Search academic texts

Information × Registration Number 0223U005528, 0121U108688 , R & D reports Title Physical and technological bases of ion-plasma treatment of structural materials, creation of new functional coatings and study their fundamental properties for use in nuclear power, engineering and medicine popup.stage_title Head Bilous Vitalii A., Доктор технічних наук Registration Date 25-12-2023 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2  The effect of substrate bias pulse potential parameters on the composition, structure, and properties of diamond-like carbon coatings was investigated. A new device with a ring magnet was created, which ensures uniform deposition of coatings on spherical surfaces by focusing plasma flows. A process for depositing multilayer diamond-like carbon coatings on elements of shoulder joint endoprostheses was developed and successfully applied in clinical practice. The mechanisms for reducing the intensity of macroparticle emission from the cathode through the use of inert gas vortex flow and radiation-stimulated diffusion acceleration in the near-surface layer of diamond-like coatings during ion bombardment are theoretically considered, which will increase the deposition rate and improve the quality of coatings. The processes and general principles of nanostructure formation and properties of protective vacuum arc coatings of V-N, Cr-O-N, Ti-N, and Cr-N systems, including those with the addition of Al, Si, Zr, Y, Re, Nb, and Hf, deposited on the substrate at different bias potentials have been studied and revealed. It has been shown that the application of a pulsed bias potential with an amplitude of 0.7-2 kV, a frequency of 10-20 kHz, and a pulse duty cycle of 10-20% allows the optimization of the morphology, composition, crystallite size, texture, and stress level in coatings of different systems, which affects their mechanical properties. The deposition parameters that improve the resistance of coatings to various types of wear and corrosion have been determined. A scheme of a voltage pulse generator on a substrate with parameters optimal for synthesis of high-quality nanostructured single and multilayer coatings is developed. The features of the use of coatings for the protection of surfaces made of steels, zirconium and titanium alloys are discussed. The results obtained serve as a scientific basis for the development of ion-plasma technologies for strengthening and p Product Description popup.authors Ilchenko Oleksandr V. Bilous Vitaliy Arsentiyovich Besedina Yuliya O. Bortnitska Margarita O. Vasyliev Volodymyr Vasyliovich Volkov Yuriy Ya. Hrigorieva Tamila A. Zadniprovskiy Yuriy O. Kalinichenko Oleksandr Ivanovich Klimenko Illya O. Komar Anatoliy A. Koshevy Kostyantyn Ivanovych Kuprin Oleksandr S. Leonov Sergiy O. Luchaninov Oleksandr A. Moskalets Ivan M. Ovcharenko Valeriy D. Petrenko Olena L. Reva Sergiy G. Reshetniak Olena Mykolajivna Strel’nitskij Volodymyr Ye. Tolmachova Galina M. popup.nrat_date 2023-12-25 Close