Fabrication and Characterization of HA-ZrO 2 -MWCNT Ceramic Composites

In this article, a new kind of hydroxyapatite-zirconia-carbon nanotube (HA-ZrO 2 -MWCNT) ceramic composites was fabricated to enhance the mechanical properties of a hydroxyapatite (HA) ceramic for satisfying various requirements in bone rehabilitation. A new dispersing process was proposed to ensure...

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Bibliographic Details
Published in:Journal of composite materials 2010-04, Vol.44 (7), p.871-882
Main Authors: Meng, Y.H., Tang, C.Y., Tsui, C.P., Uskokovic, P.S.
Format: Article
Language:English
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Summary:In this article, a new kind of hydroxyapatite-zirconia-carbon nanotube (HA-ZrO 2 -MWCNT) ceramic composites was fabricated to enhance the mechanical properties of a hydroxyapatite (HA) ceramic for satisfying various requirements in bone rehabilitation. A new dispersing process was proposed to ensure a homogeneous distribution of multi-wall carbon nanotubes (MWCNTs) in the HA ceramic matrix. The flexural strength and fracture toughness of the HAZrO 2 -CNT composites were enhanced by about 126% and 124%, respectively, as compared with those of the unmodified HA ceramics. The X-ay diffraction analysis revealed that a small quantity of HA decomposed in the composites with introduction of strengthening phases. The in vitro test results showed that the sample surfaces were covered with a new apatite layer after immersion in simulated body fluid for 10 days, indicating good biocompatibility of the composites.
ISSN:0021-9983
1530-793X
DOI:10.1177/0021998309349552