Abstract
A thermodynamic description of the Al-Cu-Zn system is obtained by thermodynamic modeling of the Gibbs energies of all the phases in the system. The model parameters are optimized based on the established descriptions of the constituent binaries and ternary experimental phase equilibrium and thermodynamic data available in the literature. The agreement obtained between calculated phase equilibria and thermodynamic properties and experimental data suggest that the current description of this system is reasonable. The calculated phase equilibria close to the Al-Zn side are believed to be reliable for research in related fields such as solidification and phase transformation and for practical applications, while those near the Cu-rich region are topologically correct but need to be confirmed by future experimental investigations.
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