The thermodynamics of Pd-Au-H ternary solid solutions

Abstract

The solubility of hydrogen in PdAuH ternary solutions in equilibrium with H gas at atmospheric pressure has been measured in the temperature range 625–1250 K and in Pd-Au “binary solvents” containing up to 80 At % of Au Concomitant elastic measurements have provided data which enable the partial thermodynamic functions of the H atoms deduced from the solubility measurements to be converted so as to refer to a hypothetical Pd-Au lattice of constant specific volume The resulting “volume corrected” functions have been discussed in terms of the cell model for ternary solutions and have been shown to vary with temperature and Au concentration in a manner in accord with this model.