Experimental investigation and thermodynamic calculation of the phase equilibria in the Co-Mo-W system

C. P. Wang, J. Wang, S. H. Guo, X. J. Liu, Ikuo Ohnuma, R. Kainuma, K. Ishida

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The isothermal sections in the Co-Mo-W ternary system at 600 °C, 800 °C, 1000 °C, 1100 °C, 1200 °C and 1300 °C have been determined using the Electron probe micro-analyzer (EPMA) and X-ray diffraction (XRD) techniques. A thermodynamic assessment of the Co-Mo-W ternary system was carried out by the CALPHAD (Calculation of Phase Diagrams) method. The Gibbs free energies of the liquid and solution phases were described by the subregular solution models, and those of intermetallic compounds were described by the sublattice model. A consistent set of thermodynamic parameters has been derived for describing the Gibbs free energies of each solution phase and intermetallic compound in the Co-Mo-W ternary system. The calculated phase diagrams and thermodynamic properties in the Co-Mo-W ternary system are in good agreement with experimental data.

Original languageEnglish
Pages (from-to)642-650
Number of pages9
JournalIntermetallics
Volume17
Issue number8
DOIs
Publication statusPublished - 2009 Aug 1

Keywords

  • A. Ternary alloy systems
  • B. Phase diagrams
  • F. Electron microprobe

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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