Перегляд за Автор "Dudnik, S."

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    Application of Avinit vacuum plasma technologies Avinit to the manufacture of high-precision full-size gears
    (Igor Sikorsky Kyiv Polytechnic Institute, 2021) Sagalovych, A.; Popov, V.; Sagalovych, V.; Dudnik, S.; Edinovych, A.
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    Development of Avinit duplex technology to increase the wear resistance of the gearbox separator
    (Igor Sikorsky Kyiv Polytechnic Institute, 2020) Sagalovych, A.; Popov, V.; Sagalovych, V.; Dudnik, S.; Edinovych, A.; Stupakov, A.
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    Plasma-chemical synthesis of carbide-based vacuum-plasma functional coatings and study of tribological characteristics of friction pairs
    (Igor Sikorsky Kyiv Polytechnic Institute, 2024) Sagalovych, O.; Popov, V.; Sagalovych, V.; Dudnik, S.; Oliinyk, O.
    The work is devoted to the search for new materials with high functional characteristics using the Avinit vacuum-plasma technologies developed by us, based on the complex use of coating methods (plasma-chemical CVD, vacuum-plasma PVD (vacuumarc, magnetron), processes of ion saturation and ion surface treatment), stimulated by non-equilibrium low-temperature plasma. Processes of controlled plasma-chemical synthesis of the formation of multicomponent coatings in “metal-carbon” systems – Avinit coating (TiC, MoC) using vacuum-arc sources of ionized atomic fluxes of titanium and molybdenum in an argon-benzene plasma environment were developed and their characteristics were studied depending on their conditions formation. Metallographic studies confirm the possibility of low-temperature application of high-quality wear-resistant high-hard “metal-carbon” coatings with a hardness of 18,000–30,000 MPa, while ensuring good adhesion to the substrate materials (steel DIN 1.2379) without reducing strength and without deteriorating the cleanliness class of the original surface. The conducted tribological tests using the “cube-roller” scheme reveal high tribological characteristics of steel DIN 1.2379 tribopairs with developed coatings and testify to the promisingness of the developed multi-component multilayer coatings Avinit (Ti-C, MoS) for increasing wear resistance and reducing the coefficient of sliding friction in friction nodes. The developed plasma-chemical vacuum-plasma coatings are applied to mock-up samples of the working compressor blades of the GTE of aircraft engines. Proven modes allow to get high-quality, uniform coatings with high adhesion. This gives reason to consider the developed process as an alternative for expanding the range of new Avinit vacuum-plasma erosionresistant coatings and developing structures of anti-friction wear-resistant coatings to increase the performance of friction pairs in “coating-steel” and “coating-coating” systems.
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    Vacuum plasma erosion resistant 2D nanocomposite coating Avinit for compressor blades of gas turbine engines of aircraft engines
    (Igor Sikorsky Kyiv Polytechnic Institute, 2023) Sagalovych, A.; Popov, V.; Kononyhin, A.; Sagalovych, V.; Dudnik, S.; Prokopenko, A.
    The work is devoted to the search for new vacuum-plasma coatings with high hardness to increase the durability of the compressor blades of the GTE of aircraft engines Ti-Al-N-based vacuum-plasma coatings obtained by Avinit technologies, which ensure the application of hard, high-quality coatings with dramatically reduced micro-arc damage, were selected as candidates. Avinit multilayer coatings have higher functional characteristics than TiN (microhardness, crack resistance, temperature resistance, erosion and corrosion resistance) and may be promising for applying erosion-resistant coatings for compressor blades. Avinit technologies are technologically closest to the vacuum-plasma technologies used in industrial production for applying TiN protective coatings. New multi-layered 2D nanocomposite wear-resistant ion-plasma hard coatings Avinit (TiN-AlN)n have been developed. The created software products made it possible to reach a qualitatively new level in terms of further modification and improvement of the designs of Avinit functional coatings, stability of technologies and improvement of their quality control when applying such coatings for use in the production of compressor blades of gas turbine engines of aircraft engines. Special attention is paid to methods of preliminary ion-plasma treatment of surfaces before coating. Metallographic studies of the chemical and phase composition and structure of Avinit (TiN-AlN)n coatings have been carried out. The thickness of the coatings is 7–9 μm, the microhardness is 34–35 GPa (compared to the serially used TiN coating: 27.4 GPa). The use of three-stage ion-plasma treatment in Avinit technologies using a double vacuum-arc discharge followed by the application of strengthening coatings in a single technological cycle eliminates the formation of cracks and ensures the production of tightly bonded, high-quality coatings of a given composition with the maximally reduced share of the droplet component. The developed coatings (TiN-AlN)n were applied to experimental batches of working compressor blades of GTE aircraft engines for bench tests.