Study of surface tension and viscosity of Cu-Fe-Si ternary alloy using a thermodynamic approach

The surface tension and viscosity of Cu-Fe-Si ternary alloys were computed at different temperatures using thermodynamic approaches. The thermodynamic data of the alloy were optimized in the framework of the Redlich-Kister (R-K) polynomials and exponential temperature dependent coefficients of the R-K polynomial were obtained. These coefficients were used to compute the excess Gibbs free energy of mixing of the alloy and the partial excess free energy of the components. The partial excess free energy so obtained was used to compute the surface tension of the ternary Cu-Fe-Si alloy system and its binary sub-systems. The enthalpy of mixing was also optimized and it was used to compute the viscosity of the sub-binary and ternary alloys.