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利用示差扫描量热仪(DSC)研究了Zr47Cu44Al9大块非晶合金在连续升温过程中的的变温晶化行为。利用Kissinger方法计算其特征温度表观激活能,利用Doyle方法计算其局域激活能。结果表明,Zr47Cu44Al9大块非晶合金具有良好的热稳定性。利用Kissinger方法计算得到的其玻璃转变激活能Eg为390.2kJ/mol、晶化激活能Ex为325.1kJ/mol、晶化峰值的激活能Ep为299.5kJ/mol。随着加热速率的提高,各特征温度值向高温端移动,其晶化峰值温度所对应的晶化体积分数减小。局域激活能随着非晶晶化体积分数的增加而逐渐减小。
The temperature-programmed crystallization behavior of Zr47Cu44Al9 bulk amorphous alloy during continuous heating was investigated by differential scanning calorimetry (DSC). Kissinger method was used to calculate the apparent activation energy of its characteristic temperature, and the Doyle method was used to calculate its local activation energy. The results show that, Zr47Cu44Al9 bulk amorphous alloy has good thermal stability. The glass transition activation energy Eg calculated by Kissinger method is 390.2 kJ / mol, the crystallization activation energy Ex is 325.1 kJ / mol and the activation energy Ep of the crystallization peak is 299.5 kJ / mol. With the increase of the heating rate, each characteristic temperature moves toward the high temperature, and the crystallization volume fraction corresponding to the crystallization peak temperature decreases. The local activation energy decreases with the increase of amorphous crystallization volume fraction.