Modification of a metal surface with detonation diamond nanoparticles

Friction between metal surfaces in various mechanisms is an actual problem in modern engineering. Friction causes wearing of the rubbing parts. For reducing the coefficient of friction, it is proposed to treat the surfaces of rubbing parts with a suspension having a high (more than 20%) content of ultradispersed detonation diamond (UDD). In the course of treatment, nanodiamond particles penetrate into the substance being treated and create a thin surface layer (up to 1000 nm, depending on the degree of part processing), which leads to smoothing the effect of microsliding, due to which the reduction of the friction coefficient. The resulting surface layer consists of a metal matrix with diamond nanoparticles embedded in it. The paper shows the study of the steel part surface with the use of the optical and X-ray methods, and provides information on the change in the coefficient of friction of steel parts.