Deposition and characterization of a sol-gel Mg-substituted fluorapatite coating with new stoichiometries
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Applied Surface Science
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The calcium substitution for magnesium on fluorapatite is attractive because this element is a natural substitute
in biological apatites. There are several published stoichiometries for calcium substituted by magnesium
fluorapatites and most works point out that the formation and fixation of biomimetic Ca-P coatings in Ringer’s
solution were strongly related to Mg2+ content and furthermore the Mg replacement improves the bioactivity of
apatite. In the present study, fluorapatite (FA) and fluorapatite substituted with 6% and 7% of magnesium were
obtained by deposition via sol-gel coating on substrates of AISI 316L stainless steel to investigate the effect of
magnesium substitution on fluorapatite with not yet investigated stoichiometry. Characterization of coating
thickness, chemical composition and crystalline structure was performed using scanning electron microscopy
(SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The coating adhesion was evaluated
using the pull-out test and the corrosion resistance was undertaken using potentiodynamic polarization and
electrochemical impedance spectroscopy (EIS). The electrochemical results showed improvement in the corrosion
resistance of magnesium-fluorapatite compared to fluorapatite coated on AISI 316L stainless steel substrates.
The improvement corrosion protection and adhesion performance indicate that such magnesium fluorapatites
coatings are very interesting candidates as bioactive coatings for implants.
Como referenciar
FERREIRA JUNIOR, J.M.; RAJENDRAN, V.; SIMONELLI, G.; SILVA, A.C.M.; SANTOS, L.C.L.; MATTEDI, S.; PONTES, L.A.M.; COSTA, I.; ROSSI, J.L.; BAKER, M.A. Deposition and characterization of a sol-gel Mg-substituted fluorapatite coating with new stoichiometries. Applied Surface Science, v. 505, p. 1-13, 2020. DOI: 10.1016/j.apsusc.2019.144393. Disponível em: http://repositorio.ipen.br/handle/123456789/31080. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.