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Thermodynamic description of the Cu–Sn system

Published online by Cambridge University Press:  31 January 2011

Wojcieh Gierlotka ,
Sinn-wen Chen  and
Shih-kang Lin
Wojcieh Gierlotka
Affiliation:
Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 300, Taiwan; and Non-Ferrous Metals Department, Akademia Górniczo-Hutnicza (AGH) University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland
Sinn-wen Chen*
Affiliation:
Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 300, Taiwan
Shih-kang Lin
Affiliation:
Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 300, Taiwan
*
a)Address all correspondence to this author. e-mail: swchen@che.nthu.edu.tw
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Abstract

The Cu–Sn binary system is important for various applications, especially for recent developments in the electronics packaging industry. The ϵ-Cu3Sn and η-Cu6Sn5 (η′ phases) phases are frequently encountered in electronics products. However, the two phases have been described as line compounds in previous thermodynamic modeling, and their compositional homogeneities were not considered. In this study, the thermodynamic properties of the Cu–Sn binary system are modeled and the phase diagram is calculated by the CALPHAD method, using experimental information reported in the literature. The ϵ and η (η′) phases are described using compound energy models with two and three sublattices, respectively, so that their compositional homogeneities could be calculated. Good agreement was observed between the calculated result and the existing experimental data.

Keywords

CuPhase equilibriaSn
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 11 , November 2007 , pp. 3158 - 3165
Copyright
Copyright © Materials Research Society 2007

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