Thermodynamic description of the Cu-Ni-Si system in the copper-rich corner above 700 ∘C

A thermodynamic description is presented for the ternary Cu-Ni-Si system in its copper-rich corner. The thermodynamic parameters of the binary sub-systems, Cu-Ni and Cu-Si, are taken from the earlier SGTE-based assessments, and those of the Ni-Si and Cu-Ni-Si systems are optimized in this study using the experimental phase equilibrium and thermodynamic data. The present ternary description is valid for nickel contents up to 40 wt%, for silicon contents up to 8 wt%, and at temperatures above 700 ∘C.