Application of the Ideal Associated Solution Model on Description of Thermodynamic Properties of Several Binary Liquid Alloys

Abstract

Activities, enthalpies of mixing and the other thermodynamic properties for different binary liquid alloys were calculated from the ideal associated solution model, assuming the formation of several species of associated compounds whose stoichiometric compositions correspond for the most part to those of the intermetallic compounds or intermediate phases in the solid state. The calculated results were in good agreement with the values of Hultgren et al. for the following typical A-B binary systems; (1) three systems (Sb-Sn, Mg-Pb, Bi-Mg) with only one compound in the solid state (AB, A₂B, A₂B₃ respectively), (2) the Ag-In system in which the activity curve of In shows the change of deviation from negative to positive from Raoult’s law, (3) the Au-Cu, Cd-Hg, and Al-Au systems with several species of compounds in the solid state.