Enthalpies of liquid-liquid mixing in the systems Cu-Ag, Cu-Au and Ag-Au by using an in-situ mixing device in a high temperature single-unit differential calorimeter

摘要

The enthalpies of mixing of the binary liquid alloysof copper with silver, copper with gold and silver with gold havebeen re-determined using a new in-situ mixing technique at1375±2 K. We note that in all of these systems the enthalpyinteraction parameter is described by a nonlinear relation to thecomposition. These new results are compared with earlier data ofKleppa and Watanabe [O.J. Kleppa, S. Watanabe, Met. Trans. 13B(1982) 391-401] and of Topor and Kleppa [L. Topor, 0.1. Kleppa,Met. Trans. 15A (1984) 203-208], obtained by dropping one of thetwo components into the high-temperature calorimeter from room temperature.