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目前,大量二元系合金的活度计算模型得以广泛应用。本文以正规溶液模型,Miedema模型,MIVM,NRTL方程和Wilson方程作为研究模型,将各个模型所需参数进行统计,结果表明:NRTL方程和正规溶液模型所需参数最少,Miedema模型和MIVM所需参数较多,Wilson方程所需参数介于上述模型之间。通过计算Bi-Pb、Bi-Sn、Cd-Pb和Pb-Sn四个二元体系在全成分下的活度及相应活度的平均偏差S,得出:预测效果最好的是NRTL方程;Miedema模型的预测效果较差,其他模型的预测效果介于NRTL方程和Miedema模型之间。
At present, a large number of binary alloy activity calculation model can be widely used. In this paper, the normal solution model, Miedema model, MIVM, NRTL equation and Wilson equation as the research model, the parameters required for each model statistics, the results show that: NRTL equations and formal solution model required minimum parameters, Miedema model and MIVM required parameters More, the Wilson equation requires the parameters between the above models. By calculating the activity and the average deviation S of the four binary systems of Bi-Pb, Bi-Sn, Cd-Pb and Pb-Sn under the whole composition, it is concluded that the NRTL equation is the best prediction effect; The prediction of Miedema model is poor, and the prediction of other models is between NRTL equation and Miedema model.