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Structural, mechanical and tribological properties of AlxCr1-xN coatings

Article dans une revue avec comité de lecture
Author
BENLATRECHE, Yacine
AKNOUCHE, Hamid
MARCHAL, Rémy
NOUVEAU, Corinne
127742 Laboratoire Bourguignon des Matériaux et Procédés [LABOMAP]

URI
http://hdl.handle.net/10985/7631
DOI
10.3166/acsm.33.supp1.189-197
Date
2008
Journal
Annales de Chimie - Science des Matériaux

Abstract

The aim of this study was to check the influence of Al content into CrN films on their properties. CrAlN films were deposited by reactive magnetron sputtering using chromium and aluminum pure targets. The atomic content of aluminum in CrAlN films was varied from 0 to 51 at. %. It was found that the addition of Al improved the stoichiometry and the structural properties of the films. Indeed, CrAlN morphology was changed from amorphous to columnar structure. The CrAlN films present compressive residual stresses from -1.1 to -3.58 GPa. The maximum value of stress was obtained at 30 at.% of aluminum content in the films. The coatings showed a high hardness and Young's modulus, which varied between 15-36 GPA and 331-520 GPa respectively. The friction coefficient of the CrAlN films varied from 0.55 to 0.7. All the CrAlN films showed a high friction and a high wear resistance as we observed parts of the pin-on-disk ball on their surface.

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