Suranov A. Improving the lubricity of industrial oils through the use of graphite evaporation products

The thesis is aimed at improving the anti-friction and anti-wear properties of industrial oils by adding carbon soot, which contains micro- and carbon nanoparticles obtained by the method of graphite evaporation, and establishing patterns of influence of carbon soot concentration on friction and wear characteristics in the tsb systems. It has been established that when micro-nanoparticles are added to industrial oils, the mechanism of wear of sliding parts has a dual nature and consists of mechanical and abrasive wear. The sum of the wear rates of both types made it possible to establish a rational value of the concentration of carbon nanoparticles. The paper developed a mathematical model that reveals the mechanism of physical adsorption of carbon particles, which are polarized under the action of the force field of the friction surface and acquire an electric dipole moment. The solution of the micro and nanoparticles carbon obtained in the work under the action of a force field showed that the time of adsorption of micro and carbon nanoparticles is 2-3 orders of magnitude shorter than for individual oil molecules. That is, the mechanism of interaction of micro- and nanoparticles of carbon with friction surfaces proceeds in three stages: electrification of the particle, formation of a solvation shell around the particle and its primary adsorption on the metal surface. Considering the obtained calculated data, micro- and nanoparticles of carbon are concentrators and transporters of surface-active substances on the friction surface, which contributes to an increase in the thickness of the boundary film. A technique has been developed for introducing carbon soot into industrial oils, which takes into account the value of a rational concentration of carbon soot according to the criterion of minimum friction and wear in machine tribosystems.