Thermodynamic modeling of the La-Te system aided by first-principles calculations

Yong Jie Hu, Jorge Paz Soldan Palma, Yi Wang, Samad A. Firdosy, Kurt E. Star, Jean Pierre Fleurial, Vilupanur A. Ravi, Zi-kui Liu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A complete thermodynamic description of the La-Te binary system is developed by means of CALculation of PHAse Diagram (CALPHAD) method in combination with available experimental data in the literature and the present first-principles calculations based on density functional theory. The intermetallic phases with homogeneity ranges, La3-xTe4 and LaTe2-x, are modeled using a two-sublattice (La,Va)3(Te)4 model and a three-sublattice (La)1(Te)1(Te,Va)1 model based on their structure features, respectively. The intermetallic phases, LaTe and LaTe3, are treated as stoichiometric compounds. The thermodynamic properties of the intermetallic compounds and their corresponding end members at finite temperatures are predicted using first-principles quasi-harmonic approach. The associate solution model is used to describe the short-range ordering behavior of the liquid phase. The calculated phase diagram agrees well with the available phase equilibrium data in the literature.

Original languageEnglish (US)
Pages (from-to)227-236
Number of pages10
JournalCalphad: Computer Coupling of Phase Diagrams and Thermochemistry
Volume61
DOIs
StatePublished - Jun 1 2018

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Intermetallics
Thermodynamics
Phase equilibria
Phase diagrams
Density functional theory
Thermodynamic properties
Liquids
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Computer Science Applications

Cite this

Hu, Yong Jie ; Paz Soldan Palma, Jorge ; Wang, Yi ; Firdosy, Samad A. ; Star, Kurt E. ; Fleurial, Jean Pierre ; Ravi, Vilupanur A. ; Liu, Zi-kui. / Thermodynamic modeling of the La-Te system aided by first-principles calculations. In: Calphad: Computer Coupling of Phase Diagrams and Thermochemistry. 2018 ; Vol. 61. pp. 227-236.
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Thermodynamic modeling of the La-Te system aided by first-principles calculations. / Hu, Yong Jie; Paz Soldan Palma, Jorge; Wang, Yi; Firdosy, Samad A.; Star, Kurt E.; Fleurial, Jean Pierre; Ravi, Vilupanur A.; Liu, Zi-kui.

In: Calphad: Computer Coupling of Phase Diagrams and Thermochemistry, Vol. 61, 01.06.2018, p. 227-236.

Research output: Contribution to journalArticle

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AU - Star, Kurt E.

AU - Fleurial, Jean Pierre

AU - Ravi, Vilupanur A.

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