Effect of Temperature and Time on the Sintering, Phase Stability, Microstructure and Microhardness of Commercially Available Hydroxyapatite

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A commercially available hydroxyapatite (HA) was sintered for a number of sintering temperatures and times between 1150°C to 1350°C and 0 to 12 hours respectively. Full density was reached after sintering for 1.5 hours at 1250°C and a maximum microhardness of 4.9GPa was achieved after 6 hours at 1300°C. Significant grain growth occurred but did not seem to influence the microhardness observed. Significant decomposition was observed after sintering at 1350°C for 1.5 which lead to major decreases in microhardness. An activation energy for grain growth of 286 kJ.mol-1 was calculated which is substantially higher than that previously noted for HA.

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Periodical:

Key Engineering Materials (Volumes 284-286)

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Edited by:

Panjian Li, Kai Zhang and Clifford W. Colwell, Jr.

Pages:

345-348

Citation:

F.P. Cox et al., "Effect of Temperature and Time on the Sintering, Phase Stability, Microstructure and Microhardness of Commercially Available Hydroxyapatite ", Key Engineering Materials, Vols. 284-286, pp. 345-348, 2005

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April 2005

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$38.00

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