Microstructure and mechanical properties of hydroxyapatite obtained by gel-casting process

被引：49

作者：

Chen, Biqin ^{[1
]}

Zhang, Tao ^{[1
]}

Zhang, Jingxian ^{[1
]}

Lin, Qingling ^{[1
]}

Jiang, Dongliang ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2008年 / 34卷 / 02期

关键词：

suspensions; mechanical properties; microstructure;

D O I：

10.1016/j.ceramint.2006.10.021

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

In the present work, well-shaped HAp green bodies were obtained by the gel-casting process with 50 vol.% slurry. After drying, the microstructure and pore distribution of the green body were investigated. The density, compressive strength and flexural strength of the green body were 1.621 g/cm(3), 32.6 +/- 3.2 MPa and 13.8 +/- 1.0 MPa, respectively. After pressureless sintering at the range of 1100-1300 degrees C for 2 h, the relative density of the final product ranges from 71.8 to 97.1% th. The maximum value of flexural strength, elastic modulus, hardness and fracture toughness were 84.6 +/- 12.6 MPa, 138 +/- 7 GPa, 4.45 +/- 0.18 GPa and 0.95 +/- 0.13 MPa m(1/2), respectively. SEM images show a compact and uniform microstructure; the average grain size was found by using the linear intercept method. XRD and FTIR determined the phase and the radical preserved after sintering. (c) 2006 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：359 / 364

页数：6

共 27 条

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