Effect of Nanodiamond Particles Incorporation in Hydroxyapatite Coatings
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Abstract
Nanodiamond particles (ND, 4-6 nm in size) were added to a
simulated body fluid (SBF) and electrodeposition (ED) at
biological conditions (370C, pH 7.4) was performed on Ti surfaces.
The novelty in this work was the addition of the ND particles to
the SBF solution used as the electrolyte for the ED of biomimetic
HA. The results from Fourier transform infrared spectroscopy
(FTIR), scanning electron microscopy (SEM), coupled with energy
dispersive X-ray (EDX) spectroscopy revealed that the Ti surface
was covered by white, dense and homogeneous HA layer. X-ray
photoelectron spectra (XPS) confirmed the formation of calcium
phosphate, calcium carbonate, calcium oxide and hydrated surface
layer. The ND particles incorporation yielded increased Vickers
hardness of the HA. No cracks were observed in the SEM images
of the HA-ND layer, which testifies for its ductility and good
residual stress