Abstract
To explain the so far obtained experimental results concerning the thermodynamical properties of binary alloys during fusion, the entropy of fusion of binary alloy is investigated starting from a thermodynamical theory of phase diagram(1). Especially, the effects of mixing of vacancies, of the short-range ordering and of the change of atomic vibrations due to alloying in solid or in liquid are discussed, and compared with some experimental results. Mixing of interstitial type is argued too. Good agreement between the theory and observations is indicated and some predictions are made.
