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Please use this identifier to cite or link to this item: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/6587

Titre: Parametric study of the mechanical properties of nanocrystalline TiN/CrN multilayer coatings with a special focus on the effect of coating thickness and substrate roughness
Auteur(s): Atmani, Taous Doria
Gaceb, M.
Aknouche, Hamid
Nouveau, C.
Bouamrene, M.S.
Mots-clés: TiN/CrN
Structure
Roughness
Thickness
Interfaces
Adhesion
Issue Date: 2021
Editeur: Elsevier
Collection/Numéro: Surfaces and Interfaces/ Vol.23 (2021);
Résumé: In a plot to improve the performance of steel mechanical parts subject to aggressive friction solicitations, three batches of deposits of TiN and CrN layers on steel substrates with two different roughnesses have been obtained using reactive DC magnetron sputtering. The present study was conducted to determine the effect of varying TiN/CrN multilayer coatings thickness (varying modulated period Λ and interlayer thickness), on their mechanical and tribological properties. The morphological and the structural properties were analyzed using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The nanoindentation measurements displayed improvement in hardness (> 40 GPa) and Young's modulus (> 600 GPa) for the coating with Λ ≅ 12 nm (TiN Λ/2 ≅ 7.5 nm + CrN Λ/2 ≅ 4.5 nm) thickness and the higher number (300) of interfaces, deposited on the rougher substrate. Its low coating damage under the scratch test, associated with its estimated adhesion work (Wad), indicated a good cohesive/adhesive strength and improved structural and mechanical properties
URI: https://www.sciencedirect.com/science/article/abs/pii/S246802302100078X
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/6587
ISSN: 2468-0230
Appears in Collections:Publications Internationales

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