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Fabrication of Dense Hydroxyapatite Nanobioceramics with Enhanced Mechanical Properties via Two‐Step Sintering Process

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Fully dense hydroxyapatite (HAp) nanobioceramics with enhanced mechanical properties were fabricated via two‐step sintering (TSS) process. The effects of sintering parameters on the microstructures and mechanical properties of HAp bioceramics were investigated. The results showed that the grain growth could be effectively suppressed via TSS and the grain size was 193 nm for the samples with 99.02% relative density. Comparing with conventional sintering process, the hardness (4.86 GPa) and fracture toughness (1.18 MPa m1/2) of the dense samples fabricated by TSS were increased about 12% and 57%, respectively. Therefore, TSS provided a facile method to fabricate fully dense HAp nanobioceramics with enhanced mechanical properties.
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Document Type: Research Article

Affiliations: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, People's Republic of China

Publication date: 2012-05-01

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