THE ELECTRICAL RESISTIVITY OF LIQUID Pb-Bi ALLOY

Different from the conventional liquid theory, experimental evidence suggests that there might be discontinuous liquid-liquid (L-L) structure transitions for some alloys. By the resistivity experiments, it is assumed that a temperature-induced L-L structure transition might occur in liquid lead-bismuth ( PbBi ) alloy. The electrical resistivity of four compositions for PbBi alloy versus temperature was precisely measured in our experiment. It was found that the resistivity increases linearly with temperature rising in a certain range of temperature above the melting point. During subsequent calefaction, the results obviously showed that a turning point appears in the resistivity-temperature (R-T) curve for every composition at a certain temperature. The turning temperature depends on composition. It can be considered that there is L-L structure transition in some regions of high temperature for PbBi alloy.