Elaboration and Characterization of Calcium Phosphate Biomaterial for Biomedical Applications - Biomaterials: Physics and Chemistry - page 372

The preliminary results obtained in this study have shown that the β-TCP-Fap composites
have a potential of further development into an alternative system to produce denser β-TCP
bodies. Further investigations are still under way to investigate the influence of Fap on the
density, microstructure and mechanical properties of β-TCP-Fap biomaterials.
4. Conclusion
Tricalcium phosphate and fluorapatite powder were mixed in order to elaborate biphasic
composites. The influence of Fap substitution on the β-TCP matrix was detected in the
mechanical properties of the sintered composites. The characterization of samples was
investigated by using X-Ray diffraction, differential thermal analysis, scanning electronic
microscopy and by an analysis using 31 P nuclear magnetic resonance. The sintering of
tricalcium phosphate with different percentages of fluorapatite indicates the evolution of the
microstructure, densification and mechanical properties. The Brazilian test was used to
measure the rupture strength of biphasic composites biomaterials. The mechanical
properties increase with the sintered temperature and with fluorapatite additive. The
mechanical resistance of β tricalcium phosphate - 33.16 wt % fluorapatite composites
reached its maximum value (13.7MPa) at 1400°C, whereas the optimum densification was
obtained at 1350°C (93.2%). Above 1400°C, the densification and mechanical properties were
hindered by the tricalcium phosphate allotropic transformation and the formation of both
intragranular porosity and cracks.
5. Acknowledgment
The author thanks the Professor Bouaziz Jamel and Doctor Bouslama Nadhem for their
assistances in this work.
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