Viscosity of the InBi-Pb Melts

The temperature dependences of the dynamic viscosity of the InBi100 -xPbx (where x = 19, 40, 60, 80, and 100 at %) melts are studied in the range from the liquidus temperature to 1200 K by the oscillating crucible method. The temperature dependences of the viscosities of melts of these compositions are well described by the Arrhenius equation. The viscosity of the InBi-Pb melts at a constant temperature has small negative deviations from the ideal mixture viscosity. The activation energy of a viscous flow has negative deviations from additive values with a minimum near 20 at % Pb. The concentration dependences of the viscosities of the melts are calculated using the well-known equations based on the thermodynamic properties. The obtained results are compared with the experimental data.

Automated summary

In this study, the temperature dependence of dynamic viscosity in InBi-Pb melts was investigated, showing small negative deviations from ideal mixture viscosity at constant temperature. The activation energy for viscous flow also exhibited negative deviations from additive values, with a minimum near 20% Pb. The concentration dependence of viscosity in the melts was calculated and compared with experimental data.