Добірка наукової літератури з теми "Heteroxide coating"
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Статті в журналах з теми "Heteroxide coating"
Sakhnenko, Mykola, Iryna Stepanova, Svitlana Zyubanova, Anatoly Djenyuk, and Sergey Indykov. "Photocatalytic activity of oxide systems based on doped d-elements of titanium alloys." Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies, no. 3(9) (October 18, 2021): 97–102. http://dx.doi.org/10.20998/2413-4295.2021.03.14.
Повний текст джерелаСУЧКОВ, С. Н. "Influence of electric current characteristics of the formation process on the properties of PEO-coatings, obtained on MA8 magnesium alloy in potentiodynamic mode." Вестник ДВО РАН, no. 6(214) (December 24, 2020): 116–23. http://dx.doi.org/10.37102/08697698.2020.214.6.014.
Повний текст джерелаSakhnenko, Mykola, Serhii Indykov, and Hanna Karakurkchi. "APPLICATION OF PLASMA-ELECTROLYTE COATINGS ON TITANIUM WITH REFRACTORY METALS FOR DETOXIFICATION OF ENVIRONMENTS FROM POLLUTING SUBSTANCES." Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies, no. 1(7) (April 23, 2021): 96–102. http://dx.doi.org/10.20998/2413-4295.2021.01.14.
Повний текст джерелаKarakurkchi, Hanna, Mykola Sakhnenko, Irina Yermolenko, Serhii Indykov, Natalia Horokhivska, and Vasyl Sarai. "FUNCTIONAL ELECTROCHEMICAL COATINGS IN DUAL-USE TECHNOLOGIES." Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies, no. 2(8) (June 15, 2021): 101–12. http://dx.doi.org/10.20998/2413-4295.2021.02.15.
Повний текст джерелаДисертації з теми "Heteroxide coating"
Каракуркчі, Ганна Володимирівна. "Науково-технологічні засади плазмо-електролітного формування гетерооксидних покриттів для екотехнологій". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/48805.
Повний текст джерелаDissertation for the Degree of the Doctor of Engineering Sciences in the Specialty of 05.17.03 – technical Electrochemistry (161 – Chemical Technology and Engineering). – National Technical University "Kharkіv Polytechnic Institute", Kharkіv, 2020. The object of research is chemical and electrochemical processes in the volume of electrolyte, oxide coating and interface in the formation of heteroxide coatings on aluminum and titanium alloys. The subject of research is the mechanism of the surface treatment of aluminum and titanium alloys in alkaline solutions of electrolytes, technological parameters of plasma-electrolyte oxidation, composition, structure and functional properties of heteroxide coatings. The thesis is devoted to the development of scientific bases of plasma-electrolytic formation of heterooxide coatings of a given composition and functional properties on aluminum (titanium) alloys for ecotechnologies. Hypotheses were generated and experimentally proved concerning the homogenization of the surface of aluminum (titanium) multicomponent alloys and the formation of a given relief of the oxide matrix by plasma-electrolyte oxidation in alkaline solutions of diphosphates and the formation of strongly adhesed heteroxide coatings with a wide range of functional properties on aluminium (titanium) alloys by executing plasma-electrolytic oxidation in alkaline solutions of diphosphates with the presence of dopant metal compounds in one technological process. As a result of a comprehensive study of plasma-electrolytic oxidation of multicomponent alloys, a new paradigm of surface engineering is proposed, according to which in one technological process the surface of processed materials is homogenized with minimization of their alloying components, formation of predefined topography of Al₂O₃ (TiO₂) monoxide matrix and simultaneous incorporation of target alloying components. The use of complex electrolytes based on alkali metal diphosphates for acceleration of electrochemical dissolution, binding and removal of alloying components from the surface layers of multicomponent aluminum (titanium) alloys is proposed, ways to control surface homogenization are established and it is proved that PEO 1.0 in 0.5 mol/L K₄P₂O₇ solution at a current density of 5–7 A/dm² allows to reduce the content of alloying components in the surface layers by 4–5 times and to form developed oxide matrix of the metal-carrier, which became the basis for the development of a generalized flow chart. It is proposed to use a strategy for the synthesis of heteroxide coatings by plasma-electrolyte oxidation of alloyed aluminum (titanium) alloys with the formation of the oxide matrix of the metal-carrier and the incorporation of oxides of metal-dopants in one process; it is proved that the ratio of electrolyte components affects the content of dopant, morphology and topography of the heteroxide coating surface. With the use of differential dependences dU/dt–U in order to describe the kinetic laws and establish the stages of the process of plasma-electrolytic oxidation of alloys of different chemical composition, it is proved that the difference in the slope of such dependences at the initial sites of PEO is due to the formation of oxides of different nature, and the dominant of dissolution reactions of alloys components over the reaction of oxide formation with high resistivity cause the appearance of a plateau on the dU / dt – U dependence, the length of which reflects the formation of a heteroxide layer. The conception of incorporation of Mn and Co oxides into the coatings was substantiated and it is proved that in alkaline electrolytes, which are based on diphosphates, with the addition of metal-dopant salts in the mode of "decreasing power" with variation of current density heteroxide oxide coatings Al₂O₃·MnOₓ with manganese content up to 36 % and Al₂O₃·CoOᵧ with cobalt content up to 24.0 %, are formed that allowed to determine the optimal synthesis conditions. The formation of matrix of metal-carrier in proposed modes with a phase structure of corundum, in which oxides of dopant metals of variable valence are incorporated, is confirmed. It is established that a significant increase in microhardness for the system Al | Al₂O₃·CoOᵧ is caused not only by the formation of α-Al₂O₃ in breakdown paths, but also by the formation of the structure of CoAl₂O₄ sapphire due to chemical substitution and it is proved that heat treatment of heteroxide coatings at temperatures of 300–500 °C causes a change in the ratio of oxide forms of alloying components