The partial and integral enthalpy of mixing of molten ternary Co–Sb–Sn alloys was determined performing high temperature drop calorimetry in a large compositional range at 1273 K. Measurements have been done along five sections, xSb/xSn ≈ 1:1, xSb/xSn ≈ 1:3, xSb/xSn ≈ 3:1, xCo/xSn ≈ 1:4, and xCo/xSb ≈ 1:5. Additionally, binary alloys of the constituent systems Co–Sb and Co–Sn were investigated at the same temperature. All the binary data were evaluated by means of a standard Redlich–Kister polynomial fit whereas ternary data were fitted on the basis of an extended Redlich–Kister–Muggianu model for substitutional solutions. An iso-enthalpy plot of the ternary system was constructed. In addition, the extrapolation Model of Toop was applied and compared to our data.

中文翻译：

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用于无铅焊接的液体系统混合焓：Co-Sb-Sn

熔融三元 Co-Sb-Sn 合金的部分和整体混合焓是通过在 1273 K 的大成分范围内进行高温滴量热法确定的。测量已沿五个部分进行，xSb/xSn ≈ 1:1，xSb/ xSn ≈ 1:3，xSb/xSn ≈ 3:1，xCo/xSn ≈ 1:4，xCo/xSb ≈ 1:5。此外，在相同温度下研究了组成系统 Co-Sb 和 Co-Sn 的二元合金。所有二元数据均通过标准 Redlich-Kister 多项式拟合进行评估，而三元数据则基于替代解的扩展 Redlich-Kister-Muggianu 模型拟合。构建了三元系统的等焓图。此外，还应用了 Toop 的外推模型并与我们的数据进行了比较。