STUDY ON PHASE EQUILIBRIUM BETWEEN THE ORDER PHASE AND DISORDER PHASE FOR Cu-Au ALLOY

Ⅰ. THE CALCULATION MODEL OF GIBBS FREE ENERGY From Ref. [1], the expression of Gibbs free energy for disorder phase is: G^r=sum (X_iG_i^r)+ΔH^r-TΔS^r, (1) where for the physical meaningsof the quantities see Ref. [1], the superscript 'r' represents disorder phase.