Maksym Bobrov is a PhD candidate and assistant at the Department of Material Science and Technology of Metals at the Admiral Makarov National University of Shipbuilding (NUS). After obtaining his master’s degree with honors at the Institute of Computer Engineering and Technological Sciences and the Department of Material Science and Technology of Metals at NUS in 2011 and his Philosophy Doctor in welding and related technologies in 2016, he worked as postgraduate and research fellow at NUS. He was awarded with second and third places in the competition “Best young scientist NUS” in 2014 and 2019 and won the regional competition of works of young scientists of the Nikolaev region 2019. In 2016, he received the Cabinet of Ministers of Ukraine scholarship for young scientists. Maksym has pedagogical experience in teaching lectures and laboratory training and has published more than 60 publications, among them 13 scientific articles, 30 theses of reports at international conferences and 7 patents.
Presenting about:
Improving Physical and Mechanical Properties of Thermal Sprayed Coatings by Electropulse Action and Formation of Composite Coatings
Abstract: The optimum amplitude and frequency parameters of electric pulse action at electric arc spraying of steel wire and bronze powder plasma spraying were determined, which provide increased hardness (up to 35 %), density, bond strength (to 30 %) and the wear resistance of the coatings (1.5…1.7) by decreasing size and accelerating sprayed particles. The work also studies the possibility of forming composite metal-glass, metal-ceramic and metal-carbide electric arc sprayed coatings using a hardening phase. For this, a modernized electric arc spray gun was used, equipped with a unit for continuous powder feed supply. Microstructures of the deposited coatings are investigated using a scanning electron microscope. The influence of the technological parameters of spraying, namely: current, voltage and powder consumption on the content of the hardening phase in the structure of the composite electric arc coatings has been investigated. Experimental studies of the influence of the content of the strengthening phase in composite coatings on their bond strength to the substrate have been carried out.