THE METASTABLE MISCIBILITY GAP IN THE SYSTEM FE-CU

The metastable miscibility gap of Fe-Cu alloys in the undercooled liqu id state was experimentally studied using a high temperature thermoana lytical method. Applying the melt fluxing technique it was possible to reach undercooling levels up to 250 K. Thus, the miscibility gap coul d be determined in the wide composition range between 10 at.% and 88 a t.% Fe, showing symmetrical shape. Additionally, the specific heat in the liquid and undercooled liquid state was measured. A strong tempera ture dependence of the liquid specific heat was observed, which can be described in the framework of the self-association model.