Sintering behavior of nanocrystalline hydroxyapatite produced by wet chemical method

Ramesh, Singh and Tolouei, R. and Hamdi, M. and Purbolaksono, J. and Tan, C.Y. and Amiriyan, M. and Teng, W.D. (2011) Sintering behavior of nanocrystalline hydroxyapatite produced by wet chemical method. Current Nanoscience, 7 (6). pp. 845-849. ISSN 1573-4137, DOI

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The sintering behavior of synthesized nanocrystalline hydroxyapatite (HA) powder was investigated in terms of phase stability and mechanical properties. A wet chemical precipitation method was successfully employed to synthesize a high purity and single phase HA powder. After shaping, HA powder compacts have been sintered over the temperature range of 1000 degrees C to 1300 degrees C. Two different sintering holding times of 1 minute and 120 minutes were investigated. The results revealed that the 1 minute holding time profile was effective in suppressing grain growth and producing a HA body with improved densification. Additionally, higher mechanical properties such as Young's modulus of 119 GPa, high fracture toughness of 1.41 MPa.m(1/2) and hardness of 9.5 GPa were obtained for this sample as compared to HA bodies when sintered using the 120 minutes holding time. The study revealed for the first time that HA could be sintered using a 1 minute holding time without compromising on HA phase stability and mechanical properties.

Item Type: Article
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Uncontrolled Keywords: Hydroxyapatite; bioceramic; sintering; mechanical properties; Wet chemical method
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TS Manufactures
Divisions: Faculty of Engineering
Depositing User: Mr. Mohammed Salim Abd Rahman
Date Deposited: 02 Jul 2013 02:20
Last Modified: 18 Nov 2019 02:59

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