Manufacturing of high toughness hydroxyapatite produced by wet chemical method

Ranna Tolouei, Ramesh Singh, Chou Yong Tan, Meenaloshini Satgunam, Mahdi Amiriyan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Hydroxyapatite (HA) is among the leading ceramic materials for hard tissue replacement implants. Despite the excellent bioactivity of HA, low toughness has limited the application of these materials to non-load bearing areas. The sinterability of nanocrystalline hydroxyapatite (HA) powder via new heating profile for conventional pressureless sintering was studied. The starting nanocrystalline HA powder was synthesized by wet chemical precipitation method. After uniaxial pressing followed by isostatic pressing, HA powder compacts are sintered over the temperature range of 1000°C to 1300°C. Different holding time of 1 minute and 120 minutes was applied as a heating profile of HA samples. The results revealed that new heating profile was effective in producing a HA body with high density of 98% when sintered at 1200°C. Subsequently, mechanical properties such as fracture toughness and hardness, of HA compacts increased with decrease in grain size. HA showed the highest hardness of 9.51 GPa and fracture toughness of 1.41 MPa.m1/2 when sintered at 1100 °C. XRD analysis indicated that decomposition of HA phase during sintering at high temperatures do not occur. Short holding time leads to finer microstructure of HA and subsequently better mechanical properties.

Original languageEnglish
Title of host publicationMechanical and Aerospace Engineering
Pages1289-1295
Number of pages7
DOIs
Publication statusPublished - 01 Jan 2012
Event2nd International Conference on Mechanical and Aerospace Engineering, ICMAE 2011 - Bangkok, Thailand
Duration: 29 Jul 201131 Jul 2011

Publication series

NameApplied Mechanics and Materials
Volume110-116
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Other

Other2nd International Conference on Mechanical and Aerospace Engineering, ICMAE 2011
CountryThailand
CityBangkok
Period29/07/1131/07/11

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Tolouei, R., Singh, R., Tan, C. Y., Satgunam, M., & Amiriyan, M. (2012). Manufacturing of high toughness hydroxyapatite produced by wet chemical method. In Mechanical and Aerospace Engineering (pp. 1289-1295). (Applied Mechanics and Materials; Vol. 110-116). https://doi.org/10.4028/www.scientific.net/AMM.110-116.1289