Abstract
Hydroxyapatite/carbon nanotubes (HAp/CNTs) nanocomposite was successfully synthesized as a coating on 316L stainless steel (316L SS) by electrodeposition technique. The effects of scanning potential range, scanning rate, number of scans, and synthesis temperature were investigated. Fourier Transform Infrared Spectroscopy (FT-IR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and mechanical test were performed to characterise of the coatings. Suitable condition to synthesize HAp/CNTs/316L SS coatings is a scanning potential range from 0 to -1.65 V/SCE, a scanning rate of 5 mV/s, 5 scans, an electrolyte temperature of 45 oC and a CNTs concentration of 0.5 g/L in the electrolyte solution. At the condition, obtained nanocomposite coatings are composed of HAp and CNTs with the coating thickness is equal to 6.9 µm. The presence of 0.5 g/L of CNTs in the electrolyte solution, the solubility of obtained coatings is lower than that of pure HAp coating. In addition, the hardness of the HAp/CNTs coatings reaches 5.6 GPa, which was nearly 25 % higher than that of pure HAp.
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