Phase Equilibria of the La-Ni-Cu Ternary System at 673 K: Thermodynamic Modeling and Experimental Validation

Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Phase equilibria and thermodynamic properties in the La-Ni-Cu ternary system were studied by coupling thermodynamic modeling and experimental validation. A set of self-consistent thermodynamic descriptions for phases in the La-Ni-Cu system were obtained on the basis of those of three constituent binaries and ternary experimental data in literature. The isothermal section at 673 K and the enthalpy of mixing of liquid calculated from the currently established ternary thermodynamic description were compared favorably with available experimental data. Three alloy samples in the La-Ni-Cu system were then selected, synthesized and annealed at 673 K in order to further validate the calculated phase equilibria. These alloys were analyzed with ICP, XRD, OM, SEM/BSE and EDS, and the experimental results agreed well with the calculated phase equilibrium relationships.

Original languageEnglish
Title of host publicationSupplemental Proceedings
Subtitle of host publicationMaterials Fabrication, Properties, Characterization, and Modeling
PublisherJohn Wiley and Sons Inc.
Pages441-447
Number of pages7
Volume2
ISBN (Electronic)9781118062142
ISBN (Print)9781118029466
DOIs
StatePublished - Apr 20 2011
Externally publishedYes

Keywords

  • Hydrogen storage alloys
  • La-Ni-Cu system
  • Phase diagram
  • Thermodynamic modeling

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