Show simple item record

dc.contributor.authorTLILI, Brahim
dc.contributor.authorMUSTAPHA, Nasri
dc.contributor.authorBENLATRECHE, Yacine
dc.contributor.author
 hal.structure.identifier
GUILLEMOT, Gildas
1158 Centre de Mise en Forme des Matériaux [CEMEF]
dc.contributor.authorLAMBERTIN, Michel
dc.contributor.author
 hal.structure.identifier
NOUVEAU, Corinne
127742 Laboratoire Bourguignon des Matériaux et Procédés [LABOMAP]
dc.date.accessioned2014
dc.date.available2014
dc.date.issued2010
dc.date.submitted2013
dc.identifier.issn0042-207X
dc.identifier.urihttp://hdl.handle.net/10985/8016
dc.description.abstractThe CrAlN coatings are a good alternative to conventional CrN coatings especially for high temperature oxidation-resistance applications. Different CrAlN coatings were deposited on silicon (100) by PVD (Physical vapor deposition) technique from two targets (chromium and aluminum) in a reactive nitrogen atmosphere at aluminum applied negative voltage ( 300, 500, 700 and 900 V). The composition, structural, mechanical and thermal properties of the as-deposited coatings were systematically characterized by energy dispersive analysis of X-rays, X-ray diffraction, nanoindentation, and the ‘‘Mirage effect’’ experiments. The X-ray diffraction (XRD) data show that in general CrAlN coatings were crystallized in the cubic NaCl B1 structure, with the (1 1 1) and (2 0 0) diffraction peaks observed. Two-dimensional surface morphologies of CrAlN coatings were investigated by atomic force microscope (AFM). The results show that with increasing aluminum proportion the coatings became more compact and denser and their increased correspondingly, showing a maximum hardness of about 36 GPa (30 at% of Al) which is higher than that of CrN. Moreover, the results in this work demonstrate that the variation of aluminum fraction alter the resulting columnar grain morphology and porosity of the coatings. However, the thermal properties are greatly affected by these morphological alterations. The correlation between aluminum fraction in CrAlN coatings and its thermal properties revealed that the conductivity and the diffusivity are influenced primarily by size and shape distribution of the pores and secondarily by a decrease of the stitch parameter dimension.
dc.language.isoen
dc.publisherElsevier
dc.rightsPost-print
dc.subjectDensity
dc.subjectResidual stress
dc.subjectConductivity
dc.subjectCrAlN
dc.subjectMicrostructure
dc.titleCorrelation between thermal properties and aluminum fractions in CrAlN layers deposited by PVD technique
dc.identifier.doi10.1016/j.vacuum.2010.01.011
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Cluny
dc.subject.halPhysique: matière Condensée: Science des matériaux
dc.subject.halSciences de l'ingénieur: Matériaux
dc.subject.halSciences de l'ingénieur: Mécanique: Thermique
ensam.audienceInternationale
ensam.page1067-1074
ensam.journalVacuum
ensam.volume84
ensam.issue9
hal.description.errorThe argument 'doi' (value = '10.1016/j.vacuum.2010.01.011') included in the request is allready on HAL
hal.statusunsent


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record