Influence of powder morphology and sintering temperature on the properties of hydroxyapatite

被引:0
作者
Kelvin Chew, W.J. [1 ]
Niakan, A. [2 ]
Nawawi, N.A. [2 ]
Bang, L.T. [2 ]
Ramesh, S. [2 ]
机构
[1] School of Engineering, Taylor's University, Taylor's Lakeside Campus, No. 1 Jalan Taylor's, Subang Jaya
[2] Center of Advanced Manufacturing and Material Processing, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur
关键词
Bioceramics; Decomposition; Hydroxyapatite (HA); Morphology;
D O I
10.15282/IJAME.12.2015.22.0257
中图分类号
学科分类号
摘要
The effect of sintering two hydroxyapatite (HA) powders (designated HAC and HAS) of contrasting morphology, at temperatures ranging from 1000°C to 1450°C, on the phase stability of the material was investigated. Pellets were prepared by cold isostatic pressing of the powders at 200 MPa and subsequently sintering in air at a heating rate of 2°C/min. and a holding time of 2 hours. X-ray diffraction analysis revealed that decomposition of the HA was dependent on the morphology of the precursor powders. The decomposition of the HAS powder started to occur at a lower sintering temperature of 1300°C, whereas the HAC powder only decomposes at 1400°C. Both powders formed residual phases of tri-calcium phosphates and tetra-calcium phosphate due to decomposition. The possible factors controlling the decomposition mechanism of the HA powders are also discussed. © Universiti Malaysia Pahang.
引用
收藏
页码:3089 / 3096
页数:7
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