Composite coatings incorporating solid lubricant phases
Abstract
The concept of incorporating a solid lubricant, silver (Ag), within a hard carbide film for vacuum tribology applications is investigated in this paper. SiC/Ag and HfC/Ag films were deposited by magnetron cosputtering at 200 degreesC onto Si and 440C steel substrates. The composition, phase structure, and morphology in these films was examined using x-ray diffraction, scanning electron microscopy, and x-ray photoelectron spectroscopy. The microstructural analysis showed that Ag was incorporated both within and on the surface of the films. There was a strong tendency for Ag to segregate to the film surface. Vacuum tribology tests were conducted using a ball-on-disk test in a vacuum of 1.33 muPa with a 1 N load for 10 000 cycles. For both the SiC/Ag and HfC/Ag films, the average friction coefficients were reduced when sufficient Ag was present. These tests show that carbide-Ag composite films hold promise for vacuum tribology applications.
Department
Mechanical Engineering
Publication Date
8-1-2004
Journal Title
Journal of Materials Engineering and Performance
Publisher
SPRINGER
Digital Object Identifier (DOI)
10.1361/10599490419928
Document Type
Article
Recommended Citation
Krzanowski, James E.; Endrino, J. L.; Nainaparampil, J. J.; and Zabinski, J. S., "Composite coatings incorporating solid lubricant phases" (2004). Journal of Materials Engineering and Performance. 14.
https://scholars.unh.edu/mecheng_facpub/14
Rights
Copyright 2004 ASM International.