Synthesis, sintering and microstructural characterization of nanocrystalline Hydroxyapatite Composites

Viswanath, B and Ravishankar, N and Nayar, S and Sinha, A (2005) Synthesis, sintering and microstructural characterization of nanocrystalline Hydroxyapatite Composites. In: Symposium on Nanoscale Materials Science in Biology and Medicine held at the 2004 MRS Fall Meeting, NOV 28-DEC 02, 2004, Boston.

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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 degrees C. The fracture toughness of nano HAp-nano Al2O3 composite is anisotropic in nature and reached a maximum value of 6.9 MPa m(1/2).

Item Type:	Conference Paper
Publisher:	The Materials Research Society
Additional Information:	Copyright of this article belongs to The Materials Research Society.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	04 Jun 2010 10:18
Last Modified:	05 Aug 2011 09:15
URI:	http://eprints.iisc.ac.in/id/eprint/27545

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