Al对Cu_((48-x))Zr_(52)Al_x非晶合金玻璃形成能力和力学性能的影响  

Effect of Al Addition on Glass Forming Ability and Mechanical Properties of Cu_((48-x))Zr_(52)Al_x Bulk Metallic Glasses

作　　者：王攀峰[1] 范新会[1] 李炳[1] 杨珂[1] 徐旋旋 WANG Panfeng FAN Xinhui L I Bing YANG Ke XU Xuanxuan(School of Materials and Chemical Engineering, Xi ＇ an Technological University, Xi＇ an 710021, China)

机构地区：[1]西安工业大学材料与化工学院,西安710021

出　　处：《西安工业大学学报》2017年第5期411-415,共5页Journal of Xi’an Technological University

基　　金：陕西省教育厅专项科研计划项目(14JK1351);西安工业大学校长基金(0852-302021407)

摘　　要：为了研究Al的添加对Cu-Zr基合金非晶形成能力以及力学性能的影响,通过铜模吸铸法制备Cu_((48-x))Zr_(52)Al_x(x=6,7,8,9,10)块体非晶合金.采用X射线衍射仪对合金的物相进行分析,通过差示量热仪研究了Al含量对Cu-Zr-Al块体非晶合金玻璃形成能力的影响,对合金进行室温压缩力学性能测试,利用扫描电镜观察合金断口形貌.结果表明:适当增加Al的含量,可以提高合金的玻璃形成能力,当Al元素的含量(原子数百分数)为9%时,Cu_(39)Zr_(52)Al_9的过冷液相区宽度ΔT达到57.34K,玻璃形成能力最好;适量Al的加入有利于提高合金的力学性能,当Al的含量为8%时,Cu_(40)Zr_(52)Al_8具有最佳的力学性能,其压缩断裂强度为2137MPa,试样断裂夹角约为45°;在Cu_(40)Zr_(52)Al_8合金的室温压缩实验中,出现明显的锯齿流变现象.In order to study the effects of Al on the glass forming ability（GFA）and the mechanical properties of Cu-Zr based alloy at room temperature,Cu_（（48-x））Zr_（52）Al_x（x=6,7,8,9,10）alloys were produced by using copper-mold casting.X-ray diffraction（XRD）and differential scanning calorimetry（DSC）were used to investigate its phase and glass forming ability（GFA）.Compression tests were performed and the fracture morphology was analyzed with scanning electron microscope（SEM）.The results showed that appropriate Al addition content enhanced glass forming ability of the Cu-Zr-Al BMGs,when the content of Al is 9%,the width of supercooled liquid region of Cu_（39）Zr_（52）Al_9 amorphous alloy reached 57.34 Kand the glass-forming ability is the best.The addition of proper amount of Al improved the mechanical properties of the alloy,when the content of Al was 8%,Cu_（40）Zr_（52）Al_8 alloy had the best mechanical properties,and its compressive strength was 2 137 MPa,the fracture angle was about45 degrees.The serrated flow appeard obviously,in the compression test of Cu_（40）Zr_（52）Al_8 alloy at the room temperature.

关 键 词：Cu-Zr-Al非晶合金 玻璃形成能力 力学性能 断口形貌 

分 类 号：TG139.8[一般工业技术—材料科学与工程]