Fabrication of Carbon Nanotube-Reinforced 6061Al Alloy Matrix Composites by an In Situ Synthesis Method Combined with Hot Extrusion Technique

作     者：Chun-Nian He Chao Feng Ji-Chuan Lin En-Zuo Liu Chun-Sheng Shi Jia-Jun Li Nai-Qin Zhao 

作者机构：School of Materials Science and Engineering Tianjin KeyLaboratory of Composite and Functional MaterialsTianjin University Tianjin 300072 China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China Chengdu SIWI High-Tech Industry Co. LtdChengdu 611731 China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2016年第29卷第2期

页      面：188-198页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the High Technology Research and Development Program of China(No.2013AA031002) National Natural Science Funds for Excellent Young Scholar(No.51422104) the National Natural Science Foundation of China(Nos.51531004 51272173 and 51472177) 

主　　题：Metal matrix composites (MMCs) Microstructure Mechanical properties Carbon 

摘      要：Carbon nanotube （CNT）-reinforced 6061Al alloy matrix composites were prepared by chemical vapor depo- sition （CVD） combined with hot extrusion technique. During the preparation process, the 6061Al flakes obtained by ball milling of the 6061Al spherical powders were subjected to surface modification to introduce a hydrophilic polyvinyl alcohol （PVA） membrane on their surface （6061Al@PVA） to bond strongly with nickel acetate [Ni（II）]. Then the 6061Al@PVA flakes bonded with Ni（II） were calcined and reduced to Ni nanoparticles, which were then heat-treated at 580 ℃ to remove PVA for obtaining even Ni/6061Al catalyst. After that, the as-obtained Ni/6061Al catalyst was employed to synthesize CNTs on the surface of the 6061Al flakes by CVD. After hot extrusion of the CNT/6061Al composite powders, the as-obtained CNT/6061Al bulk composites with 2.26 wt% CNTs exhibited 135% increase in yield strength and 84.5% increase in tensile strength compared to pristine 6061Al matrix.