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用基于热力学观点的定量预测三元合金形成非晶成分范围的方法,对Cu-Zr-Ti三元合金系形成非晶的成分范围进行了计算。该方法通过比较晶态固溶体的自由能和相应的非晶态的自由能来确定非晶形成的成份范围,在自由能的计算中,三元系的热力学数据用相应的3个二元系的热力学数据由Toop模型外推得到,二元合金系的形成焓则通过Miedema理论的计算得出。结果表明,理论预测的形成非晶的成分范围与已有的实验结果符合得比较好。
The range of amorphous composition of the Cu-Zr-Ti ternary alloy was calculated by the method of quantitatively predicting the amorphous component range of the ternary alloy based on the thermodynamic viewpoints. The method determines the compositional range of amorphous composition by comparing the free energy of the crystalline solid solution and the corresponding free energy of the amorphous state. In the calculation of free energy, the thermodynamic data of the ternary system are represented by the corresponding three binary systems The thermodynamic data are extrapolated from the Toop model, and the formation enthalpy of the binary alloy system is calculated by the Miedema theory. The results show that the predicted range of composition of amorphous material is in good agreement with the existing experimental results.