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dc.contributor.authorDominguez-Meister, S.
dc.contributor.authorEl Mrabet, S.
dc.contributor.authorEscobar-Galindo, R.
dc.contributor.authorMariscal, A.
dc.contributor.authorJimenez de Haro, C.
dc.contributor.authorJusto, A.
dc.contributor.authorBrizuela, Marta
dc.contributor.authorRojas, T.C.
dc.contributor.authorSánchez-López, J.C.
dc.date.accessioned2016-04-06T14:33:10Z
dc.date.available2016-04-06T14:33:10Z
dc.date.issued2015-10-30
dc.identifier.citationAPPLIED SURFACE SCIENCE, Vol. 353, 2015, pp. 504-511en
dc.identifier.issn1873-5584en
dc.identifier.urihttp://hdl.handle.net/11556/179
dc.description.abstractCrAlYN coatings with different aluminum (4-12 at.%) and yttrium (2-5 at.%) contents are deposited by d.c. reactive magnetron sputtering on silicon and M2 steel substrates using metallic targets and Ar/N-2 mixtures. The influence of the nanostructure and chemical elemental distribution on the oxidation resistance after heating in air at 1000 degrees C is studied by means of cross-sectional scanning electron microscopy (X-SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD) and glow discharge optical emission spectroscopy (GD-OES). The sequential exposure to the metallic targets during the synthesis leads to a multilayer structure where concentration of metallic elements (Cr, Al and Y) is changing periodically. A good oxidation resistance is observed when Al- and Y-rich regions are separated by well-defined CrN layers, maintaining crystalline coherence along the columnar structure. This protective behavior is independent of the type of substrate and corresponds to the formation of a thin mixed (Al, Cr)-oxide scale that protects the film underneath. The GD-OES and XRD analysis have demonstrated that Y acts as a reactive element, blocking the Fe and C atoms diffusion from the steel and favoring higher Al/Cr ratio in the passivation layer after heating. The coating with Y content around 4 at.% exhibited the best performance with a thinner oxide scale, a delay in the CrN decomposition and transformation to Cr2N, and a more effective Fe and C blocking.en
dc.description.sponsorshipMINECO: MAT2007-66881 MAT2010-21597 MAT2011-29074 Consolider FUNCOAT CSD2008-00023. Junta de Andalucia :TEP217. I3P programme of CSICen
dc.language.isoengen
dc.publisherELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSen
dc.titleRole of Y in the oxidation resistance of CrAlYN coatingsen
dc.typearticleen
dc.identifier.doi10.1016/j.apsusc.2015.06.099en
dc.isiYesen
dc.rights.accessRightsembargoedAccessen
dc.subject.keywordsCrAlNen
dc.subject.keywordsMagnetron sputteringen
dc.subject.keywordsOxidation resistanceen
dc.subject.keywordsMechanismen
dc.subject.keywordsYttriumen


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