Zr-Al-Ni-Cu合金非晶形成范围的Miedema模型预测

Prediction of Amorphous-forming Composition Range for Zr-Al-Ni-Cu Alloys Based on Miedema's Model

运用扩展Miedema模型及Toop几何模型,计算了Zr-Al-Ni-Cu四元系中各三元合金及四元合金的形成焓与系统组成间的分布关系.利用对应三元合金焓值的加权计算,获得了Zr-Al-Ni-Cu四元合金的最佳非晶形成组分.与现有实验结果相对比,计算结果及机械合金化实验均表明,利用合金的形成焓值可以较好地预测系统的非晶形成范围.

By extending Miedema's model and Toop geometric model used to calculate the formation enthalpy with compositions of Zr-Al-Ni-Cu quarternary alloy system and its corresponding four ternary alloy systems.The amorphous forming compositions range(AFCR)of Zr-Al-Ni-Cu alloy system was obtained from formation enthalpies of corresponding four ternary alloy systems by means of weighted calculation.Compared with the existing experimental results,the calculation results and the mechanical alloying experiments show that AFCR of Zr-Al-Cu alloy system can be predicted well by using the formation enthalpy of the alloy.