Relations between atomic transport coefficients in a binary system

Abstract

Abstract A number of relations formally linking the phenomenological coefficients and other atomic transport coefficients such as the tracer diffusion coefficients, intrinsic diffusion coefficients and ionic conductivities are developed in the context of the Onsager linear formalism of non-equilibrium thermodynamics and two new compound relations recently derived by Lidiard et al. The relations are then tested by Monte Carlo computer simulation of the asymmetric form of the order-disorder model of a binary alloy. It is found that these relations perform considerably more accurately than the Manning relations over the entire region of compositions and at temperatures above and below the critical temperature. The relations would appear to be useful for accurately determining the phenomenological coefficients through a knowledge of measurable quantities.