INNOVATION TECHNOLOGIES FOR WEAR RESISTANCE INCREASE IN HEAVY LOADED TRIBOSYSTEMS BY FORMING THEIR SURFACE LAYER STRUCTURE AND PROPERTIES

The article views fundamentally different scientific approaches to the study and processes control for metallopolymer friction units tribocontacts and, separately, for metal ones. The article presents the developed criteria for the choice of fillers in the composite: for example, in antifriction interfaces, it is a mechanism that forms secondary structures (friction transfer films); in friction interfaces, it is the introduction of reinforcing elements into a polymer composite, that, as a result of friction, can penetrate into the metal counterbody and strengthen it. At the same time, the strength characteristics were evaluated by quantum chemical calculations and experimental confirmation by X-ray electron and Auger electron spectroscopy (AES) data. As for the wear resistance increase in metal-to–metal tribosystems by traditional methods – electric arc metallization, gas-flame coating, detonation-gas, plasma, etc., they do not properly ensure stable operations of tribosystems. Currently, the most promising techniques used for surface modification and hardening are vacuum ion-plasma technologies. The ideas of applying thin-film coatings are based on techniques based on both physical processes (physical vapor deposition with PVD coating) and chemical principles (chemical deposition from the gas phase – CVD process). The PVD- method involves the transfer of the coating material to a vaporous state, followed by its delivery to the sample and vapor deposition on it. When using CVD methods, the coating on the sample is transferred from carbonites, organometallics, etc. The paper presents the results of research for finding the dependence of the physico-mechanical and tribological properties of coatings –PVD, DLC, high-entropy or combined, on the technological parameters of application.

PVD, metal polymer friction units, secondary structures, diffusion, segregation, quantum chemical methods, PVD, DLC (diamond-like coatings) and high-entropy