锆基大块非晶合金的非等温晶化动力学效应  

Kinetic Effects of Nonisothermal Crystallization of Zr-based Bulk Amorphous Alloy

作　　者：汪波[1] 何顺荣[1] 吴志强[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《稀有金属与硬质合金》2009年第2期17-21,共5页Rare Metals and Cemented Carbides

摘　　要：采用非等温差示扫描量热法(DSC)研究了锆基非晶合金Zr60Al15Ni25、Zr65Al10Ni10Cu15的晶化动力学。结果显示,随着升温速率的加快,这两种非晶合金的特征温度Tg、Tx、Tp均向高温区移动,且过冷液相区逐渐加宽,表明非晶合金的玻璃化转变和晶化均具有动力学效应。分别采用Kissinger法和Ozawa法计算各非晶合金的激活能,两种方法的计算结果相近。从激活能数据得出,两种锆基非晶合金的热稳定性均较强;与非晶合金Zr60Al15Ni25相比,Zr65Al10Ni10Cu15虽较难形成玻璃化转变和开始晶化,但其晶化一旦开始则随后的过程反而更容易进行。The crystallization kinetics of the Zr based was investigated by differential scanning calorimetry amorphous alloys （Zr60 Al15 Ni25 and Zr65 Al10 Ni10 Cu15 ） （DSC） under nonisothermal conditions. The results show that the characteristic temperatures （Tg, Tx and Tp） of Zr60 Al15 Ni25 and Zr65 Al10 Ni10 Cu15- shift to higher ones with the increase of heating rate,and the supercooled liquid region is widened. Therefore, both the glass transition-and crystallization of Zr60Al15Ni25-and Zr65 Al10 Ni10Cu15-have kinetic effects. The activation energy of the two amorphous alloys was evaluated using Kissinger and Ozawa equations, and the resuls from the different equations are nearly equal. It can be seen from the data of activation energy,the thermal stability of the two alloys is high,and the glass transition-and initial crystallization of Zr65 Al10 Ni10Cu15-are more difficult than-those of Zr60 Al15 Ni25. However,once the crystallization starts, Zr65 Al10 Ni10Cu15-is more easier to crystallize.

关 键 词：锆基非晶合金 非等温晶化 玻璃化转变 动力学效应 激活能 DSC 

分 类 号：TG139.8[一般工业技术—材料科学与工程]