Sm-Sn二元体系的热力学优化

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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.

Key words： Sm-Sn phase diagram calculation thermodynamic assessment CALPHAD binary alloy

Received: 28 February 2019 Published: 12 July 2019

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	Articles by authors
	JIANG Yun
	HUANG Guoxing
	ZHENG Linghong
	LIU Libin
	ZHANG Ligang

Cite this article:

JIANG Yun,HUANG Guoxing,ZHENG Linghong, et al. Thermodynamic optimization of the Sm-Sn binary system[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(4): 303-307.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I4/303

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