Investigation on the Reinforcement of Multi-Walled Carbon Nanotubes on Alumina Matrix |
| Journal |
Advances in Science and Technology (Volume 51) |
| Volume |
Disclosing Materials at the Nanoscale |
| Edited by |
P. VINCENZINI and G. MARLETTA |
| Pages |
64-67 |
| DOI |
10.4028/www.scientific.net/AST.51.64 |
| Online since |
October, 2006 |
| Authors |
Jing Sun,
Lian Gao
|
| Keywords |
Aluminum, Multi-Walled Carbon Nanotubes (MWNT), Reinforcement |
| Abstract |
In this paper, a colloidal processing route was adopted to disperse multi-walled
carbon nanotubes (MWNTs) into alumina powders homogenously. Alumina matrix composites
containing 0.1 to 2 weight percent of MWNTs were successfully fabricated by pressureless sintering.
Also, 1wt% MWNTs-alumina composites were prepared by hot pressing for comparison. It was
found that when the sample was sintered at 1450oC, the addition of 1wt% carbon nanotubes led to
10% increase in bending strength compared with monolithic alumina. The reinforcement
mechanism was discussed based on the microstructure investigation. The broken nanotubes and
pullout of MWNTs at interfaces are efficient in transferring the load from the alumina matrix to the
nanotubes, leading to the improvement of the mechanical properties. |
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