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dc.contributor.authorSIDANE, Djahida
dc.contributor.author
 hal.structure.identifier
CHICOT, Didier
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
dc.contributor.authorYALA, Sabeha
dc.contributor.authorZIANI, Salima
dc.contributor.authorKHIREDDINE, Hafit
dc.contributor.author
 hal.structure.identifier
IOST, Alain
211915 Mechanics surfaces and materials processing [MSMP]
dc.contributor.author
 hal.structure.identifier
DECOOPMAN, Xavier
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
dc.date.accessioned2015
dc.date.available2017
dc.date.issued2015
dc.date.submitted2015
dc.identifier.urihttp://hdl.handle.net/10985/10273
dc.description.abstractIn order to reinforce the clinical applications of hydroxyapatite (HAP) sol–gel coatings deposited onto 316 L stainless steel, we suggest the introduction of an intermediate thin layer of titania (TiO2) on the substrate. The titania sub-layer is introduced in order to improve both the corrosion resistance and the mechanical properties of the HAP/316 L stainless steel coated system. The twocoatings, HAP and TiO2,were studied separately and afterwards, compared with the bi-layered coating. A film without any cracks is obtained under the optimum conditions in terms of annealing temperature, dipping rate and aging effect. Microstructural, morphological and profilometry analysis revealed the non-stoichiometric carbonated porous nature of the hydroxyapatite coatings, which were obtained after annealing at 500 °C during 60 min in the atmosphere. The obtained TiO2 coatings exhibit a dense and uniform surface. Addition of TiO2 as sub-layer of the HAP coating tends to increase the homogeneity and the crystallinity rate as compared to the HAP one. The mechanical properties, i.e. hardness and elastic modulus, are determined by means of nanoindentation experiments and the adhesion between the coating and substrate is estimated by scratch tests. The corrosion behavior is evaluated by potentiodynamic cyclic voltammetry tests. As a main result, the values of the elastic modulus and hardness, respectively of 30 GPa and 2.5 GPa, are relatively high for the HAP–TiO2 bilayer coating. This result allows the use of such coated material as a replacement material for hard tissues. The adhesion strength increased from 2925 mN up to 6430 mN after the addition of the TiO2 intermediate film. According to the Tafel's analysis, the 316 L stainless steel specimens coated with both HAP and titania layers (ECorr = −234 mV, lCorr = 0.089 μA cm−2) present a better resistance than the HAP-coated specimens (ECorr= −460 mV, lCorr=0.860 μA cm−2).
dc.language.isoen
dc.publisherELSEVIER
dc.rightsPost-print
dc.subjectHydroxyapatite
dc.subjectTitania
dc.subjectSub-layer
dc.subjectMechanical behavior
dc.subjectCorrosion test
dc.titleStudy of the mechanical behavior and corrosion resistance of hydroxyapatite sol–gel thin coatings on 316 L stainless steel pre-coated with titania film
ensam.embargo.terms2 Years
dc.identifier.doi10.1016/j.tsf.2015.09.037
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Lille
dc.subject.halSciences de l'ingénieur: Matériaux
dc.subject.halSciences de l'ingénieur: Mécanique: Mécanique des matériaux
ensam.audienceInternationale
ensam.page71-80
ensam.journalThin Solid Films
ensam.volume593
hal.statusunsent


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