Vanadium activity measurement in fcc phase Pt-V alloy

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

doi:10.1016/j.jallcom.2019.02.313

Vanadium activity measurement in fcc phase Pt-V alloy

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

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 (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 language	English
Pages (from-to)	967-971
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	788
DOIs	https://doi.org/10.1016/j.jallcom.2019.02.313
Publication status	Published - 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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title = "Vanadium activity measurement in fcc phase Pt-V alloy",

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 (γV) increased. The activity coefficient at infinite dilution (γVo) increased and the interaction parameter (εVV) decreased with rising temperature. The excess Gibbs energy value for the fcc phase Pt-V alloy was strongly negative.",

keywords = "Activity coefficient, Excess Gibbs energy, Pt-V alloy, Thermodynamics",

author = "Park, {Dong Hwi} and Jeong, {Ji Seok} and Shim, {Sang Chul} and Joonho Lee",

note = "Funding Information: This work was supported by the Technology Innovation Program (Grant No. 10063488 ), and by a Korea Institute for Advancement of Technology grant, funded by the Korea Government ( MOTIE ) ( P0002019 ), as part of the Competency Development Program for Industry Specialists. ",

year = "2019",

month = jun,

day = "5",

doi = "10.1016/j.jallcom.2019.02.313",

language = "English",

volume = "788",

pages = "967--971",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

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T1 - Vanadium activity measurement in fcc phase Pt-V alloy

AU - Park, Dong Hwi

AU - Jeong, Ji Seok

AU - Shim, Sang Chul

AU - Lee, Joonho

N1 - Funding Information: This work was supported by the Technology Innovation Program (Grant No. 10063488 ), and by a Korea Institute for Advancement of Technology grant, funded by the Korea Government ( MOTIE ) ( P0002019 ), as part of the Competency Development Program for Industry Specialists.

PY - 2019/6/5

Y1 - 2019/6/5

N2 - 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 (γV) increased. The activity coefficient at infinite dilution (γVo) increased and the interaction parameter (εVV) decreased with rising temperature. The excess Gibbs energy value for the fcc phase Pt-V alloy was strongly negative.

AB - 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 (γV) increased. The activity coefficient at infinite dilution (γVo) increased and the interaction parameter (εVV) decreased with rising temperature. The excess Gibbs energy value for the fcc phase Pt-V alloy was strongly negative.

KW - Activity coefficient

KW - Excess Gibbs energy

KW - Pt-V alloy

KW - Thermodynamics

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