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Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations      
Yazarlar
Rabia Benhafid
Aisa Belgacem Bouzida
Yassine Djaballah
Doç. Dr. Abdullah CANDAN Doç. Dr. Abdullah CANDAN
Kırşehir Ahi Evran Üniversitesi, Türkiye
Doç. Dr. Ahmet İYİGÖR Doç. Dr. Ahmet İYİGÖR
Kırşehir Ahi Evran Üniversitesi, Türkiye
Gökay Uğur
Gazi Üniversitesi, Türkiye
Özet
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, -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.
Anahtar Kelimeler
Al-Ba alloys | Ba-Ge alloys | CALPHAD | first-principles calculation | phase diagram | thermodynamics
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
Dergi ISSN 1547-7037
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q3
Makale Dili İngilizce
Basım Tarihi 04-2019
Cilt No 40
Sayı 2
Sayfalar 195 / 205
Doi Numarası 10.1007/s11669-019-00714-2
Makale Linki http://link.springer.com/10.1007/s11669-019-00714-2