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利用电弧炉+铜模吸铸的方法制备了Zr46.3Cu43.4Al8.3Nb2(at%)块体非晶合金。利用示差扫描量热仪(DSC)研究了合金的热稳定性,利用Kissinger方法计算了其特征温度表观激活能,利用Doyle方法计算了其局域激活能。结果表明,Zr46.3Cu43.4Al8.3Nb2块体非晶合金具有良好的热稳定性。各特征温度的表观激活能分别为:玻璃转变激活能(Eg)为302.7 kJ/mol、晶化起始激活能(Ex)为445.853 kJ/mol、晶化峰值激活能(Ep)为389.20 kJ/mol。局域激活能随着晶化体积分数的增加而显著减小。
Zr46.3Cu43.4Al8.3Nb2 (at%) bulk amorphous alloy was prepared by arc casting and copper mold suction casting. The thermal stability of the alloy was studied by differential scanning calorimetry (DSC). Kissinger method was used to calculate the apparent activation energy of the alloy. The Doyle method was used to calculate the local activation energy. The results show that Zr46.3Cu43.4Al8.3Nb2 bulk amorphous alloy has good thermal stability. The apparent activation energies of each characteristic temperature were: glass transition activation energy (Eg) of 302.7 kJ / mol, crystallization activation energy (Ex) of 445.853 kJ / mol and crystallization peak activation energy (Ep) of 389.20 kJ / mol. Local activation can decrease significantly with the increase of crystallization volume fraction.