Cu@CNTs增强铝基复合材料的显微组织和力学性能  

Microstructure and mechanical properties of aluminum matrix composites reinforced by Cu@CNTs

作　　者：曾敏[1] 何苗[1] 简正豪[1] 张雪莲 蒋云清 ZENG Min;HE Miao;JIAN Zhenghao;ZHANG Xuelian;JIANG Yunqing(School of Mechanical and Vehicle Engineering,Nanchang Institute of Science and Technology,Nanchang 330108,China)

机构地区：[1]南昌工学院机械与车辆工程学院,江西南昌330108

出　　处：《兵器材料科学与工程》2022年第5期164-169,共6页Ordnance Material Science and Engineering

摘　　要：用液相还原法在碳纳米管表面包覆纳米铜(Cu@CNTs),以其为增强相铸造Cu@CNTs增强铝基复合材料。用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)对复合材料的形貌和结构进行表征,用拉伸试验测试铝基复合材料的力学性能。结果表明:均匀分布在CNTs表面的Cu纳米颗粒作为CNTs与基体间的过渡层,锁定CNTs并促进CNTs-Al界面结合。相比铝基体,Cu@CNTs的质量分数为1.5%的铝基复合材料的屈服强度和抗拉强度为196、259MPa,提高了55.6%、34.8%。力学性能提高主要由于纳米铜优化了CNTs和铝基体的界面结合,使载荷从基体到CNTs高效转移。CNTs surface-modified by Cu nanopatricles(Cu@CNTs)were fabricated by the liquid phase reduction method,and it was used as the reinforcement to prepare aluminum matrix composite(AMCs)via casting.The morphology and microstructure of Cu@CNTs/Al composites were investigated by XRD,SEM,TEM.The mechanice properties of Cu@CNTs/Al were evaluated by tensile test.The results show that Cu nanoparticles homogeneously disperse on the surface of CNTs and act as an interlayer structure between CNTs and matrix,locking the CNTs and improving the CNTs-Al interfacial bonding.The Cu@CNTs/Al composite with Cu@CNTs addition of 1.5%displays high mechanical properties with yield strength and ultimate tensile strength of 196 MPa and 259 MPa,which are 55.6%and 34.8%higher than those of matrix,respectively.The better mechanical properties may be attributed to good interfacial bonding optimized by the presence of Cu nanoparticles,leading to an effective load transfer from matrix to CNTs.

关 键 词：Cu@CNTs 表面修饰 铝基复合材料 显微组织 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]