Synthesis, Sintering and Microstructural Characterization of Nanocrystalline Hydroxyapatite Composites

Abstract

Nanocrystalline hydroxyapatite (HAp) exhibits better bioactivity and biocompatibility with enhanced mechanical properties compared to the microcrystalline counterpart. In the present work, nanocrystalline hydroxyapatite was synthesized by wet chemical method. Sintering was carried out with nanocrystalline alumina as additive, the content of alumina being varied from 10 to 30 wt% in the composite. For 20 and 30 wt % Al2O3, hydroxyapatite decomposed into tricalcium phosphate (TCP) above the sintering temperature of 1100 deg C. The fracture toughness of nano HAp-nano Al203 composite is anisotropic in nature and reached a maximum value of 6.9 MPa m 1/2.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2005
Accession Number
ADP019738

Entities

People

  • Arvind Sinha
  • B. Viswanath
  • N. Ravishankar
  • Suprabha Nayar

Organizations

  • Indian Institute of Science, Bengaluru

Tags

DTIC Thesaurus Topics

  • Chemical Compounds
  • Composite Materials
  • Electron Microscopy
  • Engineered Materials
  • Grain Size
  • Hydroxides
  • Materials
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Nanocomposites
  • Particle Size
  • Particles
  • Physical Properties
  • Scanning Electron Microscopy
  • Toughness

Fields of Study

  • Materials science

Readers

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