Enthalpies of mixing of liquid In–Sn and In–Sn–Zn alloys

Partial and integral enthalpies of mixing of liquid ternary In–Sn–Zn alloys were determined at 500 °C along seven sections over a large composition range. Additionally, binary alloys of the constituent system In–Sn were investigated at the same temperature. The measurements were carried out using a Calvet-type microcalorimeter and a drop calorimetric technique. 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.