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Microstructure and mechanical properties of hydroxyapatite ceramics with zirconia dispersion prepared by
K Ioku1, M Yoshimura, S Somiya
1Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Japan.
Biomaterials
|January 1, 1990
Abstract:
Hydroxyapatite ceramics with zirconia dispersion from fine powders synthesized hydrothermally were post-sintered at 1000-1300 degrees C under 200 MPa of argon for 1 h without capsules, after normal sintering in air at 1200 degrees C for 3 h. Densification was most significant with post-sintering at 1200 degrees C. Fracture toughness, Vickers hardness and elastic properties of these materials were investigated. Post-sintering gave twice the K1c value of transparent pure hydroxyapatite ceramics. Vickers hardness and Young's modulus of the ceramics were increased by post-sintering.