Temperature–Concentration Dependence of Thermodynamic Functions of Mixing for Liquid Alloys of Copper with Rare-Earth Metals

Abstract

The composition and temperature dependences of thermodynamic functions of mixing in liquid alloys of copper with rare-earth metals and their variation in the series were considered. It was shown for majority of systems in the series, the most intensive interaction of components is observed in composition range enriched with copper. The negative deviations of thermodynamic properties of mixing increase with decreasing of temperature. The main features of the temperature-composition depend-ence were explained in the framework of assumption of formation in the Cu-REM liquid alloys of chemical short-range order like to chemical compound. Temperature-composition dependence of thermodynamic functions of mixing was described in the frameworks of ideal associated solution model.