合金熔体活度测定及其预测模型

Activities Evaluation and Prediction Model in Alloy Molten

活度是研究熔体热力学的内容之一,活度数据可以通过化学平衡法、蒸汽压力法和电化学法等实验方法间接得到;也可以通过建立的热力学模型如:正规溶液模型、拟化学模型、共存理论模型、中心原子模型、Miedema生成热模型等理论方法求得。

The main task in alloy thermodynamics is the determination of the activity of alloy constituents. The activities of an alloy system can be determined by measuring the partial vapor pressures, by means of electrochemical measurement, or by determining chemical equilibria. Activity can also be calculated on the basis of prediction model such as regular solution model, subregular solution model, free volume model, central atomic model, coexistence theory model, and Miedema model.