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Vanadium activity measurement in fcc phase Pt-V alloy

Authors
Park, Dong HwiJeong, Ji-SeokShim, Sang-ChulLee, Joonho
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
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/64795
DOI
10.1016/j.jallcom.2019.02.313
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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