Advanced Engineering Materials · 2010 · 30 citations · 41 references
Natural SciencesMaterials EngineeringMaterials ScienceCorrosion ScienceElectrochemical EngineeringSurface ScienceCalcium Phosphate MaterialsCoatingsElectrochemical CorrosionElectrode MaterialsBeta-tricalcium PhosphateBiphasic Calcium Phosphate MaterialsCalcium Phosphate CoatingsElectrode CoatingsElectrodeposited CoatingsElectrodepositionHydroxyapatiteTricalcium Phosphate
Abstract Calcium phosphate coatings on Ti6Al4V substrates are elaborated by pulsed electrodeposition. The surface morphology and chemical composition of the coatings are characterized by SEM–EDS. The obtained results are systematically confirmed at the nanometre scale using TEM. Moreover, XRD is performed in order to identify the coatings phases. The results show that pulsed electrodeposition allows uniform coatings to be obtained without the holes and craters usually observed with classical electrodeposition. After appropriate heat treatment, these coatings have a biphasic composition of stoichiometric hydroxyapatite and β ‐tricalcium phosphate. Moreover, the addition of 9% H 2 O 2 to the electrolyte leads to monophasic coatings made of stoichiometric hydroxyapatite. As an indication of the passive nature of the electrodeposited coating, electrochemical potentiodynamic tests are performed in physiological solution in order to determine the corrosion behaviour of these coatings.
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