Micrometer level structural and chemical evaluation of electrodeposited calcium phosphate coatings on TA6V substrate by STEM-EDXS.
Hydroxyapatite (HA) coatings on titanium alloy substrates Ti6Al4V have been prepared in our laboratory by electrodeposition and hydrothermal synthesis. In this paper, the morphology, crystal size, porosity and Ca/P atomic ratio are investigated using scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), Raman microspectroscopy and X-ray energy dispersive spectroscopy (EDXS). The results obtained show that after being hydrothermally treated and calcined at high temperature, the electrodeposited brushite coating is converted into a stoichiometric hydroxyapatite having a crystal size which changes considerably from the surface to the substrate alloy. In addition, variation of the surface coating porosity as a function of the electrolyte temperature has also been carried out.
Benhayoune
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H
INSERM-ERM 0203, Laboratoire de Microscopie Electronique, 21, rue Clément Ader, 51685 Reims BP 138 Cedex 02, France.
Laquerriere
P
P
Jallot
E
E
Perchet
A
A
Kilian
L
L
Balossier
G
G
Bubendorff
J L
JL
Sockalingum
G D
GD