Thermodynamics analysis of the rare earth metals and their alloys with indium in solid state

Abstract

Nonlinear correlative analyses between thermodynamic and some physico-chemical properties of rare-earth metals (RE) and their alloys with indium are performed for the isostructural phases RE and REIn3. The thermodynamics values (Gibbs energies of formation, enthalpies of formation, and entropies of formation at 298K and 775K and standard entropies) of LnIn3 phases are calculated on the basis of calorimetry and potentiometry results. The proposed correlation between physico-chemical and thermodynamic properties agrees for all the isostructural phases REX (X are others elements of the periodic table). The resulting thermodynamic data are recommended for metallurgical handbook.