while maintaining high microhardness values. It is established that one-stage plasma-electrolyte treatment of the KamAZ-740 engine piston in diphosphate solutions with the addition of manganates (VII) and cobalt (II) salts allows to form uniform strongly adhered catalytic and heat-protective heteroxide coatings by oxides of manganese and cobalt, high activity of which was proved in the process of catalytic fuel combustion. The idea of the system of factors influencing the composition, morphology, topography and structure of heteroxide coatings on alloyed aluminum (titanium) alloys and the dependence of the functional properties of oxide layers on the mode of formation and surface composition was further developed. The practical significance of the obtained results lies in the development of variable technological schemes of plasma-electrolyte treatment of multicomponent aluminum (titanium) alloys in diphosphate solutions with minimization of alloying components in surface layers and formation of heteroxide coatings with high content of active components and given functional properties. Testing of the developed coatings on the test benches of the Department of Internal Combustion Engines of NTU "KhPI" revealed a reduction in emissions of nitrogen and carbon oxides and increase in fuel efficiency of engines due to internal cylinder catalysis. The results of tests of heteroxide coatings in the Kharkiv Scientific Research Forensic Center of the Ministry of Internal Affairs of Ukraine established their increased corrosion resistance and mechanical strength, which allowed to recommend the obtained materials to protect against corrosion damage and increase the mechanical strength of detonator caps used for blasting. Increased mechanical properties and high adhesive strength of oxide coatings to the base metal were confirmed by tests at JSC "UKRNDIHIMMASH". Theoretical materials and practical results of the research were used in the educational process of the National Aerospace University named after M.E. Zhukovsky "Kharkiv Aviation Institute" in the training of specialists in the specialty "Thermal power" and the Military Institute of Armored Forces of NTU "KhPI" in the training of cadets in the specialties "Provision of troops (forces)" and "Armament and military equipment". The scientific and technical novelty of the developments is confirmed by 7 patents of Ukraine, some of which were awarded diplomas of the All-Army competition "Best Invention of the Year", namely: patent of Ukraine # 116176 "Method of reducing toxicity of gaseous emissions from internal combustion engines" (first-degree diploma certificate in nomination "Automotive Equipment", 2017); patent of Ukraine # 117765 "Method of processing pistons of internal combustion engines" (second-degree diploma certificate in nomination "Automotive Equipment", 2018); patent of Ukraine # 135696 "Piston of an internal combustion engine with a catalytic heat-resistant coating" (diploma certificate "For the originality of the technical solution", 2019).
Каракуркчі, Ганна Володимирівна. "Науково-технологічні засади плазмо-електролітного формування гетерооксидних покриттів для екотехнологій". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/48802.
Повний текст джерелаThesis for scientific degree of Doctor of Technical Sciences in the Specialty of 05.17.03 – Technical Electrochemistry (161 – Chemical Technology and Engineering). – National Technical University "Kharkіv Polytechnic Institute", Kharkіv, 2020. The thesis is devoted to the development of scientific bases of plasma-electrolytic formation of heterooxide coatings of a given composition and functional properties on Al (Ti) alloys for ecotechnologies. Hypotheses were generated and experimentally proved concerning the homogenization of the surface of aluminum (titanium) multicomponent alloys and the formation of a given relief of the oxide matrix by plasma-electrolyte oxidation in alkaline solutions of diphosphates and the formation of strongly adhesed heteroxide coatings with a wide range of functional properties on aluminium (titanium) alloys by executing plasma-electrolytic oxidation in alkaline solutions of diphosphates with the presence of dopant metal compounds in one technological process. With the use of differential dependences dU/dt–U in order to describe the kinetic laws and establish the stages of the process of plasma-electrolytic oxidation of alloys of different chemical composition. It found that the use of complex electrolytes based on alkali metal allows to reduce the content of alloying components in the surface layers by 4–5 times and to form developed oxide matrix of the metal-carrier. It proved that in the mode of "decreasing power" with variation of current density heteroxide oxide coatings with Ѡ(Mn) up 36.0 аt. % and with Ѡ(Co) up 24.0 аt. %, that allowed to determine the optimal synthesis conditions. The formation of matrix of metal-carrier in proposed modes, in which oxides of dopant metals of variable valence are incorporated, is confirmed. It is proved that heat treatment of heteroxide coatings at temperatures up 600°C causes a change in the ratio of oxide forms of alloying components while maintaining high microhardness values. It is established that one-stage plasma-electrolyte treatment of the KamAZ-740 engine piston in in developed electrolytes and modes allows to form uniform strongly adhered catalytic and heat-protective heteroxide coatings by oxides of manganese and cobalt, high activity of which was proved in the process of catalytic fuel combustion. The variation schemes of of plasma-electrolytic treatment of multicomponent Al (Ti) alloys with the increased content of active components and the set functional properties were suggested. The perspective areas of the application of the obtained materials according to the results of experimental researches and tests of properties in model environments and technological conditions are determined.
Частини книг з теми "Heteroxide coating"
Sakhnenko, M. D., and A. M. Korohodska. "GENESIS OF FUNCTIONAL COATINGS BY ALLOYS AND HETEROXIDE COMPOSITES OF THE FE – CO – MO SYSTEM." In EUROPEAN WAYS OF THE DEVELOPMENT OF MODERN ENGINEERING RESEARCH, 168–89. Izdevnieciba “Baltija Publishing”, 2021. http://dx.doi.org/10.30525/978-9934-26-142-8-7.
Повний текст джерела