Thermodynamic optimization of the Sm-Sn binary system
JIANG Yun1, HUANG Guoxing2, ZHENG Linghong2, LIU Libin2, ZHANG Ligang2
1. Hunan Sushi Guangbo Testing Techniques Co., Ltd, Changsha 410000, China; 2. School of Materials Science and Engineering, Central South University, Changsha 410083, China
Abstract：Based on the comprehensive evaluation of experimental data of Sm-Sn system, the equilibrium phase diagram of the binary alloy system was optimized and calculated by CALPHAD method. The liquid phase was described by the substitutional solution model, and the thermodynamic functions of stoichiometric intermediate compounds were explained by the Neumann-Kopp rule. Through optimization, a set of thermodynamic parameters with self-consistency are obtained. The phase diagrams calculated by the thermodynamic parameters coincide with the experimental information reported in the literature. The calculated liquid mixing enthalpy in 1 203 K and solid phase formation enthalpy in 295 K are also in good agreement with the existing thermochemical data.
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2019, Vol. 24 
