Nb对Cu基非晶合金热加工及力学性能的影响  

Effect of Nb on hot working and mechanical properties of Cu-based metallic glasses

作　　者：张丹[1,2] 邱克强[1] 任英磊[1] 胡壮麒[3] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870 [2]沈阳化工大学材料科学与工程学院,沈阳110142 [3]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016

出　　处：《沈阳工业大学学报》2016年第2期159-163,共5页Journal of Shenyang University of Technology

基　　金：教育部高等学校博士学科点专项科研基金资助项目(20132102110005);国家重点基础研究发展计划(973计划)项目(2011CB606301)

摘　　要：为了提高Cu基非晶合金的热加工性能和力学性能,采用铜模铸造法制备了直径为2 mm的Cu47Zr47-xAl6Nbx非晶合金.分别利用X射线衍射仪、扫描电子显微镜、差示扫描量热计和电子万能试验机对Cu47Zr47-xAl6Nbx非晶合金的相组成、显微组织、热力学参数和力学性能进行了研究.结果表明,适量的Nb元素可以提高Cu47Zr47-xAl6Nbx非晶合金的热加工和力学性能.Cu47Zr47Al6非晶合金的过冷液相区和断裂强度分别为53.5 K和1 528 MPa.当Nb元素的原子分数为2%时,Cu47Zr45Al6Nb2非晶合金具有最大的过冷液相区和断裂强度,且可以分别达到69.0 K和1 830 MPa.In order to improve the hot working and mechanical properties of Cu-based metallic glasses, the Cu47Zr47-xAl6Nbx metallic glasses with the diameter of 2 mm was prepared with copper mold casting method. The phase constitution, microstructure, thermodynamic parameters and mechanical properties of Cu47Zr47-xAl6Nbx metallic glasses were investigated with X ray diffractometer（XRD）, scanning electron microscope （SEM）, differential scanning calorimeter （DSC）and universal electronic testing machine. The results show that the proper Nb element can improve both hot working and mechanical properties of Cu47Zr47-xAl6Nbx metallic glasses. The supercooled liquid region and fracture strength of Cu47Zr47Al6 metallic glass are 53.5 K and 1 528 MPa, respectively. When the atom fraction of Nb element is 2%, the Cu47Zr45Al6Nb2 metallic glass has the largest supercooled liquid region and fracture strength, which are 69.0 K and 1 830 MPa, respectively.

关 键 词：Cu47Zr47-xAl6Nbx非晶合金 铜模铸造 微合金化 Nb元素 热加工 力学性能 脆性断裂 断口 

分 类 号：TG139.8[一般工业技术—材料科学与工程]