Zr_(41)Ti_(14)Cu_(12.5)Ni_(10)Be_(22.5)块状非晶合金的相变动力学  

Transformation Kinetics of Bulk Zr_(41)Ti_(14)Cu_(12.5)Ni_(10)Be_(22.5) Metallic Glass

作　　者：张克勤[1] 王艳[1] 吴思育[2] 关颖[1] 张湘义[1] 

机构地区：[1]燕山大学材料工程学院,河北秦皇岛066004 [2]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《钢铁研究学报》2002年第6期65-68,共4页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(19974035);河北省自然科学基金资助项目(599240)

摘　　要：用差式扫描热分析和X射线衍射方法,研究了Zr41Ti14Cu12.5Ni10Be22.5块状非晶合金的相变动力学。结果表明:在温度低于500℃的范围内,Zr41Ti14Cu12.5Ni10Be22.5块状非晶合金中的晶化相可大体分为α相和β相(主要为Ti2Ni和Zr2Cu等)。在晶化初期α相的激活能较小,为159kJ mol,它随着晶化分数X的增加而提高,在X为90%时达到最大值220kJ mol;β相的晶化激活能在X为5%～60%的范围内变化不大,然后随晶化分数X的增加而提高,X为65%时达到最大值257.35kJ mol。The transformation kinetics of bulk Zr41Ti14Cu12.5Ni10Be22.5 metallic glass has been studied by DSC and XRD. The results showed that the two exothermal peaks are observed as the alloy is heated to 500 ℃, one results dominantly from the formation of Ti2Ni (phase α), another from the formation of Zr2Cu (phase β). At the beginning of crystallization, the activation energy of phase α is small (159 kJ/mol), and it increases with the increase of crystallized fraction (X). When X increases to 90 %, the crystallization activation energy reaches the largest value (220 kJ/mol). The crystallization activation energy of the phase β remains about 227 kJ/mol, until the crystallized fraction (X) reaches 60 %, and then increases with the increase of crystallized fraction (X), and reaches the largest value of 257 kJ/mol, as the X is 65 %.

关 键 词：非晶合金 ZrTiCuNiBe合金 相变动力学 晶化 激活能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]