Thermodynamic Analysis of Phase Equilibria in the Mg-Al-Ho Ternary System

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Abstract

A thermodynamic analysis of phase equilibria in the Mg–Al–Ho ternary system has been carried out with special emphasis on the metastable phase separation of the hexagonal close-packed (hcp) phase. In this study, the Gibbs free energy of mixing of the hcp phase was evaluated using first-principles calculations combined with the cluster variation method (CVM), and the obtained results as well as the available experimental data were introduced into the analysis. The calculated results enabled the reproduction of experimental results on both the phase equilibria and the thermodynamic properties obtained from the first-principles calculations and the CVM. In addition, the calculations indicated a tendency for metastable two-phase separation in the hcp phase between the Mg-rich corner and the Al–Ho binary side, which was similar to the Mg–Y–Zn ternary system shown in our previous work.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 54(5), 647-655, 2013-05-01

    The Japan Institute of Metals and Materials

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Codes

  • NII Article ID (NAID)
    10031168405
  • NII NACSIS-CAT ID (NCID)
    AA1151294X
  • Text Lang
    ENG
  • Article Type
    REV
  • ISSN
    13459678
  • NDL Article ID
    024456199
  • NDL Call No.
    Z53-J286
  • Data Source
    CJP  NDL  J-STAGE 
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