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Materials Science and Engineering of Powder Metallurgy >

2022 , Vol. 27 >Issue 3: 246 - 256

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2022003

Theoretical Research

Thermodynamic investigation on the Pd-X(X=Ag, Ni, Sn) systems of the precious metals

  • LIAO Lin ,
  • LIU Shuhong ,
  • DU Yong
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  • State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Received date: 2022-01-11

  Revised date: 2022-03-12

  Online published: 2022-03-25

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Abstract

Based on the critical re-assessment on the phase diagram and thermodynamic data available in literature of the Pd-X(X=Ag, Ni, Sn) systems, Gibbs energies of the liquid and FCC_A1 phases in three binary systems were described by the substitutional solution model. Three phase, PdSn2, PdSn3 and PdSn4,were described by the sublattice model of (Pd,Sn)1Sn2, (Pd)0.25(Pd,Sn)0.75, and (Pd)0.2(Pd,Sn)0.8, respectively. Thermodynamic parameters for the Pd-X(X=Ag, Ni, Sn) systems were then obtained by the CALPHAD (calculation of phase diagram) approach. The presently obtained thermodynamic parameters can describe the measured phase diagram and thermodynamic properties more reasonably comparing with the previous reports, especially in the phase diagram of Pd-Ag system and enthalpies of mixing of FCC_A1 in both Pd-Ag and Pd-Ni systems, as well as the Sn-rich side of the phase diagram of the Pd-Sn system. Comprehensive comparisons between the calculated results and experimental data indicated the accuracy of the presently obtained thermodynamic parameters.

Key words： Pd-X (X=Ag,Ni,Sn); CALPHAD; phase diagrams; thermodynamic property

Cite this article

LIAO Lin , LIU Shuhong , DU Yong . Thermodynamic investigation on the Pd-X(X=Ag, Ni, Sn) systems of the precious metals[J]. Materials Science and Engineering of Powder Metallurgy, 2022 , 27(3) : 246 -256 . DOI: 10.19976/j.cnki.43-1448/TF.2022003

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