依据规则溶液模型,在充分利用 Cu-Al 系相图的基础上,导得 Cu-Al 合金的一些热力学参量。应用统计模型处理了 Cu-Al 合金中涉及马氏体相变的体心立方及面心立方两种结构的有序相变,直接从理论上计算了不同成分 Cu-Al 合金α和β相的平衡温度 T~*,有序α′与β′相的平衡温度 T_0,以及马氏体相变点 M_s,其中 M_s 与实验值非常吻合。计算还表明 Cu-Al 系中 T_0比 T_0~*更高。 Based on the rule solution model, some thermodynamic parameters of Cu-Al alloy were obtained by making full use of the Cu-Al phase diagram. The ordered phase transformations of both body-centered cubic and face-centered cubic structures of martensitic transformations in Cu-Al alloys were dealt with statistical models. The α and β phases of Cu-Al alloys with different compositions were directly calculated The equilibrium temperature T ~ *, the equilibrium temperature T_0 of the ordered α ’and β’ phases, and the martensitic transformation point M_s, where M_s is in good agreement with the experimental value. Calculations also show that T_0 in Cu-Al system is higher than T_0 ~ *.