A Direct Correlation between Viscosity and Liquid Structure in Cu-Sn Alloys

Abstract EN

The viscosity and liquid structure of Cu100-xSnx (x=10, 20, 30, 40, at.%) melts were investigated.

Temperature dependence of viscosity η and correlation length D all shows an exponential decay function (Arrhenius-type equation), which is similar to our former studied Cu-Ag alloys.

The correlation between viscosity and liquid structure had been studied.

A simple relation between viscosity and correlation length D was found.

The ratio of D and η shows a linear relationship with temperature, which is different from our former studied results in Cu-Ag alloys.

Among the four Cu-Sn alloys, Cu80Sn20 and Cu70Sn30 alloys have higher activation energy for viscous flow (Ea,V), activation energy for structural evolution (Ea,D), and the slope (γ) of the linear relationship of D/η with temperature due to the Cu3Sn clusters formation.