A thermodynamic modeling of the Cr-Nb-Ni system

Yong Du; Shuhong Liu; Y. A. Chang; Ying Yang

doi:10.1016/j.calphad.2005.06.001

A thermodynamic modeling of the Cr-Nb-Ni system

Yong Du, Shuhong Liu, Y. A. Chang, Ying Yang

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

23 Scopus citations

Abstract

This paper provides a consistent thermodynamic data set for the whole Cr-Nb-Ni ternary system via thermodynamic modeling. All of the experimental phase diagram data available from the literature are critically reviewed and assessed using thermodynamic models for the Gibbs energies of individual phases. The ternary liquid and (Ni) phases are described with a regular solution model. The two-sublattice model is used to model the binary phases NbCr ₂(HT), NbCr₂(LT), NbNi₃, and Nb ₆Ni₇. In order to reproduce the measured solid solubilities in the ternary system and to reduce the number of adjustable parameters, the third element is assumed to be anti-site atoms in only one sublattice. Optimal thermodynamic parameters are obtained by considering reliable literature data. Comprehensive comparisons between calculated and measured phase diagrams show that all the accurate experimental information is satisfactorily accounted for by the present thermodynamic description. The thermodynamic parameters obtained can also describe the diffusion paths observed for the diffusion couples between Nb and several Cr-Ni alloys annealed at 1002 ^°C.

Original language	English
Pages (from-to)	140-148
Number of pages	9
Journal	Calphad: Computer Coupling of Phase Diagrams and Thermochemistry
Volume	29
Issue number	2
DOIs	https://doi.org/10.1016/j.calphad.2005.06.001
State	Published - Jun 2005
Externally published	Yes

Funding

The present work was supported by the National Outstanding Youth Science Foundation of China (Grant No. 50425103), and the National Advanced Materials Committee of China (Grant No. 2003AA302520). Financial support from the Accelerated Insertion of Materials Program of DARPA and USAF through the contract F33615-00-C-5215 is also appreciated. Y. Du gratefully acknowledges the Furong Chair Professorship program released by Hunan Province of P.R. China for financial support. The Thermo-Calc program developed by Thermo-Calc software AB Company of Sweden is gratefully acknowledged.

Funders	Funder number
Hunan Province of P.R. China
National Advanced Materials Committee of China	2003AA302520
Defense Advanced Research Projects Agency
U.S. Air Force	F33615-00-C-5215
National Outstanding Youth Foundation of China	50425103

Keywords

Cr-Nb-Ni system
Phase diagram
Thermodynamic calculation

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10.1016/j.calphad.2005.06.001

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abstract = "This paper provides a consistent thermodynamic data set for the whole Cr-Nb-Ni ternary system via thermodynamic modeling. All of the experimental phase diagram data available from the literature are critically reviewed and assessed using thermodynamic models for the Gibbs energies of individual phases. The ternary liquid and (Ni) phases are described with a regular solution model. The two-sublattice model is used to model the binary phases NbCr 2(HT), NbCr2(LT), NbNi3, and Nb 6Ni7. In order to reproduce the measured solid solubilities in the ternary system and to reduce the number of adjustable parameters, the third element is assumed to be anti-site atoms in only one sublattice. Optimal thermodynamic parameters are obtained by considering reliable literature data. Comprehensive comparisons between calculated and measured phase diagrams show that all the accurate experimental information is satisfactorily accounted for by the present thermodynamic description. The thermodynamic parameters obtained can also describe the diffusion paths observed for the diffusion couples between Nb and several Cr-Ni alloys annealed at 1002 °C.",

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N2 - This paper provides a consistent thermodynamic data set for the whole Cr-Nb-Ni ternary system via thermodynamic modeling. All of the experimental phase diagram data available from the literature are critically reviewed and assessed using thermodynamic models for the Gibbs energies of individual phases. The ternary liquid and (Ni) phases are described with a regular solution model. The two-sublattice model is used to model the binary phases NbCr 2(HT), NbCr2(LT), NbNi3, and Nb 6Ni7. In order to reproduce the measured solid solubilities in the ternary system and to reduce the number of adjustable parameters, the third element is assumed to be anti-site atoms in only one sublattice. Optimal thermodynamic parameters are obtained by considering reliable literature data. Comprehensive comparisons between calculated and measured phase diagrams show that all the accurate experimental information is satisfactorily accounted for by the present thermodynamic description. The thermodynamic parameters obtained can also describe the diffusion paths observed for the diffusion couples between Nb and several Cr-Ni alloys annealed at 1002 °C.

AB - This paper provides a consistent thermodynamic data set for the whole Cr-Nb-Ni ternary system via thermodynamic modeling. All of the experimental phase diagram data available from the literature are critically reviewed and assessed using thermodynamic models for the Gibbs energies of individual phases. The ternary liquid and (Ni) phases are described with a regular solution model. The two-sublattice model is used to model the binary phases NbCr 2(HT), NbCr2(LT), NbNi3, and Nb 6Ni7. In order to reproduce the measured solid solubilities in the ternary system and to reduce the number of adjustable parameters, the third element is assumed to be anti-site atoms in only one sublattice. Optimal thermodynamic parameters are obtained by considering reliable literature data. Comprehensive comparisons between calculated and measured phase diagrams show that all the accurate experimental information is satisfactorily accounted for by the present thermodynamic description. The thermodynamic parameters obtained can also describe the diffusion paths observed for the diffusion couples between Nb and several Cr-Ni alloys annealed at 1002 °C.

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A thermodynamic modeling of the Cr-Nb-Ni system

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