Long-Term Lubricity of Carbon Nanoparticle Coatings on Periodically Laser-Patterned Metallic Surfaces

Abstract The lubricity of coatings made from different types carbon nanoparticles such as onions, nanohorns and nanotubes is investigated on line-patterned AISI 304 stainless-steel substrates using ball-on-disc tribometry over 200,000 sliding cycles. Picosecond direct laser interference patterning used to create line-patterns the substrate surfaces which are subsequently coated by electrophoretic deposition. Friction testing conducted as-processed in linear reciprocal mode at a normal load 100 mN with alumina 100Cr6 counter body materials. resulting wear tracks well scars bodies characterized scanning electron microscopy energy-dispersive X-ray spectroscopy. Tribometry shows that CNTs have ability maintain against both CO CNH sustain their full test duration but fail alumina. In contrast alumina, substantial transfer surface observed.