Zr_(60)Al_(10)Cu_(30)合金的玻璃形成能力和力学性能  

Glass Forming Ability and Mechanical Properties of Zr_(60)Al_(10)Cu_(30) Alloy

作　　者：姚建忠[1] 寇生中[1,2] 于朋[1] 高凯雄[1] 马玉芳[3] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050 [3]金川集团股份有限公司,甘肃金昌737104

出　　处：《铸造技术》2012年第10期1139-1141,共3页Foundry Technology

基　　金：国家自然科学基金资助项目(50961008;51061008);973计划前期研究专项基金资助项目(2011CB612203)

摘　　要：利用铜模吸铸法制备了直径分别为3、4和6 mm的阶梯型Zr60Al10Cu30棒状试样,采用X射线衍射、扫描电镜和万能试验机等研究了所制备合金的玻璃形成能力(GFA)和力学性能。结果表明,Zr60Al10Cu30合金的非晶临界尺寸接近6 mm,具有较强的玻璃形成能力。其中全非晶结构的Ф4 mm合金块体金属玻璃的抗压强度、塑性应变分别为1 595 MPa和1.95%,断口呈现非晶典型的脉状纹络和脆性平滑区。在Ф6 mm处的原位生成晶体/非晶基复合材料中,新析出DO3结构的AlCu2Zr晶体相和Cu10Zr7共晶正交晶体相,增加了合金的脆性,最终断裂行为取决于塑性相和脆性相之间的竞争,致使其抗压强度和塑性应变分别为1 345 MPa和0.5%。The alloys rods of Zr60Al10Cu30 with diameters of 3 mm,4 mm and 6 mm were prepared by copper mould suction casting method.XRD,SEM and universal testing machine were employed to investigate glass forming ability（GFA）,compression mechanical properties and facture surface of the bulk alloys.The results indicate that the critical thickness of the bulk metallic glass（BMG） is about up to Ф6 mm.The Ф4 mm BMG exhibits compressive strength and compressive fracture strength of 1 595 MPa with plastic strain of 1.95%.The fracture surface appearance of the Ф4 mm BMG shows typical amorphous region of Choroid shape and brittle smooth.The Ф6 mm BMG composites,containing the brittle crystallizing phase AlCu2Zr with DO3 structure and Cu10Zr7 with orthorhombic structure,exhibits compressive strength of 1 345 MPa with plastic strain of 0.5%.The final fracture behavior is controlled by the competition of plastic phase and crystallizing phases,which cause the Ф6 mm samples destructive fault by brittle fracture.

关 键 词：ZrCu基块体金属玻璃 玻璃形成能力 力学性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]