Al2O3弥散增强Cu基高导电率复合材料的制备及性能研究  

Manufacturing process and properties of Al_2O_3 dispersion strengthened copper-based composite with high electrical conductivity

作　　者：张一帆[1,2] 纪箴[1] 刘贵民[2] 贾成厂[3] 陈珂[1] 刘博文[3] 杨忠须 Zhang Yifan Ji Zhen Liu Guimin Jia Chengchang Chen Ke Liu Bowen Yang Zhongxu(School of Material Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China Faeuhy of Remanufacturing Engineering, Academy of Armored Forces Engineering, Beijing 100072, China Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]装甲兵工程学院装备再制造工程系,北京100072 [3]北京科技大学新材料技术研究院,北京100083

出　　处：《粉末冶金技术》2016年第5期346-350,367,共6页Powder Metallurgy Technology

基　　金：国家“973”计划(2014GB120000);国家自然基金项目(51471023);北京市自然科学基金资助项目(No.2152031)

摘　　要：采用高能球磨结合放电等离子烧结的方法制备0.5%、1.0%和2.0%的Al_2O_3弥散增强Cu基复合材料。研究Al_2O_3在Cu基体中的分布状态,以及对复合材料强度、硬度、导电性能和摩擦系数的影响。结果表明:弥散分布于晶界处的Al_2O_3颗粒导致复合材料的硬度和抗拉强度都提高,而伸长率、电导率降低和摩擦系数降低。1.0%Al_2O_3/Cu复合材料的相对密度达到98.22%、电导率为48.38 MS/m,硬度102.7 HV,抗拉强度264.97 MPa,摩擦系数0.28。In this paper,Al_2O_3 dispersion strengthened copper-based composites with mass fraction of 0. 5% 、1. 0%和 2. 0% were prepared by high-energy ball milling and spark plasma sintering. The distribution of Al_2O_3 and its effect on the strength,hardness,electrical conductivity and friction coefficient in the copper-based composite were studied. The results show that the hardness and tensile strength of composite were improved by the Al_2O_3 particles dispersed in the grain boundary,while the elongation,conductivity and friction coefficient were decreased. The relative density, electrical conductivity, hardness tensile strength and friction coefficient of 1. 0 % Al_2O_3/ Cu composite reached respectively 98. 22%,48. 38 MS / m,102. 7 HV,264. 97 MPa and 0. 28.

关 键 词：高能球磨 SPS烧结 Al2O3弥散增强Cu基复合材料 电导率 摩擦系数 

分 类 号：TB33[一般工业技术—材料科学与工程]