Fabrication of Dense Hydroxyapatite Nanobioceramics with Enhanced Mechanical Properties via Two-Step Sintering Process
Fabrication of Dense Hydroxyapatite Nanobioceramics with Enhanced Mechanical Properties via Two-Step Sintering Process
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DOI：
10.1111/j.1744-7402.2011.02654.x
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发表时间：
2012-05-01
影响因子：
2.1
通讯作者：
Chang, Jiang
中科院分区：
文献类型：
--
作者：
Lin, Kaili;Chen, Lei;Chang, Jiang
采用两步烧结（TSS）法制备了力学性能增强的全致密羟基磷灰石（HAp）纳米陶瓷。研究了烧结参数对羟基磷灰石生物陶瓷微观结构和力学性能的影响。结果表明：在相对密度为99.02%时，TSS能有效抑制晶粒长大，晶粒尺寸达到193 nm；与常规烧结工艺相比，TSS烧结致密试样的硬度（4.86 GPa）和断裂韧性（1.18 MPa m1/2）分别提高了约12%和57%。因此，TSS提供了一种简单的方法来制备具有增强力学性能的全致密HAp纳米陶瓷。
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.