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Information × Registration Number 0225U001261, (0124U000481) , R & D reports Title Formation and transformation of periodic nanocarbon-containing structures on metal surfaces with short-pulse laser, microwave, and plasma methods popup.stage_title Формування і дослідження ЛІППС та МЛІППС на поверхні нержавіючої сталі. Head Dobrotvorskyi Serhii S., Доктор технічних наук Registration Date 28-01-2025 Organization National Technical University "Kharkiv Polytechnic Institute" popup.description1 The project aims to obtain new fundamental knowledge about the adsorption, mechanical, tribological, and light-repelling properties of metals on the surface of which periodic nanostructures are synthesized by their modification with short-pulse femtosecond and nanosecond laser radiation with implantation of carbon nanoparticles and subsequent stabilization with plasma coatings and microwave processing. popup.description2  A search was made for methods, new tools, and technological parameters for creating periodic surface 3D structures at the nano-, micro-, and macro-levels. A complex multi-stage model was developed using the most modern two-temperature heat transfer theory, which considers the multi-stage process of laser radiation absorption, taking into account the change in absorption coefficients from pulse to pulse, as well as changes in the physicochemical properties of the surface. The model was used to develop and theoretically verify a new hypothesis for forming LIPPS. The hypothesis was tested experimentally, it was found that the formation of microstructures can be influenced by the formation of additional magnetic and electric fields that change the structure of the laser beam propagation medium. New and improved existing laser technologies were developed based on the knowledge obtained to ensure optimal processing conditions and obtain LIPPS with the required properties. For the first time, a series of experiments were conducted on multi-stage surface treatment with the sequential use of nano- and femtosecond lasers. Surfaces with a complex microstructure were formed, which includes elements of the nano-, micro- and macroscale. The results of multi-stage treatment also confirm the stated hypothesis of the formation of the surface microstructure. Using modern equipment, the possibility of practical use of the obtained nano- and microstructures to provide the surfaces of mechanical engineering products with strength, hydrophobic properties, as well as stealth characteristics to reduce the visibility of metal surfaces for radars and rangefinders in the infrared and visible wavelength ranges was studied and confirmed. New fundamental knowledge was obtained, the scientific level was increased, innovative technologies for forming LIPPS on a steel surface were developed, and a comprehensive study of the properties of the obtained surfaces was performed. Product Description popup.authors Aleksenko Borys O. Basov Viktor V. Basova Yevheniia V. Bondar Dmytro V. Hnilitskyi Yaroslav M. Kononenko Serhii M. Popov Viktor V. Prykhodko Vadym O. Trubin Dmytro V. Khavin Hennadii L. Kharchenko Oleksandr S. popup.nrat_date 2025-01-28 Close