Thermodynamic modeling of the V-Cr-Si system

N. Chaia; N. David; J. M. Fiorani; S. Mathieu; M. Vilasi

doi:10.1016/j.calphad.2015.01.004

Thermodynamic modeling of the V-Cr-Si system

N. Chaia, N. David, J. M. Fiorani, S. Mathieu, M. Vilasi

Nancy Université

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

Abstract

In the present work, an assessment of the V-Cr-Si system was done. Mainly based on previously ternary experimental data on the isothermal section at 1200 °C and on the liquid-solid equilibria, a thermodynamic modeling of the ternary system was performed within the CALPHAD approach using the Thermo-Calc and the Pandat software packages and taking into account data from existing assessment of binary sub-systems. Four intermediate phases were considered as stoichiometric compounds (Cr,V)_x(Si)_y with substitution of Cr and V at Si ratio constant: (Cr,V)Si, (Cr,V)₅Si₃, (Cr,V)₁₁Si₈ and (Cr,V)₆Si₅. Two others phases (Cr,V)Si₂ and (Cr,V)₃Si presenting a slight domain of homogeneity, were described as (Cr,Si,V)₁(Cr,Si)₂ and (Cr,Si,V)₃(Cr,Si,V)₁ respectively. The metallic liquid phase and the terminal solid solutions of chromium and vanadium were described by the disordered solutions model as (Cr,Si,V)₁(Va)₃. The silicon admitting any solubility, its description was limited to (Si). The resulting thermodynamic optimization led to a good agreement with experimental data.

Original language	English
Pages (from-to)	166-174
Number of pages	9
Journal	Calphad: Computer Coupling of Phase Diagrams and Thermochemistry
Volume	48
DOIs	https://doi.org/10.1016/j.calphad.2015.01.004
Publication status	Published - 1 Jan 2015
Externally published	Yes

Keywords

CALPHAD modeling
Intermetallics
Phase diagram
Silicides
Thermodynamics

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10.1016/j.calphad.2015.01.004

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title = "Thermodynamic modeling of the V-Cr-Si system",

abstract = "In the present work, an assessment of the V-Cr-Si system was done. Mainly based on previously ternary experimental data on the isothermal section at 1200 °C and on the liquid-solid equilibria, a thermodynamic modeling of the ternary system was performed within the CALPHAD approach using the Thermo-Calc and the Pandat software packages and taking into account data from existing assessment of binary sub-systems. Four intermediate phases were considered as stoichiometric compounds (Cr,V)x(Si)y with substitution of Cr and V at Si ratio constant: (Cr,V)Si, (Cr,V)5Si3, (Cr,V)11Si8 and (Cr,V)6Si5. Two others phases (Cr,V)Si2 and (Cr,V)3Si presenting a slight domain of homogeneity, were described as (Cr,Si,V)1(Cr,Si)2 and (Cr,Si,V)3(Cr,Si,V)1 respectively. The metallic liquid phase and the terminal solid solutions of chromium and vanadium were described by the disordered solutions model as (Cr,Si,V)1(Va)3. The silicon admitting any solubility, its description was limited to (Si). The resulting thermodynamic optimization led to a good agreement with experimental data.",

keywords = "CALPHAD modeling, Intermetallics, Phase diagram, Silicides, Thermodynamics",

author = "N. Chaia and N. David and Fiorani, \{J. M.\} and S. Mathieu and M. Vilasi",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

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day = "1",

doi = "10.1016/j.calphad.2015.01.004",

language = "English",

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T1 - Thermodynamic modeling of the V-Cr-Si system

AU - Chaia, N.

AU - David, N.

AU - Fiorani, J. M.

AU - Mathieu, S.

AU - Vilasi, M.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - In the present work, an assessment of the V-Cr-Si system was done. Mainly based on previously ternary experimental data on the isothermal section at 1200 °C and on the liquid-solid equilibria, a thermodynamic modeling of the ternary system was performed within the CALPHAD approach using the Thermo-Calc and the Pandat software packages and taking into account data from existing assessment of binary sub-systems. Four intermediate phases were considered as stoichiometric compounds (Cr,V)x(Si)y with substitution of Cr and V at Si ratio constant: (Cr,V)Si, (Cr,V)5Si3, (Cr,V)11Si8 and (Cr,V)6Si5. Two others phases (Cr,V)Si2 and (Cr,V)3Si presenting a slight domain of homogeneity, were described as (Cr,Si,V)1(Cr,Si)2 and (Cr,Si,V)3(Cr,Si,V)1 respectively. The metallic liquid phase and the terminal solid solutions of chromium and vanadium were described by the disordered solutions model as (Cr,Si,V)1(Va)3. The silicon admitting any solubility, its description was limited to (Si). The resulting thermodynamic optimization led to a good agreement with experimental data.

AB - In the present work, an assessment of the V-Cr-Si system was done. Mainly based on previously ternary experimental data on the isothermal section at 1200 °C and on the liquid-solid equilibria, a thermodynamic modeling of the ternary system was performed within the CALPHAD approach using the Thermo-Calc and the Pandat software packages and taking into account data from existing assessment of binary sub-systems. Four intermediate phases were considered as stoichiometric compounds (Cr,V)x(Si)y with substitution of Cr and V at Si ratio constant: (Cr,V)Si, (Cr,V)5Si3, (Cr,V)11Si8 and (Cr,V)6Si5. Two others phases (Cr,V)Si2 and (Cr,V)3Si presenting a slight domain of homogeneity, were described as (Cr,Si,V)1(Cr,Si)2 and (Cr,Si,V)3(Cr,Si,V)1 respectively. The metallic liquid phase and the terminal solid solutions of chromium and vanadium were described by the disordered solutions model as (Cr,Si,V)1(Va)3. The silicon admitting any solubility, its description was limited to (Si). The resulting thermodynamic optimization led to a good agreement with experimental data.

KW - CALPHAD modeling

KW - Intermetallics

KW - Phase diagram

KW - Silicides

KW - Thermodynamics

U2 - 10.1016/j.calphad.2015.01.004

DO - 10.1016/j.calphad.2015.01.004

M3 - Article

AN - SCOPUS:84921769897

SN - 0364-5916

VL - 48

SP - 166

EP - 174

JO - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

JF - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

ER -

Thermodynamic modeling of the V-Cr-Si system

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Keywords

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