Micro-tribological performance of fullerene-like carbon and carbon-nitride surfaces

Abstract

We studied the microtribological behavior of amorphous and fullerene-like (FL) carbon and carbon-nitride coatings deposited by filtered-cathodic-arc. All films show similar friction coefficients but different wear mechanisms. The FL films exhibit a surface swelling with the formation of a layer that thickens during the test, limiting wear and maintaining a low friction. X-ray photoelectron spectroscopy on worn FL film surfaces show an increase in the sp 2-content, indicating that the lubricious layer generated by the wear process is probably the result of re-hybridization due to plasticity induced by localized shear. In contrast, the wear results of the amorphous films, involving tribomechanical and tribochemical surface phenomena, show that the surface layer formed during sliding is a precursor to the onset of wear.

The Effect of CN Coatings Doped with Niobium, Titanium and Zirconium Metal on Mechanical, Tribological and Corrosion Resistance Properties of Thin Films

“…CN coatings are similar to other carbon-contained coatings in that they have various structures, such as β-C3N4 [1], fullerene-like structures [4], graphite-like carbon (GLC) [5], diamond-like carbon (DLC) [6] and amorphous structures [7]. Different combinations of sputtering conditions produce these different structures, which have different properties.…”