Reinforcement of Hydroxyapatite Bioceramic by Addition of ZrO2 Coated with Al2O3

The mechanical properties of hydroxyapatite (HAp) bioceramic material were improved significantly by adding tetragonal‐zirconia‐polycrystalline (TZP) powder coated with Al2O3. The coating was done by dispersing the TZP powder in a boehmite suspension and adjusting the pH to cause heterocoagulation....

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Veröffentlicht in:Journal of the American Ceramic Society 1999-11, Vol.82 (11), p.2963-2968
Hauptverfasser: Kong, Young-Min, Kim, Sona, Kim, Hyoun-Ee, Lee, In-Seop
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container_end_page 2968
container_issue 11
container_start_page 2963
container_title Journal of the American Ceramic Society
container_volume 82
creator Kong, Young-Min
Kim, Sona
Kim, Hyoun-Ee
Lee, In-Seop
description The mechanical properties of hydroxyapatite (HAp) bioceramic material were improved significantly by adding tetragonal‐zirconia‐polycrystalline (TZP) powder coated with Al2O3. The coating was done by dispersing the TZP powder in a boehmite suspension and adjusting the pH to cause heterocoagulation. The coating effectively reduced the deleterious reaction between the HAp and the TZP that tended to form tricalcium phosphate (TCP) and fully stabilized cubic zirconia. When 15 vol% zirconia and 30 vol% alumina were added to the HAp by the coating method, the strength and the fracture toughness of the composite were 300 MPa and 3 MPa·m1/2, respectively, which are about 3 times higher than those of pure HAp.
doi_str_mv 10.1111/j.1151-2916.1999.tb02189.x
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source Wiley Online Library Journals Frontfile Complete
subjects Applied sciences
Biological and medical sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Medical sciences
Miscellaneous
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Technical ceramics
Technology. Biomaterials. Equipments
title Reinforcement of Hydroxyapatite Bioceramic by Addition of ZrO2 Coated with Al2O3
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