将Al-Cu熔体中的缔合物AlCu3以短程序的形式引入置换溶液模型中,提出了一个Redlich-Kister多项式表示的缔合溶液模型,可以直接用于Thermo-Calc相图计算软件,并用这个模型改进了Al-Cu合金体系中液相的热力学描述,计算了Al-Cu熔体混合焓、固相线和平衡分凝因数.结果表明,本模型比目前广泛应用的Saunders模型能给出更好的结果,而且适用于Mg-Sn和In-Sb等二元合金体系液相的热力学描述.
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