Densification and Strengthening of Tricalcium Phosphate/Titania Composite by Hot Pressing

Abstract:

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Tricalcium phosphate [TCP, β-Ca3(PO4)2]/titania composite having high mechanical properties was prepared and characterized. The TiO2 and HAp powders, as starting materials, were synthesized by precipitation and hydrothermal methods, respectively. The sintered β-TCP/TiO2 composite was prepared by hot pressing at 1000°C for 30 min under the pressure of 30 MPa in N2 atmosphere or by pressureless sintering at 1200°C for 2 h in air with moisture protection. The influence of sintering condition on the microstructures and mechanical properties of the composite was investigated. During the sintering process, hydroxyapatite used as a starting material was decomposed to β-TCP and CaTiO3 at elevated temperature because TiO2 could accelerate the decomposition of hydroxyapatite. The hot-pressed composite with 98% of sintered density showed high hardnessvalue of 1080 Hv compared with the pure hydroxyapatite (600 Hv).

Info:

Periodical:

Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara

Pages:

101-104

DOI:

10.4028/www.scientific.net/KEM.317-318.101

Citation:

J. K. Lee et al., "Densification and Strengthening of Tricalcium Phosphate/Titania Composite by Hot Pressing", Key Engineering Materials, Vols. 317-318, pp. 101-104, 2006

Online since:

August 2006

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Price:

$35.00

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