Title of the article

ABOUT THE ROLE OF GRAPHENE-LIKE CARBON IN THE FORMATION OF COATINGS BY THE METHOD OF MICROARC OXIDATION

Authors

KOMAROV Alexander I., Ph. D. in Eng., Head of the Laboratory of Modification Techniques of Structural Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ZOLOTAYA Polina S., Junior Researcher, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

GORBACHUK Nikolay I., Ph. D. in Phys. and Math., Associate Professor of the Department of Physics of Semiconductors and Nano-Electronics, Belarusian State University, Minsk, Republic of Belarus

In the section MATERIALS SCIENCE IN MECHANICAL ENGINEERING
Year 2020 Issue 1 Pages 72–76
Type of article RAR Index UDK 621.794.61 Index BBK  
Abstract

Based on the provisions of the discharge percolation theory, an interpretation is given for the mechanism of the effect of carbon nanoparticles introduced into the electrolyte on the microarc oxidation process. The effect of graphene-like carbon particles (GC) on the main characteristics of the formed coating is studied using the D16 alloy as an example. It is established that GC introduced in silicate-alkaline electrolytes at a concentration of 250–1000 mg/l intensifies microplasma processes, which is directly evidenced by an increase in the coating thickness by 1.3–2.2 times. At the same time, the participation of graphene particles in the process of coating formation leads to an increase in the content of corundum in it and, as a result, to an increase in microhardness up to 25 GPa relative to 15 GPa for unmodified coatings.

Keywords

microarc oxidation, modification, aluminum alloys, graphene, shungite, phase composition, microhardness

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