Friction and Wear Behavior of Multilayer [Al/AlN]n Coatings Deposited on AISI52100 Steel

In this study, a set of multilayer hard nanocrystalline coatings of Al/AlN with 35, 55 and 75 bilayer were prepared by DC magnetron sputtering on AISI 52100 steel specimens at nitrogen fractions of 35 and 65% in the Ar + N 2 discharge. X-ray diffraction analysis indicates a polycrystalline structure...

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Bibliographic Details
Published in:Protection of metals and physical chemistry of surfaces 2019, Vol.55 (3), p.527-534
Main Authors: Eduardo Alfaro-Pérez, Chiñas-Castillo, Fernando, Flores-Ruiz, Francisco J., Alavez-Ramirez, Rafael, Caballero-Caballero, Magdaleno, Lara-Romero, Javier
Format: Article
Language:English
Subjects:
Abrasive wear
Adhesive wear
Aluminum nitride
Bearing steels
Bilayers
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromium steels
Coatings
Coefficient of friction
Corrosion and Coatings
Friction
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Magnetron sputtering
Materials
Materials Science
Metallic Materials
Modulus of elasticity
Multilayers
Nanoindentation
New Substances
Plastic flow
Tribology
Wear mechanisms
Wear rate
X-ray diffraction
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Summary:In this study, a set of multilayer hard nanocrystalline coatings of Al/AlN with 35, 55 and 75 bilayer were prepared by DC magnetron sputtering on AISI 52100 steel specimens at nitrogen fractions of 35 and 65% in the Ar + N 2 discharge. X-ray diffraction analysis indicates a polycrystalline structure of AlN + Al and AlN phases for 35% N 2 and 65% N 2 fraction, respectively. Nanoindentation tests showed hardness values from 11 to 19 GPa and elastic modulus of ~200 GPa almost independent of the bilayer number for both, 35% N 2 and 65% N 2 . Tribological tests evaluated with a CSM pin-on-disk tribometer showed a reduction in the wear rate compared to AISI 52100 steel specimens. Multilayer coatings deposited at 35% N 2 fraction presented a lower friction coefficient than those coatings deposited at 65% N 2 . The origin of such a decrease in the coefficient of friction was associated with the presence of the Al phase in the coatings deposited at 35% N 2 . The wear mechanism for both 35 and 65% N 2 were different. For the first case, the wear is controlled by plastic flow and abrasive wear, while in the second case, is dominated by adhesive wear.
ISSN:2070-2051
2070-206X
DOI:10.1134/S207020511903002X