Sintering and properties of dense manganese-doped calcium phosphate bioceramics prepared using sol-gel derived nanopowders

Sopyan, I. and Nawawi, N.A. and Shah, Q.H. and Ramesh, S. and Tan, C.Y. and Abd Shukor, Mohd Hamdi (2011) Sintering and properties of dense manganese-doped calcium phosphate bioceramics prepared using sol-gel derived nanopowders. Materials and Manufacturing Processes, 26 (7). pp. 908-914. ISSN 1042-6914,

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Dense manganese-doped biphasic calcium phosphate (Mn-BCP) ceramics were fabricated via uniaxial pressing using the sol-gel derived powders. The compacted discs were sintered in ambient atmosphere with temperatures ranging from 800 degrees C to 1400 degrees C. Manganese (Mn) level was varied in the range of 0.6, 1.9, 4.3, and 11.9mol, and its effect on physical and mechanical properties of the dense samples were investigated. All dense samples have been proved to show HA and beta-TCP phases only. Mn doping has shifted the onset of the sintering temperature of the BCP, leading to the improved densification of BCP ceramics. The relative density also increased with sintering temperature. Considerable grain growth has been observed for Mn-doped BCP samples when compared to the undoped BCP. Furthermore, 11.9mol Mn-doped BCP dense samples showed the maximum hardness of 6.66GPa compared to 2.89 GPa for the undoped BCP. The incorporation of Mn was also found to be beneficial in enhancing the fracture toughness of BCP throughout the temperature range employed. This study has shown that Mn doping was effective in improving the sintering properties of BCP without affecting the phase stability.

Item Type: Article
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Uncontrolled Keywords: Biomaterials ceramics characterization dopant manganese mechanical nanomaterials tricalcium phosphate nanocrystalline hydroxyapatite porous hydroxyapatite biomedical applications densification behavior mechanical-properties oxide temperature atmosphere additives
Subjects: T Technology > TS Manufactures
Divisions: Faculty of Engineering
Depositing User: Mr. Mohammed Salim Abd Rahman
Date Deposited: 08 Jul 2013 04:45
Last Modified: 01 Oct 2021 03:55

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