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采用差式扫描量热方法进行热分析实验,研究不同加热速率下非晶合金条带Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9的晶化动力学特性。DSC曲线的晶化温度和晶化峰值温度随着加热速率的增高而向高温方向迁移,说明合金的晶化过程表现出明显的动力学特性。建立基辛格模型,拟合动力学模型函数对结晶率的实验曲线,可以获得动力学参数值,得出晶化激活能的数值为2.89 e V。研究表明:对于Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9合金,采用经验的双参数Sestak-Berggre模型能更加定量描述其晶化过程,而Johnson-Mehl-Avrami模型适宜在较低加热速率下描述。
Differential scanning calorimetry was used to conduct thermal analysis experiments to study the crystallization kinetics of amorphous Fe_ (73.5) Cu_1Nb_3Si_ (13.5) B_9 under different heating rates. The crystallization temperature and crystallization peak temperature of the DSC curve migrate toward high temperature with the increase of the heating rate, indicating that the crystallization process of the alloy shows obvious kinetic characteristics. The Kissinger model was established, and the experimental curve of the kinetic model function to the crystallization rate was fitted to get the kinetic parameter value, and the value of the crystallization activation energy was 2.89 eV. The results show that the crystallization process can be more quantitatively described by the empirical two-parameter Sestak-Berggre model for the Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 alloy, while the Johnson-Mehl-Avrami model is suitable for the low heating rate.