Mixing enthalpies of liquid Au–Sb–Sn alloys

Abstract

Using a MHTC 96 Setaram high-temperature drop calorimeter, partial and integral enthalpies of liquid alloy mixing were determined in the ternary Au–Sb–Sn system. The alloys were investigated along three cross sections at two different temperatures: 923 and 1,078 K. Experimental data were used to find ternary interaction parameters by applying the Redlich-Kister-Muggianu model for substitutional solutions, and a full set of parameters describing the concentration dependence of the mixing enthalpy was derived. It was found that the entire system shows exothermic mixing enthalpy at the given temperature. Moreover, experimental data indicate that the mixing heat in this system is temperature independent, at least in the measured temperature range. .