In the automotive industry, there is an increasing demand to apply self-lubricious coatings to reduce fuel and oil consumption. Within this work, self-lubricious nanocomposite coatings consisting of 1-3.5 nm sized CrC nanocrystals embedded in an amorphous hydrogenated carbon (a-C:H) matrix have been developed in a laboratory-scale sputtering system and up-scaled to a production-type plant. The nanostructure and composition of these coatings are presented and correlated to mechanical and tribological properties. With hardness values of about 11 GPa, dry-sliding friction coefficients between 0.08 and 0.18, and wear rates between 3.9 x 10-16 and 2.8 x 10-15m3/N/m, the coatings outperform present state-of-the-art WC/a-C:H coatings and seem to be excellent candidates for applications in automotive engines and drivetrain systems.
Self-lubricating chromium carbide/amorphous hydrogenated carbon nanocomposite coatings: a new alternative to tungsten carbide/amorphous hydrogenated carbon
2009
7 Seiten, 5 Bilder, 23 Quellen
Aufsatz (Zeitschrift)
Englisch
Antriebstechnik , Automobilindustrie , Chromcarbid , diamantähnlicher Kohlenstoff , Kraftstoffverbrauch , mechanische Eigenschaft , nanokristalliner Verbundwerkstoff , Reibungskoeffizient , Schicht (Belag) , Selbstschmierung , Sputtertechnik , Verschleißeigenschaft , wasserstoffdotierter amorpher Kohlenstoff
Rapid Annealing Of Amorphous Hydrogenated Carbon
NTRS | 1989
|A Comparison of the Tribology of Tetrahedral Amorphous Carbon and Hydrogenated Amorphous Carbon
SAE Technical Papers | 2008
|A comparison of the tribology of tetrahedral amorphous carbon and hydrogenated amorphous carbon
Kraftfahrwesen | 2008
|