Zr_(47)Cu_(44)Al_9大块非晶合金的变温晶化行为  

Crystallization kinetics of Zr_(47)Cu_(44)Al_9 bulk metallic glass

作　　者：张宝庆[1,2] 曹国华[3] 战再吉[2] 刘日平[2] 王文魁[2] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 [3]河南理工大学物理化学学院,河南焦作454000

出　　处：《材料热处理学报》2009年第6期1-4,共4页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(10702060);国家重点基础研究发展计划基金(2006CB605201)

摘　　要：利用示差扫描量热仪(DSC)研究了Zr47Cu44Al9大块非晶合金在连续升温过程中的的变温晶化行为。利用Kissinger方法计算其特征温度表观激活能,利用Doyle方法计算其局域激活能。结果表明,Zr47Cu44Al9大块非晶合金具有良好的热稳定性。利用Kissinger方法计算得到的其玻璃转变激活能Eg为390.2kJ/mol、晶化激活能Ex为325.1kJ/mol、晶化峰值的激活能Ep为299.5kJ/mol。随着加热速率的提高,各特征温度值向高温端移动,其晶化峰值温度所对应的晶化体积分数减小。局域激活能随着非晶晶化体积分数的增加而逐渐减小。Zr47Cu44Al9 bulk metallic glass was prepared by copper mold casting.The crystallization behavior of the bulk metallic glass was investigated by using differential scanning calorimetry（DSC）.The results show that the character temperatures,including glass transition temperature Tg,crystallization temperature Tx and crystallization peak temperature Tp,all move to high temperature zone with increasing of heating rate.The activation energy of glass transition,crystallization and peak crystallization are 390.2kJ/mol,325.1kJ/mol and 299.5kJ/mol,respectively.The crystallization activation energy decreases with increase of the crystallizaed volume fraction.The results show that Zr（47）Cu（44）Al9 bulk metallic glass has good thermal stability.

关 键 词：大块非晶合金 变温晶化 晶化动力学 晶化激活能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]