Journal
MATERIALS CHARACTERIZATION
Volume 61, Issue 8, Pages 786-795Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2010.04.016
Keywords
Electrodeposition; Stoichiometric hydroxyapatite; Hydrogen peroxide; Tricalcium phosphate; Electron microscopy (SEM-STEM)
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Calcium phosphate coatings on Ti6Al4V substrates were elaborated by pulsed electrodeposition with hydrogen peroxide (H2O2) into electrolyte. The surface morphology and the chemical composition of the coatings were characterized by scanning electron microscopy (SEM) associated to Energy Dispersive X-ray Spectroscopy (EDXS) for X-ray microanalysis. The obtained results were systematically confirmed at the nanometre scale analysis using scanning transmission electron microscopy (STEM). Moreover, X-ray diffraction (XRD) was performed in order to identify the coatings phases. The results showed that pulsed electrodeposition without H2O2 into electrolyte followed by heat treatment favoured coatings made of two phases which are stoichiometric hydroxyapatite (HAP) and beta-tricalcium phosphate (beta-TCP). On the other hand the addition of an optimized H2O2 amount into electrolyte led to adherent and uniform coatings mainly made of stoichiometric hydroxyapatite (HAP). (C) 2010 Elsevier Inc. All rights reserved.
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