Tribological test was carried out using a pin-on-disc geometry with fabricated SKD11 pin on bearing steel disc, under sliding in paraffin oil. Fabrication has been made with various angles and widths of crosshatch pattern. The effects of geometrical parameters on friction were mainly examined in mixed and elastohydrodynamic lubrication. The result shows that friction control could achieve by fabricating micro-grooved crosshatch pattern on contact surface. It is observed that each geometrical parameter of texture influence on friction, especially decrease of groove aspect ratio and increases of groove sliding length show friction reduction performance. Crucial parameter G l was proposed for micro-grooved crosshatch texture.
Wear and wear transition in silicon carbide ceramics during sliding have been investigated. Three different microstructures, i.e., solid‐state‐sintered silicon carbide, liquidphase‐sintered silicon carbide, and a liquid‐phase‐sintered SiC‐TiB2 composite, were produced by hot pressing. Wear data and examinations of worn surfaces showed that the wear behavior of these silicon carbide ceramics was significantly different. In the solid‐state‐sintered silicon carbide, the wear occurred by a grooving process. In the liqudphase‐sintered silicon carbide and composite, on the other hand, an abrupt transition in the wear mechanism from an initial grooving process to a grain pullout process occurred during the test. The transition occurred significantly earlier in the composite than in the carbide. The different wear behavior in these silicon carbide ceramics is discussed in relation to the grain or interphase boundary strength.
We investigated the long-lasting hydrophilic behavior of a Si-incorporated diamond-like carbon (Si-DLC) film by varying the Si fraction in DLC matrix through oxygen and nitrogen plasma surface treatments. The wetting behavior of the water droplets on the pure DLC and Si-DLC with the nitrogen or oxygen plasma treatment revealed that the Si element in the oxygen-plasma-treated Si-DLC films played a major role in maintaining a hydrophilic wetting angle of <10° for 20 days in ambient air. The nanostructured patterns with a roughness of ∼10 nm evolved because of the selective etching of the carbon matrix by the oxygen plasma in the Si-DLC film, where the chemical component of the Si-Ox bond was enriched on the top of the nanopatterns and remained for over 20 days.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.