A pseudopotential approach to the viscosity of liquid Cu-based alloys

A pseudopotential method was applied to calculate the composition dependence of the viscosity in liquid alloys of Cu-Al, Cu-Sn, Cu-Sb, Cu-Pb and Cu-Bi. A new approach is introduced to solve the problem of integration over diverging integrands. In accordance with the experimental findings, the deviations of the viscosities from the additive law were found to be negative for all systems under investigation. A semi-empirical consideration based on fundamental physical quantities combined with the enthalpy of mixing as measure of the interactions between the constituent atoms was included in the discussion.