Vanadium activity measurement in fcc phase Pt-V alloy

Dong Hwi Park, Ji Seok Jeong, Sang Chul Shim, Joonho Lee

Research output: Contribution to journalArticle

Abstract

The temperature dependence of the thermodynamic properties of V, in Pt-V alloy, was investigated in this study. A Pt strip was equilibrated with V 2 O 3 powder, under controlled oxygen partial pressure and temperature. The mole fraction of V in the sample was measured with an electron probe micro-analyzer, and the activity coefficient of V was determined as a function of temperature and composition. With increasing temperature, the activity coefficient of V (γ V ) increased. The activity coefficient at infinite dilution (γ V o ) increased and the interaction parameter (ε V V ) decreased with rising temperature. The excess Gibbs energy value for the fcc phase Pt-V alloy was strongly negative.

Original languageEnglish
Pages (from-to)967-971
Number of pages5
JournalJournal of Alloys and Compounds
Volume788
DOIs
Publication statusPublished - 2019 Jun 5

Keywords

  • Activity coefficient
  • Excess Gibbs energy
  • Pt-V alloy
  • Thermodynamics

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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