Geometric modelling of viscosity of copper-containing liquid alloys

In this work, viscosities of ternary Au–Ag–Cu and Al–Cu–Si liquid alloys have been calculated as a function of gold, aluminium and copper compositions for the sections Au–Ag–Cu (x_Ag/x_Cu = 0.543 at 1373 K), Al_x(Cu₅₀–Si₅₀)_(1–x) and Cu_x(Al₅₀–Si₅₀)_(1–x) at 1375 K using Chou’s general solution model, Muggianu, Kohler, Toop, Hillert, Budai et al., Kozlov et al., Schick et al. and Kaptay et al. models. The present study finds that a comparison of the predicted values of viscosities associated with the geometric and physical models indicate good mutual agreement. The Muggianu model indicates the best agreement with the results obtained for Au–Ag–Cu and Al_x–Cu₅₀–Si₅₀ alloy systems and the Kaptay et al. model, which is a physical model, indicates the best agreement with the results obtained for Al₅₀–Cu_x–Si₅₀.