Abstract
The phase diagrams of Al-Ba and Ba-Ge systems are optimized by coupling the CALPHAD approach and first-principles calculations. The binary intermetallic compounds were treated as stoichiometric phases. The total energies of nine intermetallic compounds: Al4Ba, Al13Ba7, Al5Ba3, Al5Ba4, Ba2Ge, Ba5Ge3, BaGe, β-Ba3Ge4 and BaGe2 were calculated by first-principles calculation using density functional theory approximation as implemented in the VASP (Vienna Ab-initio Simulation Package) code and used in the CALPHAD approach to assess the two systems. The liquid solutions are described by the Redlich–Kister polynomial model. A set of thermodynamic parameters were obtained for the Al-Ba and Ba-Ge systems. The calculated phase diagrams and thermodynamic properties are in good agreement with most of the accuracy available data.
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Benhafid, R., Belgacem Bouzida, A., Djaballah, Y. et al. Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations. J. Phase Equilib. Diffus. 40, 195–205 (2019). https://doi.org/10.1007/s11669-019-00714-2
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DOI: https://doi.org/10.1007/s11669-019-00714-2