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

来源：

International Journal of Automotive and Mechanical Engineering | 2015年 / 12卷

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

页码：3089 / 3096

页数：7

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