Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-14T18:45:02.289Z Has data issue: false hasContentIssue false
  • English
  • Français

Synthesis, Sintering and Microstructural Characterization of Nanocrystalline Hydroxyapatite Composites

Published online by Cambridge University Press:  01 February 2011

B. Viswanath ,
N. Ravishankar ,
Suprabha Nayar  and
Arvind Sinha
B. Viswanath
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore, India.
N. Ravishankar
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore, India.
Suprabha Nayar
Affiliation:
National Metallurgical Laboratory, Jamshedpur, India.
Arvind Sinha
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore, India. National Metallurgical Laboratory, Jamshedpur, India.
Get access

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°C. The fracture toughness of nano HAp-nano Al2O3 composite is anisotropic in nature and reached a maximum value of 6.9 MPa m1/2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 845: Symposium AA – Nanoscale Materials Science in Biology and Medicine , 2004 , AA5.31
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCE

1. Hench, L. L., Journal of American Ceramic society, 1991. 74(7), p.1487– 510.Google Scholar
2. Han, Y., Li, S., Wang, X., and Chen, X., MRS Bulletin, 2004. 39(1), p.25–32.Google Scholar
3. Ahn, E.S., Gleason, N. J., Nakahira, A., and Ying, J.Y., Nano Letters, 2001. 1(3), p.149–153.Google Scholar
4. Li, J., Fartash, B., and Hermansson, L., Biomaterials, 1995. 16, p.417–422.Google Scholar
5. Gautier, S., Champion, E., and Bernache-Assollant, D., Journal of the European Ceramic Society, 1997. 17, p.1361–1369.Google Scholar
6. Li, W. and Gao, L., Biomaterials, 2003. 24, p.937–940.Google Scholar
7. Ponton, C.B. and Rawlings, R.D., Mterials Science Technology, 1989. 5, p.865–871.Google Scholar
8. Pang, Y.X., Bao, X., and Weng, L., Journal of Materials Science, 2004. 39, p.6311–6323.Google Scholar
9. Rao, R.R. and Kannan, T.S., Materials Science and Engineering, 2002. C 20, p.187–193.Google Scholar
10. Engin, N.O. and Tas, A.C., Journal of European Ceramic Society, 1999. 19, p.2569–2572.Google Scholar