原位合成CNTs/Cu-Al_(2)O_(3)复合材料的性能研究  

Study on the properties of in-situ synthesized CNTs/Cu-Al_(2)O_(3) composites

作　　者：陈杰茹 刘平[1] CHEN Jieru;LIU Ping(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学材料与化学学院,上海200093

出　　处：《有色金属材料与工程》2023年第1期31-39,共9页Nonferrous Metal Materials and Engineering

基　　金：国家自然科学基金青年基金资助项目(51201107)。

摘　　要：对Al的质量分数分别为0.20%,0.35%,0.60%的Cu-Al合金粉末进行内氧化,得到CuAl_(2)O_(3)粉末。采用化学气相沉积法在Cu-Al_(2)O_(3)粉末表面原位生长碳纳米管(carbon nano tubes,CNTs),采用放电等离子烧结工艺成功制备了CNTs/Cu-Al_(2)O_(3)复合材料。采用扫描电子显微镜和透射电子显微镜观察了CNTs/Cu-Al_(2)O_(3)复合粉末、复合材料断口的形貌。采用显微硬度计、微拉伸试验机、摩擦磨损试验机分别对纯Cu及复合材料的维氏硬度、抗拉强度、摩擦因数进行测试。采用电化学工作站测试复合材料在3.5%NaCl(质量分数)水溶液中的耐腐蚀性能。结果表明,随着Al的质量分数的增加,粉末表面合成的CNTs的数量也增多。Al的质量分数为0.35%时,CNTs/Cu-Al_(2)O_(3)复合材料的综合性能最佳,与纯Cu相比,复合材料的抗拉强度和腐蚀电势分别提高了86.4%和43.2%,分别为315 MPa和-0.268 V,摩擦因数降低了53.3%,仅为0.28。Cu-Al_(2)O_(3)powder was obtained by internal oxidation of Cu-Al alloy powder with mass fraction of 0.20%,0.35%and 0.60%Al.Carbon nanotubes(CNTs)were in-situ grown on the surface of Cu-Al_(2)O_(3)powder by chemical vapor deposition,and CNTs/Cu-Al_(2)O_(3)composites were successfully prepared by spark plasma sintering.The composite powder and the fracture morphology of composite material were observed by scanning electron microscope and transmission electron microscope.The hardness,tensile strength,and friction coefficient of Cu and its composite materials were tested by microhardness tester,micro-tensile tester,and friction and wear tester.The corrosion resistance of the composite material in 3.5%NaCl(mass fraction)aqueous solution was tested by electrochemica workstation.The results show that the number of CNTs synthesized on the powder surface increased with the increase of Al mass fraction.When the mass fraction of Al is 0.35%,the comprehensive properties of CNTs/Cu-Al_(2)O_(3)composite are the best.Compared with pure copper,the tensile strength and corrosion potential of the composite are increased by 86.4% and 43.2%,respectively,which are 315 MPa and-0.268 V,respectively.The friction coefficient is reduced by 53.3%,which is only 0.28.

关 键 词：CNTs/Cu-Al_(2)O_(3)复合材料 碳纳米管 化学气相沉积 

分 类 号：TB333[一般工业技术—材料科学与工程]