Thermodynamic Assessment of the Pt-Sb System

Jinming Liu, Yinghui Zhang, Cuiping Guo

Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, China.
School of Material Science and Engineering, Jiangxi University of Science and Technology, Ganzhou, China.

DOI: 10.4236/ijnm.2013.23013                

Abstract

The Pt-Sb system was critically assessed by means of CALPHAD technique. Based on the experimental data in the literature, the excess Gibbs energies of the solution phases (liquid, rhombohedral, fcc) were modeled with the Redlich-Kister equation. The five intermetallic compounds, Pt₇Sb, Pt3Sb, Pt₃Sb₂, PtSb, and PtSb₂ were treated as stochiometric compounds and expressed as the formula (Pt)_m(Sb)_n. The intermetallic compound, Pt₅Sb with a homogenerity ranges 0.155 - 0.189 Sb, were treated as the formula (Pt,Sb)_m(Pt,Sb)_n. A set of self-consistent thermodynamic parameters of the Pt-Sb system was obtained.

Keywords

Pt-Sb Phase Diagram; Thermodynamic Assessment; Thermodynamic Properties; CALPHAD Technique

Conflicts of Interest

The authors declare no conflicts of interest.

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