介绍用特征晶体模型描述合金热力学的基本原理和方法. 对Ta-W相图进行了优化和计算, 选择描述有序和无序Ta-W合金相吉布斯自由能表达式, 并确定其中的参数. 计算的相图与前人的计算的一致. 讨论有序Ta-W合金的热力学, 并说明无序Ta-W固溶体比有序的金属间化合物更稳定.
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