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Friction and Wear Behavior of Multilayer [Al/AlN]n Coatings Deposited on AISI52100 Steel
- Source :
- Protection of Metals and Physical Chemistry of Surfaces. 55:527-534
- Publication Year :
- 2019
- Publisher :
- Pleiades Publishing Ltd, 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.
- Subjects :
- Materials science
020209 energy
Organic Chemistry
Abrasive
Metals and Alloys
02 engineering and technology
Nanoindentation
Tribology
Sputter deposition
021001 nanoscience & nanotechnology
Nanocrystalline material
Surfaces, Coatings and Films
Sputtering
0202 electrical engineering, electronic engineering, information engineering
Materials Chemistry
Composite material
0210 nano-technology
Elastic modulus
Tribometer
Subjects
Details
- ISSN :
- 2070206X and 20702051
- Volume :
- 55
- Database :
- OpenAIRE
- Journal :
- Protection of Metals and Physical Chemistry of Surfaces
- Accession number :
- edsair.doi...........5656f961971c48a99e997bea2d419e63