摘要
研究了Zr56.6Cu17.3Ni12.5Al9.6Ti4(at.%)块体非晶合金连续升温过程中的晶化行为。结果表明,随着升温速度的增加,特征温度Tg,Tx,Tp1,Tp2均向高温区移动,特征温度与升温速度的关系可以用一次指数衰减关系拟合。采用Kissinger法和Ozawa法分别计算了特征温度对应的激活能Eg,Ex,Ep1,Ep2。由于不同升温速度下特征温度对应的晶化体积分数几乎不变,因而,采用Kissinger法计算结果与Ozawa法的计算结果呈现一致性。Eg,Ex,Ep1,Ep2之间的大小关系为:Eg≈Ep1≈Ep2<Ex。
The crystallization behaviors of Zr56.6Cu17.3Ni12.5Al9.6Ti4 （at %） bulk amorphous alloy during continuous heating are investigated mainly by differential scanning calorimeter （DSC）. The results show that with increasing of heating rates, all the characteristic temperatures including glass transition temperature Ts, onset crystallization temperature Tx and peak crystallization temperatures Tp1 and Tp2 shift to higher temperatures while the relationship between the characteristic temperatures and the heating rates obeys the first order exponential decay relation. The activation energies Eg, Ex, and Ep, corresponding to characteristic temperatures Tg, Tx, and Tp, respectively, were obtained from the Kissinger and Ozawa equations. The calculated activation energies show good agreement by the Kissinger or Ozawa equations due to the almost invariability of the crystallization volume fraction at the characteristic temperatures for different heating rates. The values orEg, Ex, Ep1, and Ep2 fellow the sequence of Eg≈Ep1≈Ep2〈Ex.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第7期1181-1184,共4页
Rare Metal Materials and Engineering
关键词
块体非晶合金
晶化行为
激活能
bulk amorphous alloy
crystallization behavior
activation energy
