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Information × Registration Number 0216U001572, 0114U001918 , R & D reports Title Study of nanostructure wear-resistant nitride coatings deposited from vacuum-arc filtered plasma with using of powder titanium and chromium based cathodes popup.stage_title Head Strel'nitskij Vladimir Evgenievich, Доктор фізико-математичних наук Registration Date 24-02-2016 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 Research report: 84 p., 32 fig., 4 tab., 62 references. The object of study - the process of coatings deposition from the vacuum-arc plasma source with multicomponent powder cathodes. Purpose - experimental and theoretical study of processes of synthesis, structure and properties of nitride coatings deposited from filtered vacuum-arc plasma source with the powder cathode (based on Ti and Cr) when applying a high-voltage pulsed substrate bias potential. The research methods: X-ray fluorescence analysis, X-ray diffraction, nanoindentation, optical profilometry, scratch testing, mathematical modeling of formation of residual stresses, cavitation and abrasive tests. A study of the vacuum-arc filtered plasma source operation with experimental powder cathodes of the Ti-Si, Ti-Cr-Si, Ti-Cr-Si-C and Cr-Al compositions was carried out. It is found that when operating with Ti-based cathodes the problems with the stability of the vacuum arc discharge arise and the reproducibility the cathode material composition in the coatings is not satisfactory. In contrast, the Cr-based cathodes showed stable performance and good reproducibility of the cathode material composition in the coating. It is shown that Cr0,5Al0,5 cathodes, which have been produced by powder metallurgy, are suitable for the production of the vacuum-arc nitride coatings. Using multicomponent powder cathodes of Cr0,5Al0,5 composition under conditions of high voltage pulsed substrate bias potential the coatings of Cr-Al-N system were deposited. The parameters of the deposition to synthesize coatings (Cr,Al)N with a cubic structure of the type NaCl were revealed. The coatings are characterized by a surface roughness level of (40-50) nm, high hardness (30-36) GPa and a low coefficient of friction, which allows to use them as protective coatings. Coatings (Cr,Al)N, synthesized from powder cathodes with a pulsed bias potential of 1.5-2.5 kV, showed a high resistance to abrasion and cavitation. It is found that the coating deposited on the surface of steel allows to reduce its wear an order of the value in both types of tests. In frame of the model of nonlocal thermoelastic peak of low energy ion, a formula for internal stresses in the multi-component material deposited from the mixed ion beam in the modes of constant (DC) and pulsed substrate bias was developed. The formula allows you to explore the dependence of the stress on the sort of ions, partial ion content in the plasma stream, bias potential and the substrate temperature. The formula predicts the significant change of the level of internal stresses in the multicomponent coating by a slight change of the substrate temperature during deposition. It is shown that one of the further ways of ensuring the optimum level of residual stress, improving the adhesion of coatings to the substrate and improve their performance properties is a careful adjusting the substrate temperature during deposition both at DC and the pulsed bias potential. Forecast assumptions on the development of the object of study is the development of the physical foundations of the process the synthesis of protective nanostructured coatings characterized by record values of physical, mechanical, chemical and tribological properties. The main areas of use of the proposed technology is hardening tools, compressor blades and turbine engine of airplanes, steam turbine blades, as well as friction pairs operating in extreme onditions. VACUUM-ARC DEPOSITION, FILTERED PLASMA, HIGH-VOLTAGE PULSED POTENTIAL, MULTI-COMPONENT NITRIDE COATING, HARDNESS. Product Description popup.authors Аксьонов Дмитро Сергійович Васильєв Володимир Васильович Калініченко Олександр Іванович Коваленко Володимир Іванович Лучанінов Олександр Андрійович Маринін Володимир Григорович Решетняк Олена Миколаївна Стрельницький Володимир Євгенійович Толмачова Галина Миколаївна popup.nrat_date 2020-04-02 Close