Fabrication and characterization of HA-ZrO2-MWCNT ceramic composites

Y. H. Meng, Chak Yin Tang, Chi Pong Tsui, P. S. Uskokovic

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

In this article, a new kind of hydroxyapatite-zirconia-carbon nanotube (HA-ZrO2-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 HAZrO2-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.
Original languageEnglish
Pages (from-to)871-882
Number of pages12
JournalJournal of Composite Materials
Volume44
Issue number7
DOIs
Publication statusPublished - 23 Apr 2010

Keywords

  • Calcia-zirconia
  • Carbon nanotubes
  • Ceramic composites
  • Hydroxyapatite

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry

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