Synthesis of uniformly dispersed carbon nanotube reinforcement in Al powder for preparing reinforced Al composites

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• 作者：Xudong  ; Yang^a ; Chunsheng  ; Shi^a ; Chunnian  ; He^a ; Enzuo  ; Liu^a ; Jiajun  ; Li^a ; Naiqin  ; Zhao^a ;   ; ^b ;   ; ^{nqzhao@tju.edu.cn}
• 关键词：A. Nano-structures ; A. Metal&ndash ; matrix composites (MMCs) ; B. Mechanical properties ; E. Chemical vapor deposition (CVD)
• 刊名：Composites Part A: Applied Science and Manufacturing (Incorporating Composites and Composites Manufacturing)
• 出版年：2011
• 出版时间：November 2011
• 年：2011
• 卷：42
• 期：11
• 页码：1833-1839
• 全文大小：1483 K

文摘

In order to obtain homogeneously dispersed carbon nanotube (CNT) reinforcement with well structure in Al powder, a novel and simple approach was developed as a means of overcoming the limits of traditional mixing methods. This process involves the even deposition of Ni catalyst onto the surface of Al powder by impregnation route with a low Ni content (0.5 wt. % ) and in situ synthesis of CNTs in Al powder by chemical vapor deposition. The in situ synthesized CNTs with well-crystallized bamboo-like structure in the composite powders can obviate the reaction with Al below 1000 ¡ãC. The feasibility of fabricating CNT/Al composites with high mechanical properties using the as-prepared composite powders was proved by our primary test, which indicated that the compressive yield stress and elastic modulus of 1.5 wt. % -CNT/Al composites synthesized by hot extrusion are 2.2 and 3.0 times as large as that of the pure Al matrix.