Sintering behaviour of natural porous hydroxyapatite derived from bovine bone

The aim of this research is to study the properties of natural porous hydroxyapatite developed from bovine bone through a sintering process. Bovine bone samples were prepared and sintered in an air atmosphere at different temperatures ranging from 600°C to 1000°C. The sintered bodies were characteri...

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Bibliographic Details
Published in:Ceramics international 2015-03, Vol.41 (2), p.3024-3029
Main Authors: Niakan, A., Ramesh, S., Ganesan, P., Tan, C.Y., Purbolaksono, J., Chandran, Hari, Teng, W.D.
Format: Article
Language:English
Subjects:
Biomedical materials
Bones
Bovine HA
Ceramics
Diamond pyramid hardness
Hydroxyapatite
Mechanical properties
Porosity
Porous microstructure
Sintering
Sintering (powder metallurgy)
Surgical implants
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Summary:The aim of this research is to study the properties of natural porous hydroxyapatite developed from bovine bone through a sintering process. Bovine bone samples were prepared and sintered in an air atmosphere at different temperatures ranging from 600°C to 1000°C. The sintered bodies were characterized to determine the phases present, bulk density, Ca/P ratio and Vickers hardness. In addition, the microstructural evolution of the sintered porous bodies was also examined. The results revealed that the thermal stability of the HA matrix was not disrupted and that all of the sintered bodies exhibited phase pure HA. Nevertheless, sintering at 750°C was identified as the optimum temperature to produce a well-defined porous HA body with a relative density of 50% and Vickers hardness of 172MPa. In addition, a natural interconnected porous structure was clearly visible, and the pores were distributed homogeneously throughout the matrix. Uniform pores with a mean size of approximately 152nm and HA grains sizes ranging from 111nm to 248nm were measured, which makes this ceramic suitable for biomedical applications.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2014.10.138