Mechanical behavior and oxidation resistance of Cr (Al) N coatings

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dc.contributor.authorSánchez-López, J.C.
dc.contributor.authorMartínez-Martínez, D.
dc.contributor.authorLópez-Cartes, C.
dc.contributor.authorFernández, A.
dc.contributor.authorBrizuela, Marta
dc.contributor.authorGarcía-Luis, A.
dc.contributor.authorOnate, J.I.
dc.contributor.institutionINGENIERÍA DE SUPERFICIES
dc.contributor.institutionTECNOLOGÍAS DE HIDRÓGENO
dc.contributor.institutionTecnalia Research & Innovation
dc.date.issued2005-06-21
dc.description.abstractNanocrystalline chromium nitride and ternary chromium aluminium nitride thin films were deposited by reactive magnetron sputtering of Cr and Al targets in argon/nitrogen atmosphere varying the sputtering power and gas composition. The coatings were characterized in terms of crystal phase, chemical composition, microstructure, and mechanical properties by x-ray diffraction, x-ray photoelectron spectroscopy, including x-ray-induced Auger electron spectroscopy, transmission electron microscopy, selected-area electron diffraction, electron energy-loss spectroscopy, cross-sectional scanning electron microscopy, and ultramicrohardness tester. The incorporation of Al in the composition of the films produces an increase in the mechanical properties (hardness and reduced Young's modulus) and an increased thermal resistance against oxidation in comparison to the pure CrN composition. The hardness behavior was attributed mainly to a reduction of the CrN crystallite size according to a Hall-Petch relationship. The oxidation resistance was evaluated after annealing both types of coatings in air up to 800 degrees C. The oxygen content and the crystallite size appear almost unaltered in the CrAIN in contrast to the pure CrN films where the oxidation and grain growth is very noticeable at 800 degrees C. This improvement in thermal stability in air is explained by the formation of a nanocomposite structure of small CrN crystals embedded in an amorphous aluminum oxide or oxinitride matrix that prevents the CrN phase from crystal growth and further oxidationen
dc.description.statusPeer reviewed
dc.format.extent6
dc.format.extent560324
dc.identifier.citationSánchez-López , J C , Martínez-Martínez , D , López-Cartes , C , Fernández , A , Brizuela , M , García-Luis , A & Onate , J I 2005 , ' Mechanical behavior and oxidation resistance of Cr (Al) N coatings ' , unknown , vol. unknown , no. 4 , pp. 681-686 . https://doi.org/10.1116/1.1946711
dc.identifier.doi10.1116/1.1946711
dc.identifier.otherresearchoutputwizard: 11556/42
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=31144447419&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofunknown
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsHARD COATINGS
dc.subject.keywordsN COATINGS
dc.subject.keywordsTHIN-FILMS
dc.subject.keywordsCR-N
dc.subject.keywordsMICROSTRUCTURE
dc.subject.keywordsCrALN films
dc.subject.keywordsDEPOSITION
dc.subject.keywordsALLOYS
dc.subject.keywordsHARD COATINGS
dc.subject.keywordsN COATINGS
dc.subject.keywordsTHIN-FILMS
dc.subject.keywordsCR-N
dc.subject.keywordsMICROSTRUCTURE
dc.subject.keywordsCrALN films
dc.subject.keywordsDEPOSITION
dc.subject.keywordsALLOYS
dc.subject.keywordsCondensed Matter Physics
dc.subject.keywordsSurfaces and Interfaces
dc.subject.keywordsSurfaces, Coatings and Films
dc.subject.keywordsFunding Info
dc.subject.keywordsSpanish Ministry of Science and Technology (Projects No. MAT2001-1399/C02-01 and /C02-02)
dc.subject.keywordsSpanish Ministry of Science and Technology (Projects No. MAT2001-1399/C02-01 and /C02-02)
dc.titleMechanical behavior and oxidation resistance of Cr (Al) N coatingsen
dc.typejournal article
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