(Cu_(50)Zr_(42)Al_8)_(96)Y_4块状非晶的变温晶化行为  

Effects of Temperature on Crystallization Behavior of Bulk(Cu_(50)Zr_(42)Al_8)_(96)Y_4 Amorphous Alloy

作　　者：屠鹏[1] 寇生中[2] 

机构地区：[1]甘肃农业大学,兰州730070 [2]兰州理工大学,兰州730050

出　　处：《有色金属》2011年第2期50-53,共4页Nonferrous Metals

摘　　要：研究(Cu50Zr42Al8)96Y4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,玻璃转变温度Tg、晶化起始温度Tx、晶化峰值温度Tp都向高温区移动,过冷温度区△Tx扩大到了72.5K。运用Kissinger法分别计算出玻璃转变激活能Eg为512.34kJ/mol、晶化起始激活能Ex为372.44kJ/mol、晶化峰的激活能Ep1和Ep1为404.52kJ/mol、404.75kJ/mol。运用FWO法计算出了晶化阶段激活能Ex,发现当晶化量小于50(时,随晶化量的增大,阶段激活能变化不大;当晶化量大于50(时,随晶化量的增大,阶段激活能呈逐渐减小的趋势。Crystallization behavior of bulk（Cu50Zr42Al8）96Y4 amorphous alloy during continuous temperature increment was described.With increasing of the temperature,The results indicate that the glass transformation temperature（Tg）,crystallization initial temperature（Tx）and crystallization peak temperature（Tp） tend to high temperature zone,and under-cooled temperature zone △Tx is enlarged to 72.5K.The glass transformation activation energy Eg,crystallization initial activation energy Ex and crystallization peak activation energy Ep are calculated by the Kissinger formula which is 512.34 kJ/mol,372.44 kJ/mol,404.52 kJ/mol and 404.75 kJ/mol respectively.In addition,crystallization phase activation energy Ex is calculated by the FWO equation.The research found that there is no notable change in the crystallization phase activation energy is increased with the increasing of crystallization degree when crystallization degree is lower than 50%;on the contrary,when crystallization degree is higher than 50%,the crystallization phase activation energy is decreased with the increasing of crystallization degree.

关 键 词：Cu基非晶 Y元素 激活能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]