Friction Property of Plasma Sprayed Coatings Incorporating Nano-Sized Carbon Particles

摘要

Nanodiamond (ND) powders with characteristic particle size of less than 10 nm were sprayed on stainless steel substrates using a novel plasma spraying process, electromagnetically accelerated plasma spraying (EMAPS). High temperature existing in plasma caused transformation of ND to mainly onion-like carbon. Pin-on-disc dry friction tests showed that synthesized coatings possess low coefficient of friction under ambient air and high vacuum conditions. Mixtures of copper and ND (2-5 wt.) were sprayed by EMAPS. It was found that small additives of ND change structure of the coatings and influence coefficient of friction in air and high vacuum.