract

In this paper, Manning's diffusion kinetics formalism for the binary random alloy is combined with Howard's general correlation factor formalism to give a diffusion kinetics theory for the bcc random alloy with nearest- and next-nearest-neighbour jumps. The derived equations for the atomic component correlation factors reduce to those of Manning when next-nearest-neighbour jumps are omitted. The percolation implications of the derived equations are discussed in detail. Computer simulation is used to test the validity of the theory. Good agreement is found.