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Vanadium activity measurement in fcc phase Pt-V alloy
- Issue Date
- 5-6월-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Activity coefficient; Excess Gibbs energy; Pt-V alloy; Thermodynamics
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.788, pp.967 - 971
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 788
- Start Page
- 967
- End Page
- 971
- ISSN
- 0925-8388
- 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 V2O3 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 (gamma(nu)) increased. The activity coefficient at infinite dilution (gamma(0)(nu)) increased and the interaction parameter (epsilon(V)(V)) decreased with rising temperature. The excess Gibbs energy value for the fcc phase Pt-V alloy was strongly negative. (C) 2019 Elsevier B.V. All rights reserved.
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