Experimental investigation and thermodynamic calculation of phase equilibria in the Mg Pb Zn ternary system
Abstract The phase equilibria of the Mg Pb Zn ternary system were investigated using electron probe microanalysis (EPMA) back scattered electron (BSE) imaging and X ray diffraction (XRD) methods. Three isothermal sections of the Mg Pb Zn ternary system at 200 degC, 300 degC and 400 degC were experimentally established. The phase equilibria of Mg Pb binary and Mg Pb Zn ternary system were thermodynamically assessed by using CALPHAD (Calculation of Phase Diagrams) method on the basis of the presently determined experimental data. A consistent set of thermodynamic parameters has been derived for describing the Gibbs free energies of each solution phase and intermetallic compound in the Mg Pb and Mg Pb Zn systems. The calculated phase diagrams and thermodynamic properties in the Mg Pb and Mg Pb Zn systems are in good agreement with experimental data.