An investigation of the microstructural and mechanical properties of tri-calcium phosphates doped with aluminum and fluoride ions

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2011

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Tahmasebifar, Aydin

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The aim of this study was to investigate the microstructure and mechanical properties of pure tricalcium phosphate (TCP) and tricalcium phosphates doped with aluminum (Al3+) and fluoride (F-) ions at different compositions. TCP was synthesized via precipitation method and sintered at 1100C for 1 and 5 h. It was observed that density and relative density of the sintered materials were decreased by extending the sintering time. Increased densities were achieved upon Al3+ and/or F- doping. For structural analysis, XRD, SEM and FTIR spectroscopy examinations were performed. Second phases were observed in XRD studies upon doping. Due to Al3+ and F- substitution, hydroxyapatite (HA) phase was detected besides β-TCP, resulting in the formation of HA/β-TCP biphasic composites with different compositions. SEM results revealed that addition of doping ions resulted in smaller grains. In FTIR analysis, in addition to the characteristic bands of TCP, novel bands indicating the substitution of F- ions were observed in F- ion doped samples. In general, the micro hardness test revealed that Al3+ ions in large amounts had negative effects on the mechanical properties of the samples, while substitution of the F- ions had a positive effect on their mechanical properties.

Subject Keywords

Metallurgy.

URI

http://etd.lib.metu.edu.tr/upload/12613553/index.pdf
https://hdl.handle.net/11511/21014

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Tahmasebifar, “An investigation of the microstructural and mechanical properties of tri-calcium phosphates doped with aluminum and fluoride ions,” M.S. - Master of Science, Middle East Technical University, 2011.