Abstract
The electrical resistivity of liquid Bi–Ga alloys has been measured in both heating and cooling process using the four‐probe method. Anomalous behaviours of resistivity with temperature appear in heating process and are irreversible in subsequent cooling process. Microheterogeneity is then proved to exist in the melt during heating and depicted by the emulsion model. The evolution of heterogeneity in liquid Bi33·3Ga66·7 alloy was investigated through both isothermal and non‐isothermal experiments. The results indicate that Bi33·3Ga66·7 melt experiences a polydisperse–monodisperse–homogeneous state transformation upon successive heating above critical temperature.
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