Premium
Elaboration of Monophasic and Biphasic Calcium Phosphate Coatings on Ti6Al4V Substrate by Pulsed Electrodeposition Current
Author(s) -
Benhayoune Hicham,
Drevet Richard,
Fauré Joel,
Potiron Sylvain,
Gloriant Thierry,
Oudadesse Hassane,
LaurentMaquin Dominique
Publication year - 2010
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200980058
Subject(s) - materials science , coating , electrolyte , corrosion , nanometre , titanium , stoichiometry , electrochemistry , chemical engineering , metallurgy , substrate (aquarium) , phosphate , calcium , composite material , electrode , chemistry , oceanography , organic chemistry , engineering , geology
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.