Heat content and heat capacity of Cu0.7In0.3 from 298 K to 1273 K

The homogeneity range of the delta phase of the Cu-In system extends from 2 8.9 at.% In to 30.6 at.% In. It presents a crystallographic phase transitio n Fly at the temperature of 905 K. The gamma phase thigh temperature) melts congruently at a temperature of 955.5 K for a composition of 29.6 at.%. In this work, the results of drop colorimetry measurements are presented for the heat content between 298 K and 1273 K. From these experimental results, the Delta(298)(T)H = f(T) functions are deduced for the three phases of co mposition Cu0.7In0.3 as well as the heat capacities. The excess heat capaci ty of the liquid is determined. Temperatures and enthalpies of the transiti on delta/gamma and fusion of gamma/liquid are measured and compared with va lues obtained by differential scanning calorimetry (DSC 121 Setaram).