Phase Equilibria of the Sn-Sb Binary System |
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| Authors: | Sinn-Wen Chen Chih-Chi Chen Wojcieh Gierlotka An-Ren Zi Po-Yin Chen Hsin-Jay Wu |
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| Affiliation: | (1) Department of Chemical Engineering, National Tsing Hua University, #101, Sec. 2, Kuang-Fu Road, Hsin-Chu, 300, Taiwan;(2) Non-Ferrous Metals Department, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland |
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| Abstract: | Sn-Sb alloys are important high-temperature solders. However, inconsistencies are found in the available phase diagrams, and some phase boundaries in the Sn-Sb system have not been determined. Sn-Sb alloys were prepared, equilibrated at 160°C to 300°C, and the equilibrium phases and their compositions were determined. The β-SnSb phase has a very wide compositional homogeneity range, and its composition varies from Sn-47.0at.%Sb to Sn-62.8at.%Sb. There is no order–disorder transformation of the β-SnSb phase. There are three peritectic reactions in the Sn-Sb system, L + Sb = β-SnSb, L + β-SnSb = Sn3Sb2, and L + Sn3Sb2 = Sn, and their temperatures are 424°C, 323°C, and 243°C, respectively. Thermodynamic models of the Sn-Sb binary system were developed using the CALPHAD approach based on the experimental results of this study and the data in the literature. The calculated phase diagram and thermodynamic properties are in good agreement with the experimental determinations. |
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| Keywords: | Sn Sb DTA CALPHAD thermodynamics |
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