Thermodynamic description of Cu---Sn---P system in the copper-rich corner

Thermodynamic optimisation is made to describe the properties of the ternary Cu---Sn---P system in the copper-rich corner. The thermodynamic parameters of the sub-system Cu---Sn are taken from a recent assessment and the parameters of the sub-systems Cu---P and Sn---P, and the ternary Cu---Sn---P system are optimised in this study by using experimental data of component activity and phase equilibria. The present ternary description is valid for tin contents up to xsn=0.20 (≈32wt%Sn) and phosphorus contents up to xp=0.25 (≈14wt%P).