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Friction and Wear Behavior of Multilayer [Al/AlN]n Coatings Deposited on AISI52100 Steel.
- Source :
-
Protection of Metals & Physical Chemistry of Surfaces . May2019, Vol. 55 Issue 3, p527-534. 8p. - Publication Year :
- 2019
-
Abstract
- 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 + N2 discharge. X-ray diffraction analysis indicates a polycrystalline structure of AlN + Al and AlN phases for 35% N2 and 65% N2 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% N2 and 65% N2. 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% N2 fraction presented a lower friction coefficient than those coatings deposited at 65% N2. 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% N2. The wear mechanism for both 35 and 65% N2 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20702051
- Volume :
- 55
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Protection of Metals & Physical Chemistry of Surfaces
- Publication Type :
- Academic Journal
- Accession number :
- 137147263
- Full Text :
- https://doi.org/10.1134/S207020511903002X