Rugosite atomique et adsorption chimique aux interfaces solide-liquide des systemes metalliques binaires

A model is presented based on a treatment of the solid-liquid interface as a single layer and on the use of Bragg-Williams statistics. It enables calculations of atomic roughness, chemical adsorption and interfacial energy of binary metallic systems. The model assumes a knowledge of the phase diagram, thermodynamic heats of solution and the interfacial energy of the pure metals. It is shown that, in a given system, the variation in atomic roughness and interfacial energy with solute concentration depends critically on the tendency of the solute toward preferential adsorption at the interface. The validity of the model is tested for different systems by comparing the calculated values of interfacial energy with experimental values. © 1978.