The Effect of Bilayer Periods and Their Thickness in Magnetron Sputtering Protective Multilayer Coatings for Tribological Applications
TypeArticles dans des revues avec comité de lecture
CrN/CrAlN thin films were deposited by DC reactive magnetron sputtering. The influence of CrN/CrAlN bilayer thickness on the microstructure, mechanical, and tribological properties was studied. Crystallinity of the layers was characterized by x-ray diffraction. The microstructure of all coatings was observed by scanning electron microscopy. Results exhibit that bilayer thickness was a dominant factor. The analyses showed a columnar microstructure for the CrN/CrAlN coatings. Owing to their denser structure and interfacial strengthening, CrN/CrAlN multilayer coatings exhibited higher mechanical properties than that of monolayers. Indeed, CrN/CrAlN multilayer coating with four bilayers and thickness gradient reaches a maximum of hardness around 43 GPa. Also, its resistance to spallation reaches 97 N which is a very excellent value. After ball-on-disk wear tests, it is found that all multilayer films exhibited a good wear resistance, especially the one with four bilayers and different CrN and CrAlN monolayers thickness. The lowest coefficient of friction is obtained for the coatings with 4 bilayers.
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AOUADI, Khalil; NOUVEAU, Corinne; BESNARD, Aurélien; TLILI, Brahim; MONTAGNE, Alex; CHAFRA, Moez (Springer Nature, 2021)CrAlN films were synthesized by DC reactive magnetron sputtering. The influence of the aluminium content on the microstructure, hardness and the friction coefficient of the CrAlN films have been investigated. Results ...
Effect of substrate bias voltage on the microstructure and tribological properties of CrN coatings AOUADI, Khalil; NOUVEAU, Corinne; BESNARD, Aurélien; TLILI, Brahim; CHAFRA, Moez (Lavoisier, 2016)Microstructure, wear and friction coefficient of cr-based magnetron sputtered layers. CrN films were deposited on stainless steel and silicon substrates via magnetron reactive sputtering under a systematic variation of the ...
Characterization of CrN/CrAlN/Cr2O3 Multilayers Coatings Synthesized by DC Reactive Magnetron Sputtering AOUADI, Khalil; TLILI, Brahim; NOUVEAU, Corinne; BESNARD, Aurélien; CHAFRA, Moez (Springer International Publishing, 2020)The CrN/CrAlN/Cr2O3 multilayer coatings were deposited by reactive magnetron sputtering DC on 90CrMoV8 stainless steel under various oxygen flow rates. The structure and crystalline phases are characterized by the x-ray ...
Influence of Substrate Bias Voltage on Corrosion and Wear Behavior of Physical Vapor Deposition CrN Coatings AOUADI, Khalil; TLILI, Brahim; NOUVEAU, Corinne; BESNARD, Aurélien; CHAFRA, Moez; SOULI, Rania (Springer Verlag - ASM International, 2019)The objective of the present paper is to study the influence of the substrate bias voltage on the microstructure, composition, deposition rate, tribological and corrosion properties of CrN coatings obtained by DC magnetron ...
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