Abstract
The results of studies to obtain thermodynamic constants of condensed and vapor phases of binary systems of magnesium with beryllium are presented in this paper, and liquid-vapor phase transitions at atmospheric pressure and in vacuum are also constructed. Mg - Be alloys of a given composition were prepared as a result of this work. The partial pressures of magnesium over binary alloys with beryllium were determined with the use of the boiling point method (isothermal variant). The partial vapor pressure of beryllium was found by numerical integration of the Gibbs-Duhem equation. The partial pressures of magnesium and beryllium are represented by temperature-concentration dependences. The boundaries of melt and vapor coexistence fields of magnesium-beryllium system at atmospheric pressure and in vacuum of 1.33 kPa are calculated and plotted on the state diagram. It is established that the separation of magnesium-beryllium system alloys does not involve technological difficulties.