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采用Kissinger、Ozawa和MKN法研究Fe/Co比例变化对(FexCo1-x)72B19.2Si4.8Nb4系大块非晶合金晶化行为的影响。结果表明,当x在0.3～0.7之间变化时,所制备的直径为2mm的(FexCo1-x)72B19.2Si4.8Nb4系合金棒为完全非晶结构;玻璃转变温度Tg、晶化温度Tx及晶化峰值温度Tp随加热速率的增大均向高温区移动;用Kissinger法、Ozawa法和MKN法测定的非晶合金激活能结果非常接近,其中Kissinger法和MKN法测得的结果稍大,且都呈现出Ex>Ep>Eg的规律性;随着Fe含量的增加,晶化激活能Ex先增大后减小,而阶段晶化激活能Eo最大值呈下降趋势。
Kissinger, Ozawa and MKN methods were used to study the effect of Fe / Co ratio on crystallization behavior of (FexCo1-x) 72B19.2Si4.8Nb4 bulk amorphous alloy. The results show that the (FexCo1-x) 72B19.2Si4.8Nb4 alloy rods with a diameter of 2mm are completely amorphous when x varies from 0.3 to 0.7. The glass transition temperature Tg, crystallization temperature Tx and The peak temperature of crystallization (Tp) shifts to high temperature with the increase of heating rate. The activation energy of amorphous alloys measured by Kissinger method, Ozawa method and MKN method are very close. The results obtained by Kissinger method and MKN method are slightly larger, And showed the regularity of Ex> Ep> Eg. With the increase of Fe content, the activation energy of crystallization Ex first increased and then decreased, while the maximum of the crystallization activation energy Eo showed a downward trend.