Krzanowski J.E. , ENDRINO ARMENTEROS, JOSÉ LUIS, Nainaparampil J.J. , Zabinski J.S.
Si
J. Mater. Eng. Perform.
Conference Paper
Científica
0.335
0.357
01/01/2004
000223354700009
2-s2.0-4344616859
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°C 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 µPa 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.
Ball-on-disk test; Hard carbide films; Hard coatings; Tribiology; Carbides; Composite materials; Friction; Inorganic coatings; Morphology; Segregation (metallography); Silicon; Silver; Steel; Substrates; Textures; Thin films; Vacuum applications; X ray diffraction; Solid lubricants