SINTERING EFFECTS ON THE DENSIFICATION OF NANOCRYSTALLINE HYDROXYAPATITE

被引：8
|
作者：
Tolouei, R. [1 ]
Ramesh, S. [2 ]
Tan, C. Y. [1 ]
Amiriyan, M. [1 ]
Teng, W. D. [3 ]
机构：
[1] Univ Tenaga Nas, Ceram Technol Lab, Kajang 43009, Selangor, Malaysia
[2] Univ Malaya, Ctr Adv Mfg & Mat Proc AMMP, Dept Engn Design & Mfg, Fac Engn, Kuala Lumpur 50603, Malaysia
[3] SIRIM Berhad, Ceram Technol Grp, Shah Alam 40911, Selangor, Malaysia
来源：
INTERNATIONAL JOURNAL OF AUTOMOTIVE AND MECHANICAL ENGINEERING | 2011年 / 3卷
关键词：
mechanical properties; bioceramics; hydroxyapatite; sintering;
D O I：
10.15282/ijame.3.2011.2.0021
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effects of sintering profiles on the densification behaviour of synthesized nanocrystalline hydroxyapatite (HA) powder were investigated in terms of phase stability and mechanical properties. A wet chemical precipitation method was successfully employed to synthesize a high purity and single phase HA powder. Green HA compacts were prepared and subjected to sintering in air atmosphere over a temperature range of 700 degrees C to 1300 degrees C. In this study two different holding times were compared, i.e. 1 minute versus the standard 120 minutes. The results revealed that the 1 minute holding time sintering profile was indeed effective in producing a HA body with high density of 98% theoretical when sintered at 1200 degrees C. High mechanical properties such as fracture toughness of 1.41 MPa.m(1/2) and hardness of 9.5 GPa were also measured for HA samples sintered under this profile. Additionally, XRD analysis indicated that decomposition of the HA phase during sintering at high temperatures was suppressed.
引用
收藏
页码：249 / 255
页数：7
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