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Modeling and Calculation of Activities of Constituent Elements in Binary Alloys
Pages: 919-925
Year: Issue:  8
Journal: Vacuum Science and Technology

Keyword:  Binary alloyThermodynamic modelsActivityAverage deviation;
Abstract: The activities of the constituent elements in a variety of binary alloys were calculated with the widely used thermodynamic models,including but not limited to the regular solution model,Miedema model,molecular interaction volume model( MIVM),non-random two-liquid( NRTL) equation and Wilson equation. The numbers of major parameters involved in each model were found to be in a descending order: Miedema model and MIVM > Wilson equation > NRTL equation and the regular solution model. The activities and average deviations of the alloys were calculated,such as the Bi-Pb,Bi-Sn,Cd-Pb and Pb-Sn alloys. The calculated results show that when it comes to prediction precision,NRTL equation does the best job and Miedema model does the worst.
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