The Absolute Viscosity of Some Lead-Tin Alloys

Abstract

Abstract The absolute viscosity of lead, tin and nine of their alloys were measured as a function of temperature between the liquidus and 500°C by an oscillating cup viscometer. The viscosity of pure tin ranged from 0.01780 poise at 235°C to 0.01196 poise at 458°C. The viscosity of pure lead ranged from 0.02578 poise at 334°C to 0.01896 poise at 472°C. Viscosity isotherms, as a function of composition, showed an ideal linear behavior with no anomaly detected at the eutectic composition (26.1 at % Pb). A plot of log φ versus 1/T was linear for all samples. Accuracy of the data is estimated to be about 1%.