International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

This work presents a brief overview of the essence, principles and technological features of reactive electrospark processing (RESP), based on a simple, economical and ecological method – electrospark deposition (ESD), which avoids many of the disadvantages inherent in other existing methods. This treatment can optimize the physicochemical properties of the substrate surface and improve the structure, hardness and wear resistance. The application of RESP technology in surface modification of titanium alloys is considered. Research results, including those of the authors of this work, are presented, which demonstrate the possibilities of RESP for reducing
roughness and surface defects and for the synthesis of new phases and ultrafine structures that are not present in the electrode and substrate. The effect of RESP technology on the wear resistance of titanium and titanium alloys is shown. The main dependences of the quality and properties of the treated surfaces on the process parameters are identified, and ways to form reaction phases, to avoid and remove surface defects and to obtain “in-situ” new intermetallic and wear-resistant compounds are presented. The possibilities and prospects for the use of RESP to improve the surface characteristics and properties of titanium and its alloys are indicated.

System analysis of impact negative bias potential on structure, substructure and mechanical characteristics of single-layer ZrN and multilayer ZrN/TiN coatings that been obtained by vacuum arc evaporation done at article with the aim of development of direction «Structural Engineering of Nitride coatings».

Obtained results have allowed to identify three levels of impact:

– macro- level (phase composition, macrostructure, macrostresses state);

– micro- level (preferred orientation of crystallites – texture);

– nano- level (size of areas of coherent scattering (crystallites), microdeformation).

Superhard state with the magnitude micro-hardness of 44.8 GPa been reached in ZrN/TiN coatings as a result of using Structural Engineering.