Abstract
The enthalpies of solution of solid nickel in liquid gold at 1110°C in the concentration range between 0 and 42.2 at. % nickel were determined with the aid of a high temperature calorimeter. The enthalpies of solution of gold—nickel solid solutions of the entire concentration range in liquid copper were determined in like manner. From the experimental results the enthalpies of mixing of the liquid and solid gold—nickel solutions could be obtained. An evaluation of the melting equilibria provided the excess entropies and the free enthalpies of mixing of the liquid alloys. Besides the change of the interatomic attraction on alloy formation, the marked difference in atomic radii of the components in the gold—nickel system is of considerable influence on the thermodynamic properties of both the solid and the liquid alloys. This is shown in a discussion.
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