Effect of Cu content on the tribological performance of Cr-N coatings at high temperatures (840°C)
Demas, N. G.
Polycarpou, A. A.
Gibson, P. N.
PublisherAffiliation: Department of Mechanical and Manufacturing Eng., University of Cyprus, Nicosia, Cyprus
Affiliation: Department of Mechanical Science and Eng., University of Illinois at Urbana-Champaign, Urbana, IL, United States
Affiliation: Institute for Health and Consumer Protection, Joint Res. Centre of the European Commission, Ispra (VA), Italy
Correspondence Address: Polychronopoulou, K.
Department of Mechanical and Manufacturing Eng., University of Cyprus, Nicosia, Cyprus
SourceProceedings of the ASME/STLE International Joint Tribology Conference 2009, IJTC2009
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Cr-N and Cu-Cr-N coatings with Cu content between 3-65 at.%, Cu/Cr ratios in the 0.04-4.5 range and 21-27 at.% N, synthesized by twin e-beam Physical Vapor Deposition (EBPVD) at 450°C, were investigated. Using X-ray photoelectron spectroscopy (XPS), glancing angle X-ray diffraction (GAXRD) and scanning electron microscopy (SEM), in combination with nanoindentation mechanical property measurements and laboratory controlled ball-on-disc sliding experiments, it is shown that Cu-Cr-N coatings with low Cu content (3 at.%) possess sufficient wear resistance for high temperature demanding tribological applications. Copyright © 2009 by ASME.