Abstract
Diffusion in a regular solid solution was investigated. A thin plate of isotropic solid of constant surface molal fraction was considered. The regular solution is described by the parameter a. When a is positive, the attraction between unlike atoms is greater than the attraction between like atoms, and conversely. The depths of penetration and average molal fraction for a given period increase with increasing a. The separation of two curves for given a increase with increasing surface molal fraction. The diffusion coefficient is positive only if a is greater than —1/X(1 — X). © 1995, Materials Research Society. All rights reserved.