中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 24 No. 7 July 2014 |
（1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;
2. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;
3. School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China）
Abstract:Using nickel catalyst supported on aluminum powders, carbon nanotubes (CNTs) were successfully synthesized in aluminum powders by in-situ chemical vapor deposition at 650 °C. Structural characterization revealed that the as-grown CNTs possessed higher graphitization degree and straight graphite shell. By this approach, more homogeneous dispersion of CNTs in aluminum powders was achieved compared with the traditional mechanical mixture methods. Using the in-situ synthesized CNTs/Al composite powders and powder metallurgy process, CNTs/Al bulk composites were prepared. Performance testing showed that the mechanical properties and dimensional stability of the composites were improved obviously, which was attributed to the superior dispersion of CNTs in aluminum matrix and the strong interfacial bonding between CNTs and matrix.
Key words: aluminum matrix composites; carbon nanotubes; chemical vapor deposition; in-situ synthesis
