Abstract
The electrical resistivity of Co-Cu alloys with Cu content of 10, 20, 30, 40, 50, 60, 70, 80, and 90 at.% was measured in the temperature range from 1400 to 2100K. The experiments were performed during of heating and subsequent cooling of the samples. For alloys with Cu content of 30, 40, 60, 70, 80, and 90 at.%, a bend in the cooling curve specific to the liquid-liquid phase separation (LLPS) process was observed. LLPS is shown when the melt is undercooled to the binodal temperature T∗. The phase transition model of LLPS was proposed for to theoretically determine the temperatures T∗. The LLPS model demonstrates the possibility of percolation phenomena occurring in Cu-Co heterogeneous melts rich in cobalt. The LLPS model shows good agreement with experimental data and the abnormal resistivity behavior of Co–Cu alloys.
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