Enthalpies of mixing of liquid Ga-In and Cu-Ga-In alloys

Abstract

A literature overview of Cu-Ga-In system shows that the information about the liquid phase of this system does not exist. Therefore, using MHTC 96 Setaram high temperature drop calorimeter, partial and integral enthalpies of mixing of liquid alloys were determined at first in the binary Ga-In system and next in the ternary Cu-Ga-In system. The ternary liquid alloys were investigated along two cross-sections at three temperatures: 1123 K, 1273 K and 1423 K. Experimental data were used to find ternary interaction parameters by applying the Redlich–Kister–Muggianu model for substitutional solutions, and consequently providing a full set of parameters describing the concentration dependence of the enthalpy of mixing. The experimental data indicate that the heat of mixing in this ternary system is temperature dependent, at least in the measured temperature range.