Tribological testing of DLC coatings for automotive applications
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Tribologiska tester av DLC-beläggningar för motorapplikationer (Swedish)
In this work, the friction and wear behavior of three DLC coatings was evaluated in various conventional and alternative fuels as well as in commercially available formulated engine oils and additive-free synthetic oil. The first DLC has a thin top-coating of hydrogenated amorphous carbon (a-C:H), the second consists of Si-doped DLC (a-C:H:Si) and the third is a W-doped multilayered structure of a-C:H and a-C:H:W.
The tribological tests were performed using a ball-on-flat reciprocating rig at low contact pressures. Methods such as white light interferometry (VSI), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS), Raman spectroscopy, transmission electron spectroscopy (TEM) and electron spectroscopy for chemical analysis (ESCA/XPS) were used for analyzing and characterizing the coatings and counter surfaces in an effort to gain an understanding of the tribological mechanisms involved.
Place, publisher, year, edition, pages
2012. , 51 p.
UPTEC K, ISSN 1650-8297 ; 12010
DLC, wear, friction, tribology, diamond-like carbon, automotive, engine oils, fuels
Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-177355OAI: oai:DiVA.org:uu-177355DiVA: diva2:540693
Master Programme in Chemical Engineering
Gustavsson, FredrikForsberg, Peter
Jacobsson, StaffanBerger, Rolf