Zr_(55)Al_(10)Ni_5Cu_(30)大块金属玻璃的晶化行为研究  

Study on crystallization behaviors of Zr_(55)Al_(10)Ni_5Cu_(30) bulk metallic glass

作　　者：王建青[1] 梁红梅[1] 宗海涛[1] 梁顺星[1] 

机构地区：[1]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：《燕山大学学报》2008年第4期326-329,共4页Journal of Yanshan University

基　　金：国家重点基础研究发展计划资助项目(2006CB605201)

摘　　要：分别在603K、653K、683K、723K、753K、793K和0.5h、1h、2h、3h、5h的保温时间下对Zr55Al10Ni5Cu30大块金属玻璃进行了退火热处理。采用X射线衍射(XRD)法分析了退火后Zr55Al10Ni5Cu30大块金属玻璃的弛豫和晶化相析出的过程,计算了不同温度下结晶度和纳米晶粒尺寸的大小。通过差示扫描量热(DSC)法分析了Zr55Al10Ni5Cu30大块金属玻璃的热稳定性。Kissinger曲线分析表明,Zr55Al10Ni5Cu30大块金属玻璃弛豫后晶化激活能高于其淬态的晶化激活能,退火温度对大块金属玻璃热稳定性有显著影响。The Zr55Al10Ni5Cu30 bulk metallic glasses （BMGs） are annealed at 603 K, 653 K, 683 K, 723 K, 753 K and 793 K for 0.5 h, 1 h, 2 h, 3 h and 5 h respectively. The precipitated phases of Zr55Al10Ni5Cu30 BMGs annealed at different temperatures are investigated by X-ray diffraction （XRD）, and the crystallinity and the grain sizes are calculated. The thermal stabilities of Zr55Al10Ni5Cu30 BMGs are investigated by means of differential scanning calorimetry （DSC） under nonisothermal conditions. Kissinger plots show that the effective activation energies for the crystallization of Zr55Al10Ni5Cu30 BMGs after relaxation are higher than that of as-quenched BMG, anneal temperature has an significant effect on thermal stability of Zr55Al10Ni5Cu30 BMGs.

关 键 词：大块金属玻璃 晶化 热稳定性 

分 类 号：TG146.4[一般工业技术—材料科学与工程]