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Thermodynamic Modeling of the Co-Cu-Sn Ternary System

Thermodynamic Modeling of the Co-Cu-Sn Ternary System The Co-Cu-Sn ternary system has been modeled based on reported phase equilibrium data in the literature using the CALPHAD (CALculation of PHAse Diagrams) method. The excess Gibbs energies of solution phases, including liquid, Bcc, Fcc and Hcp, are expressed by the Redlich-Kister polynomial. The two-sublattice model (Co,Cu)m(Sn)n is used to describe the solid solution of binary intermetallic compounds, i.e. CoSn3, CoSn2 Cu3Sn and βCu6Sn5 in the Co-Cu-Sn ternary system. Co3Sn2 was described using the four-sublattice model (Co,Cu,Sn)1(Cu,Sn)1(Co,Va)0.5(Co,Va)0.5. The ternary stoichiometric compound Co2Cu8Sn3 is modeled by the stoichiometric model, Co2Cu7.5Sn3. Finally, a set of self-consistent parameters which can describe the thermodynamics of the Co-Cu-Sn ternary system was obtained. Based on the calculated thermodynamic parameters, the liquidus projection and reaction scheme are also derived in the present work. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Phase Equilibria and Diffusion Springer Journals

Thermodynamic Modeling of the Co-Cu-Sn Ternary System

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References (131)

Publisher
Springer Journals
Copyright
Copyright © ASM International 2022
ISSN
1547-7037
eISSN
1863-7345
DOI
10.1007/s11669-022-00953-w
Publisher site
See Article on Publisher Site

Abstract

The Co-Cu-Sn ternary system has been modeled based on reported phase equilibrium data in the literature using the CALPHAD (CALculation of PHAse Diagrams) method. The excess Gibbs energies of solution phases, including liquid, Bcc, Fcc and Hcp, are expressed by the Redlich-Kister polynomial. The two-sublattice model (Co,Cu)m(Sn)n is used to describe the solid solution of binary intermetallic compounds, i.e. CoSn3, CoSn2 Cu3Sn and βCu6Sn5 in the Co-Cu-Sn ternary system. Co3Sn2 was described using the four-sublattice model (Co,Cu,Sn)1(Cu,Sn)1(Co,Va)0.5(Co,Va)0.5. The ternary stoichiometric compound Co2Cu8Sn3 is modeled by the stoichiometric model, Co2Cu7.5Sn3. Finally, a set of self-consistent parameters which can describe the thermodynamics of the Co-Cu-Sn ternary system was obtained. Based on the calculated thermodynamic parameters, the liquidus projection and reaction scheme are also derived in the present work.

Journal

Journal of Phase Equilibria and DiffusionSpringer Journals

Published: Apr 1, 2022

Keywords: CALPHAD; Co-Cu-Sn system; gibbs energy; phase equilibria; thermodynamic

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