Abstract
Abstract The constitution of both Cu-Fe and Cu-Co alloys in the liquid state was studied by the following two methods: the measurement of magnetic susceptibility at high temperatures, and the microscopic examination of quenched specimens. Since the liquid alloys were supercooled 100°C or more, the investigation could be extended to the metastable region below the liquidus curves. In both systems, the liquid immiscibility has been found only in the supercooled state. The immiscibility gap is nearly symmetrical about the axis corresponding to the equi-atomic composition. The temperatures of critical mixing for the Cu-Fe and Cu-Co systems are respectively 20° and 90°C below the liquidus curves at the equi-atomic composition. The results are related to the activities for the liquid solution on the basis of thermodynamics.
Published Version
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