Microsegregation in liquid Pb-based eutectics

Temperature dependence of electrical conductivity, σ(T), thermoelectric power, S(T), and viscosity, η(T), of Pb-based eutectic systems was studied. Anomalous changes of thermophysical properties in liquid binary Pb26.1Sn73.9, Pb44Bi56, Pb83Mg17 and ternary Bi46Pb29Sn25 eutectics occurred well above the liquidus. The temperature range of anomalies reached hundreds of degrees. The obtained results are interpreted assuming that microsegregation areas exist in the eutectic systems.