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Thermodynamic description of the Eu–Ga system using substitutional solution and associate models

  • Fei Li , Jinming Liu , Qugang Li , Chengjun Guo , Xu Zhang and Jian Xiao
Published/Copyright: March 16, 2020
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 111 Issue 3

Abstract

The Eu–Ga system is first optimized by the CALculation of PHAse Diagrams (CALPHAD) technique based on the experimental data in the literature. The associate model for the liquid phase is tested and compared with the substitutional solution model given the asymmetric shape of the liquid in the Eu–Ga phase diagram. Description results show that the associate model achieved better consistency with the available experimental data than the substitutional model. The liquid significantly deviates from the regular solution and shows association between Eu and Ga. The excess Gibbs energies of the solution phases (e. g., liquid, bcc, orthorhombic) are modeled through the Redlich–Kister polynomial functions. Intermetallics, such as Eu5Ga3, EuGa, Eu2Ga3, EuGa2, Eu2Ga5, and EuGa4, are treated as stoichiometric compounds. This work shows that the Eu–Ga system hosts two eutectic, five peritectic, and one congruent reactions. Two sets of parameters for self-consistent thermodynamic description of the Eu–Ga binary system are obtained.

Keywords: Eu–Ga system; Thermodynamic properties; CALPHAD technique; Associate model
∗ Correspondence address, Dr. Jinming Liu, School of Material Science and Engineering Jiangxi University of Science and Technology, Ganzhou, 341000, P.R. China, Tel.: +86 797 831 2151, E-mail:

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Received: 2019-06-13
Accepted: 2019-10-01
Published Online: 2020-03-16
Published in Print: 2020-03-11

© 2020, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111868
Keywords for this article
Eu–Ga system; Thermodynamic properties; CALPHAD technique; Associate model

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. A new Board of Managing Editors for IJMR
  5. Original Contributions
  6. Carbon nanotube network as an electron pathway in nanocomposite films
  7. Optimization of bamboo mesoparticle/nylon 6 composite mechanical properties using a response surface methodology
  8. Thermodynamic description of the Eu–Ga system using substitutional solution and associate models
  9. Effects of minor additions of cerium, silicon and calcium on microstructure and mechanical properties of AZ91 magnesium alloy
  10. Localized electron microscopy analysis of steel corrosion processes in the presence of zinc phosphate flake-type particles
  11. The effect of pulse frequency on the microstructure and surface mechanical properties of composite coatings on the surface of AISI304
  12. Short Communications
  13. Facile preparation of single phase high-entropy oxide nanocrystalline powders by solution combustion synthesis
  14. Original Contributions
  15. Rapid synthesis of high-purity Al4SiC4 powder by microwave hybrid heating
  16. Investigation of microstructure and mechanical properties of Al2O3 and granite-powder-reinforced Al7075 hybrid composite
  17. Effect of annealing temperature on size and optical properties of CH3NH3PbI3 nanowires
  18. Chemical bioactivation of titanium surface for dental implants
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  20. DGM News
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