Thermodynamic Calculation of Bi-Au-Lu, Nd Ternary Systems

Abstract:

With available melting point and hardness, the Bi-based filler alloy is considered as one choice of high-temperature Pb-free solder. Phase diagram can play an important role in the design of new type of Pb-free solder.In the present work, the thermodynamic assessments of the Au-Nd and the Au-Lu binary systems have been carried out by the Calculation of Phase Diagram (CALPHAD) method based on the available experimental data. The Gibbs free energies of the solution phases were described by subregular solution models with the Redlich-Kister equation, and those of the intermetallic compounds were described by sublattice models. A set of self-consistent and reasonable thermodynamic parameters is obtained for the binary systems, which describes the Gibbs energies of the solution phases and the intermetallic compounds phases. Additionally, combined the reported Bi-Au, Bi-Lu and Bi-Nd binary systems, the thermodynamic database of the Bi-Au-Lu and the Bi-Au-Nd ternary systems have been developed, which will provide important thermodynamic information for the phase equilibria of the multicomponent Bi-based alloy systems.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 444-451
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.444
• Online since: March 2016
• Authors: Shu Liang Wang, Lu Jiang Zhou, Jia Lian Li, Xiao Hong Wang, Yuan Hua Lin, Xing Jun Liu
• Keywords: Bi-Based Alloy, CALPHAD Method, Ternary System, Thermodynamic Database

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