Viscous and structural behaviors of molten In-Sn alloys

The liquid behavior of molten In, Sn and In-20 wt.% Sn were investigated using viscometry and differential scanning calorimetry (DSC). Normally, viscosity exponentially decreases with increasing temperature. Anomalous transition points however, were observed in our measurements of viscosity in the In-Sn system space. DSC measurements of a In-20 wt.% Sn alloy revealed peaks corresponding to the anomalous transition points on the viscosity-temperature curves. Viscous activation energy, the flow units of these melts and their structural features were analyzed in this paper.