Mechanical properties of hydroxyapatite ceramics sintered from powders with different morphologies

Jiangfeng Song; Yong Liu; Ying Zhang; Lei Jiao

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Mechanical properties of hydroxyapatite ceramics sintered from powders with different morphologies

机译：不同形貌粉末烧结的羟基磷灰石陶瓷的力学性能

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In the present work, hydroxyapatite (HA) nanorods and submicron prisms were synthesized by using PVP (polyvinylpyrrolidone) and CTAB (cetyltrimethylammonium) as templates respectively, and then sintered at 1150-1250℃. The mechanical properties of as-sintered ceramics were studied. The results show that the HA ceramics sintered from prism-like powders have a Vickers hardness of ~5.11 GPa, a transverse rupture strength of ~106.26MPa, and a fracture toughness of ~1.24MPam½, which are close to those properties of natural teeth. Moreover, it reveals that HA ceramics sintered from prism-like powders exhibit a higher density and mechanical properties than that sintered from HA nanorods, owing to the less agglomeration of raw powders and lower mass loss during the sintering process.

机译：本文以聚乙烯吡咯烷酮（PVP）和鲸蜡基三甲基铵（CTAB）为模板分别合成羟基磷灰石（HA）纳米棒和亚微米棱晶，然后在1150-1250℃下烧结。研究了烧结态陶瓷的力学性能。结果表明，用棱柱状粉末烧结的HA陶瓷的维氏硬度约为5.11 GPa，横向断裂强度约为106.26MPa，断裂韧性约为1.24MPam1 / 2，与天然牙齿的性能接近。此外，它揭示了由棱柱状粉末烧结的HA陶瓷比从HA纳米棒烧结的HA陶瓷具有更高的密度和机械性能，这是由于在烧结过程中生粉的团聚较少且质量损失较低。

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来源
《Materials Science and Engineering》 |2011年第17期|p.5421-5427|共7页
作者
Jiangfeng Song; Yong Liu; Ying Zhang; Lei Jiao;
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作者单位

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;

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正文语种 eng
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关键词
mechanical properties; hydroxyapatite ceramics; morphology; pressureless sintering;

机译：力学性能;羟基磷灰石陶瓷;形貌;无压烧结;

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Mechanical properties of hydroxyapatite ceramics sintered from powders with different morphologies

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