Journal
CERAMICS INTERNATIONAL
Volume 31, Issue 6, Pages 893-896Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2004.10.002
Keywords
nanocomposites; mechanical properties; alumina
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A colloidal processing route was adopted to disperse multi-walled carbon nanotubes (MWNTs) into alumina powders homogenously. One weight percent MWNTs-alumina composites were prepared by hot pressing. It was found that when the sample was sintered at 1450 degrees C, the addition of carbon nanotubes (CNTs) 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. (c) 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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