Thermodynamic description of the Cu–Ni–Sn system at the Cu–Ni side

Thermodynamic description of the ternary Cu–Ni–Sn system at its Cu–Ni side is presented. The thermodynamic parameters of the binary sub-systems, Cu–Ni, Cu–Sn and Ni–Sn, are taken from earlier SGTE-based assessments (modifying the Ni–Sn description slightly) and those of the ternary Cu–Ni–Sn system are optimized in this study by using the experimental data of mixing enthalpy and phase equilibrium. The present ternary description is valid for tin contents up to 38 wt% (xSn≈0.25). In addition, a new description is presented for the earlier assessed Cu–P–Sn system, due to the new Cu–Sn description adopted after its appearance (and shown in the present study).