研究了 Zr-Al-Ni-Cu大块非晶合金在连续升温过程中的晶化行为.结果表明,随升温速度的加快,特征温度 Tg, Tx, Tp均向高温区移动,晶化热焓增加,过冷温度区间扩大,并且峰值温度 Tp对应的晶化体积分数减少.利用 Kissinger曲线和 Doyle曲线法计算合金的变温晶化激活能 E,结果表明,晶化激活能随晶化过程的进行,其值先增加后降低,并且在晶化即将结束时,晶化激活能急剧降低.采用 Kissinger曲线计算晶化激活能,由于特征温度在不同的加热速度下对应的晶化体积分数发生变化,从而导致了激活能计算值的偏大.
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