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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

Article dans une revue avec comité de lecture
Author
ATMANI, T.D.
302807 Université M'Hamed Bougara Boumerdes [UMBB]
GACEB, M.
302807 Université M'Hamed Bougara Boumerdes [UMBB]
AKNOUCHE, Hamid
302807 Université M'Hamed Bougara Boumerdes [UMBB]
NOUVEAU, C.
127742 Laboratoire Bourguignon des Matériaux et Procédés [LABOMAP]
BOUAMRENE, M.S.
302807 Université M'Hamed Bougara Boumerdes [UMBB]

URI
http://hdl.handle.net/10985/20257
DOI
10.1016/j.surfin.2021.101001
Date
2021
Journal
Surfaces and Interfaces

Abstract

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.

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