Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 24, Issue 7, Pages 2331-2336Publisher
ELSEVIER
DOI: 10.1016/S1003-6326(14)63353-7
Keywords
aluminum matrix composites; carbon nanotubes; chemical vapor deposition; in-situ synthesis
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Funding
- National Natural Science Foundation of China [51071107, 51001080, 51201056]
- National Basic Research Program of China [2010CB934703]
- Science and Technology Plan Project of Hebei Province, China [13211027]
- Outstanding Youth Science and Technology Innovation Fund of Hebei University of Technology, China [2011008]
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Using nickel catalyst supported on aluminum powders, carbon nanotubes (CNTs) were successfully synthesized in aluminum powders by in-situ chemical vapor deposition at 650 degrees 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.
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