Activity interaction coefficients for solutes in alloy melts can be predicted by combining Mi-edema model with extrapolation models.However,the treatment of the binary interaction terms in tradi-tional extrapolation models lacks a clear physical mechanism,which reduces the prediction reliability of models based on traditional extrapolation.The unified extrapolation model(UEM)can mathematically cover all traditional extrapolation models by introducing the contribution coefficient determined by proper-ty difference between two elements.In this study,a new model for activity interaction coefficients was built by using UEM to couple with the Miedema model and Tanaka excess entropy relation.The new mod-el can explain the prediction characteristics and application scope of models based on traditional extrapo-lation in terms of the relation between the contribution coefficient and the property difference.The ob-tained results favorably agree with the experimental results.
关键词
活度相互作用系数/合金溶液/Miedema模型/外推模型
Key words
activity interaction coefficient/alloy solution/Miedema model/extrapolation model
维普
万方数据