不同直径的Zr_(60.3)Ni_(16.2)Cu_(13.5)Al_(10)块体非晶合金的力学性能  

Mechanical Properties of Zr_(60.3)Ni_(16.2)Cu_(13.5)Al_(10) Bulk Metallic Glasses in Different Diameters

作　　者：寇生中[1,2] 杨芳[1] 黄文军[1] 尚沙沙[1] 陈延[1] 

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 [2]兰州理工大学有色金属合金省部共建教育部重点实验室,甘肃兰州730050

出　　处：《铸造技术》2011年第4期459-461,共3页Foundry Technology

摘　　要：采用铜模吸铸法制备了阶梯型的Zr60.3Ni16.2Cu13.5Al10非晶合金,利用X射线衍射(XRD)分别对直径为3 mm、4 mm、6 mm的合金试样进行结构分析,利用万能试验机及扫描电镜对试样进行压缩试验和断口形貌分析。研究表明,由于冷却速度的影响,直径为3 mm时是非晶结构,直径为4 mm和6 mm时是中心晶体和表面非晶体混合结构;对于Zr60.3Ni16.2Cu13.5Al10合金,直径为3 mm时断裂强度可达到1 775 MPa,塑性变形可达到2.02%,而直径为4 mm的非晶复合材料的塑性变形可达2.93%,适当体积的晶体相的加入可以有效地提高非晶材料的塑性。The step samples of Zr60.3Ni16.2Cu13.5Al10 amorphous alloy were prepared by suction casting process with copper mold in the least diameter is 3 mm and largest diameter is 6 mm,and the diameter of the middle section is 4 mm.X-ray diffraction（XRD） was used to characterize the evolution of structure for difference diameter such as 3 mm、4 mm、6 mm.Compression tests were conducted on the cylindrical specimens at room temperature using universal testing machine.The appearances of the sample fractures were examined using scanning electron microscopy（SEM）.The results show that because the cooling rate has a great influence on the microstructure of Zr60.3Ni16.2Cu13.5Al10 alloy,the ally is bulk metallic glass when the diameter is 3 mm,while as the diameter are 4 mm and 6 mm the alloy are the hybrid structure of crystal and amorphous.For the alloy of Zr60.3Ni16.2Cu13.5Al10,the strength is 1 775 MPa as the diameter is 3 mm and its plastic deformation is 2.02%,for the amorphous composites its plastic deformation is 2.93% when the diameter is 4 mm.From that we can know that the plasticity of amorphous materials can be effectively improved when the appropriate volume of crystalline phase mixing in the.

关 键 词：大块非晶 Zr60.3Ni16.2Cu13.5Al10合金 力学性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]