碳纳米管和氧化铝颗粒协同增强铜基复合材料的制备与性能研究  

Preparation and properties of copper matrix composites reinforced by CNTs and Al_2O_3

作　　者：张政委[1] 纪箴[1] 贾成厂[1] 张一帆[1] 唐怡[1] 吕莹莹[1] Zhang Zhengwei Ji Zhen Jia Chengchang Zhang Yifan Tang YI Lv Yingying(School of Materials Science and Engineering, 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

出　　处：《粉末冶金技术》2016年第5期356-360,共5页Powder Metallurgy Technology

基　　金：国家自然科学基金(51471023);国家"973"计划(2014GB120000)

摘　　要：本文首先利用碱式高锰酸钾对纯化后的CNTs进行改性处理,然后用分子水平法制得前驱体CNTs/Cu复合粉末,最后用内氧化方法,结合放电等离子烧结获得CNTs、Al_2O_3/Cu复合材料。结果表明:CNTs、Al_2O_3/Cu复合材料的维氏硬度(136)和抗拉强度(226 MPa)均优于两个增强相单独作用的铜基材料;材料的断后伸长率超过纯铜(40.1%),达到43.6%,表现出非常好的塑性;CNTs和Al_2O_3两个增强相对铜基材料导电率起到了协同增强作用,达到了1+1>2的效果。In this study,in order to attain copper matrix composite materials reinforced with CNTs and Al_2O_3,the purified CNTs were modified by KMn O4treatment-alkaline solution first, CNTs / Cu O composite powders were prepared using molecular level mixing method,then the composites were produced by internal oxidation and spark plasma sintering. The results show that both Vickers hardness（ 136） and tensile strength（ 226 MPa） of CNTs、Al_2O_3/ Cu composites were higher than that of copper based composites reinforced by one wild phase alone,and the elongation after fracture increase by 43. 6% compared to the pure Cu bulk（ 40. 1%）,showing wonderful ductility.Additionally,CNTs and Al_2O_3 have played the synergy in maintaining high-conductivity of copper,in other words,1 ＋ 1〉 2.

关 键 词：铜基复合材料 协同增强 分子水平法 内氧化方法 放电等离子烧结 

分 类 号：TB333[一般工业技术—材料科学与工程]