Al对Cu基块体非晶形成能力及热稳定性的影响  

Effects of Al on Glass-Forming Ability and Thermal Stability of Cu-Based Metallic Glass

作　　者：张登伟[1] 滕新营[1] 李波[1] 张文洁[1] 

机构地区：[1]济南大学材料科学与工程学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2011年第1期43-46,共4页Journal of University of Jinan(Science and Technology)

基　　金：山东省自然科学基金(Y2007F69);山东省优秀中青年科学家科研奖励基金(2008BS04018)

摘　　要：采用铜模吸铸法制备直径为5 mm的Cu45Zr45.5-yTi9.5Aly(y=2,4,6,8)块体非晶合金试样,研究添加Al对合金非晶形成能力的影响。经X射线衍射(XRD)、扫描电镜(SEM)和差示扫描量热分析(DSC)做结构及热稳定性分析,结果表明,当x(Al)=6%时合金系的非晶形成能力最强,过冷液相区最宽,Δtx为65.3℃,约化玻璃转变温度trg为0.61。而当x(Al)=4%时,约化玻璃转变温度trg最大为0.64,但过冷液相区Δtx仅为48.4℃。The Cu45Zr45.5-yTi9.5Aly（y=2,4,6,8） bulk metallic glass （BMG） alloys were synthesized in copper mold casting in an argon atmosphere. The effect of A1 on the glass forming ability （GFA） was analyzed. The mierostructure and thermal properties were investigated by means of X-ray diffraction （XRD）, scanning electron microscope （SEM） as well as differential scanning calorimetrieally （DSC）, separately. The results show that when x （Al） = 6%, the glass forming ability（GFA） and thermal stability are the best. The alloy has the largest supercooled liquid region, about 65.3 ℃, and the glass transition temperature （ trg ） is 0.61. Whereas the samples with x（Al） = 4% exhibit the best trg ,which is 0.64, however, the supercooled liquid region is only 48.4℃.

关 键 词：非晶合金 玻璃形成能力 热稳定性 铜模吸铸法 

分 类 号：TG139.8[一般工业技术—材料科学与工程]