A Quasi-Chemical Equilibrium Calculation of the Ge-Si-Sn and Ge-Si-Pb Ternary Phase Diagrams

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Abstract
The ternary phase diagrams Ge‐Si‐Sn and Ge‐Si‐Pb have been calculated based on the quasi‐chemical equilibrium treatment of the lattice model for both the liquid and solid solutions. The calculation, using temperature independent interaction parameters obtained by fitting the calculated binary liquidus curves to experimental data, agrees to within experimental error with liquidus and tie line data obtained from the steady‐state epitaxial growth of Si‐Ge alloys from Sn and Pb solutions.