Assessment of the mg-bi system

Abstract

The thermodynamic data for the Mg-Bi system have been optimized from measured thermodynamic data. A two-sublattice model for ionic melt was used to express the Gibbs free energy of the liquid phase. The high and low temperature non-stoichiometric Mg3Bi2 compounds were described by a two-sublattice model, Mg3(Va, Bi)2. The experimental thermodynamic and phase diagram data were well reproduced by the optimized thermodynamic data. Parameters describing the Gibbs free energies of the all phases and the calculated phase diagram and thermodynamic functions are presented.