ZrCuAlSi大块非晶合金变温晶化行为  

Crystallization Behavior of ZrCuAlSi Bulk Metallic Glass in Continuous Heating

作　　者：张宝庆[1,2] 曹国华[1] 刘宝忠[1] 袁庆龙[1] 李力新[1] 张志[1] 王文魁[2] 

机构地区：[1]河南理工大学,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

出　　处：《稀有金属材料与工程》2011年第5期824-828,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50731005);南理工大学博士基金(B2010-81)

摘　　要：利用铜模吸铸法制备Zr46.3Cu43.3Al8.9Si1.5(at%)大块非晶合金,利用示差扫描量热(DSC)仪研究合金连续升温过程中的晶化行为,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,Zr46.3Cu43.3Al8.9Si1.5大块非晶合金具有良好的热稳定性。利用Kissinger方法计算得到其玻璃转变激活能Eg为395.4kJ/mol、晶化起始激活能Ex为343.2kJ/mol、晶化峰的激活能Ep为343.0kJ/mol。Doyle方法计算其局域激活能表明,其晶化过程中,激活能明显越过一能量势垒后,再呈现逐渐减小的趋势。Zr46.3Cu43.3Al8.9Si1.5（at%） bulk metallic glass was prepared by copper mould casting.The crystallization behavior of the alloy in continuous heating was investigated by differential canning calorimeter（DSC）.The characteristic temperature apparent activation energy and the local activation energy were calculated by the Kissinger and Doyle equations,respectively.The results show that the activation energies of glass transition（Eg）,crystallization（Ex） and peak crystallization（Ep） are 395.4 kJ/mol,343.2 kJ/mol and 343.0 kJ/mol,respectively.With the increase of the crystallized volume fraction,the crystallization activation energy increases to the largest energy barrier,and then decreases.Zr46.3Cu43.3Al8.9Si1.5 bulk metallic glass has desirable thermal stability.

关 键 词：ZrCu基大块非晶合金 热稳定性 晶化动力学 激活能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]