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Sintering behavior of hydroxyapatite ceramics prepared by different routes

Chou Yong, Tan and Singh, Ramesh and Khai Liang, Aw and Wei Hong, Yeo and Sopyan, Iis and Wan Dung, Teng (2009) Sintering behavior of hydroxyapatite ceramics prepared by different routes. In: 33rd International Conference & Exposition on Advanced Ceramics and Composites 2009, 18 - 23 January 2009, Daytona Beach, FL, United States.

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Abstract

The sintering behaviour of three different HA, i.e. a commercial HA(C) and synthesized HA by wet precipitation, HA(W) and mechanochemical method, HA(M) were investigated over the temperature range of 1000°C to 1350°C. In the present research, a wet chemical precipitation reaction was successfully employed to synthesize highly crystalline, high purity and single phase stoichiometric HA powder that is highly sinteractive particularly at low temperatures below 1100°C. It has been revealed that the sinterability and mechanical properties of the synthesized HA by this method was significantly higher than that of the commercial material and HA which was synthesized by mechanomical method. The optimum sintering temperature for the synthesized HA(W) was 1100°C with the following properties being recorded: 99.8% relative density, Vickers hardness of 7.04 GPa and fracture toughness of 1.22 MPam½. In contrast, the optimum sintering temperature for the commercial HA(C) and synthesized HA(M) was 1300°C with relative density of 98% and 95.5%, Vickers hardness of 5.47 GPa and 4.73 GPa, fracture toughness of 0.75 MPam½ and 0.82 MPam½ being measured, respectively.

Item Type: Conference or Workshop Item (Full Paper)
Additional Information: 4809/10895
Uncontrolled Keywords: sintering behavior, hydroxyapatite ceramics
Subjects: Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering
Depositing User: PROF. DR. IIS SOPYAN
Date Deposited: 29 Apr 2015 14:40
Last Modified: 29 Apr 2015 14:40
URI: http://irep.iium.edu.my/id/eprint/10895

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