Thermodynamic Properties and Thermodynamic Assessment of Ta-Sn System

Abstract:

For the little thermodynamic information of Ta-Sn system, the liquid mixing enthalpy of Ta-Sn system, and the formation enthalpy of Ta₂Sn₃ and Ta₃Sn were calculated by Miedema model. The Ta-Sn phase diagram was modeled using CALPHAD technology to obtain a reliable thermodynamic description of the system. Two intermetallic compounds Ta₂Sn and Ta₃Sn were treated as stoichiometric compounds for the very narrow homogeneity ranges. The higher temperature phase diagram of Ta-Sn system was constructed according to Nb-Sn system for the empty information. The optimization process was carried out using the PARRAT software including in Thermo-Calc database system. The thermodynamic calculated Ta-Sn phase diagram is agreement with the evaluated phase diagram, and the calculated mixing enthalpies of molten Ta-Sn system match well with the Miedema data. The formation enthalpies of the two intermetallic compounds Ta₂Sn and Ta₃Sn are compared with the Miedema values.

• Periodical: Advanced Materials Research (Volumes 821-822)
• Pages: 849-853
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.821-822.849
• Online since: September 2013
• Authors: Jian Li Wang, Bi Yang Tuo, Xun Pu Hu, Zhu Lin Liu
• Keywords: Enthalpy, Miedema Model, Ta-Sn System, Thermodynamic

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