Dissertations / Theses on the topic 'Сплави заліза'
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Сьомкіна, Олена Володимирівна. "Удосконалення електрохімічного осадження функціональних покрить міддю на сплави заліза та алюмінію." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/39104.
Full textThesis for the degree of candidate of technical sciences in specialty 05.17.03 – technical electrochemistry. – National Technical University "Kharkov Polytechnic Institute", Kharkiv, 2018. The thesis is devoted to the improvement of the technological process of applying copper coatings to products made of alloys of iron and aluminum, which are intended for electrical purposes. The kinetics and mechanism of the reduction of the copper hydroxotartrate complex are studied. It is found that the cathodic process includes delayed stage of electron transfer and chemical dissociation stage of the complex ion. The composition of the electrolyte for copper deposition has been developed, which ensures the deposition of coatings with good adhesion to the electronegative base. The resulting solution is environmentally safe and stable for long-term use. The effect of electrolysis parameters on the morphology and quality of the coatings was studied. In order to improve the adhesion of the copper deposit to parts made of aluminum alloys, it is necessary to create an oxide film having a developed porous surface, which is specified by the conditions of its formation. The corrosion and electrical characteristics of the oxides formed are revealed. It is determined that the addition of the fluoride ion (as activating impurity to the electrolyte for copper plating) promotes a more even distribution of the metal over the surface of the alloys.
Сьомкіна, Олена Володимирівна. "Удосконалення електрохімічного осадження функціональних покрить міддю на сплави заліза та алюмінію." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/39049.
Full textThesis for the degree of candidate of technical sciences in specialty 05.17.03 – technical electrochemistry. – National Technical University "Kharkov Polytechnic Institute", Kharkiv, 2018. The thesis is devoted to the improvement of the technological process of applying copper coatings to products made of alloys of iron and aluminum, which are intended for electrical purposes. The kinetics and mechanism of the reduction of the copper hydroxotartrate complex are studied. It is found that the cathodic process includes delayed stage of electron transfer and chemical dissociation stage of the complex ion. The composition of the electrolyte for copper deposition has been developed, which ensures the deposition of coatings with good adhesion to the electronegative base. The resulting solution is environmentally safe and stable for long-term use. The effect of electrolysis parameters on the morphology and quality of the coatings was studied. In order to improve the adhesion of the copper deposit to parts made of aluminum alloys, it is necessary to create an oxide film having a developed porous surface, which is specified by the conditions of its formation. The corrosion and electrical characteristics of the oxides formed are revealed. It is determined that the addition of the fluoride ion (as activating impurity to the electrolyte for copper plating) promotes a more even distribution of the metal over the surface of the alloys.
Єрмоленко, Ірина Юріївна, Марина Віталіївна Ведь, and Микола Дмитрович Сахненко. "Морфологія і магнітні характеристики покриттів тернарними сплавами заліза і кобальту з молібденом і вольфрамом." Thesis, Національний університет харчових технологій, 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/34625.
Full textKlymenko, D. "Iron in industry." Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/33562.
Full textСвириденко, М. В. "Дослідження механічних та технологічних властивостей сплаву на основі заліза, зміцненого карбідами титану." Master's thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/75694.
Full textЄрмоленко, Ірина Юріївна. "Наукові основи електрохімічної технології покриттів тернарними сплавами заліза з тугоплавкими металами." Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37459.
Full textDissertation for the Degree of the Doctor of Engineering Sciences in the Specialty of 05.17.03 – Technical Electrochemistry. – National Technical University "Kharkіv Polytechnic Institute", Kharkіv, 2018. This doctoral thesis is devoted to the development of scientific basics for electrochemical technologies used for the application of coatings consisting of ternary iron and cobalt alloys combined with molybdenum and tungsten of improved functionality. The hypothesis as for the competitive reduction of iron ternary metals with refractory components preconditioned by the mutual interaction of thermal-&-dynamic and crystal-&-chemical characteristics of the alloy-forming metals and the kinetic parameters of cathode process and it was proved experimentally. The kinetic regularities of the co-reduction in Fe³⁺ ‒ MoO₄²⁻ ‒ WO₄²⁻ ‒ Cit³⁻, Fe³⁺ ‒ Со²+ ‒ WO₄²⁻ (MoO₄²⁻) ‒ Cit³⁻ systems have been defined and the mechanism of deposition of ternary Fe-Mo-W, Fe-Co-W (Mo) alloys has been substantiated. The influence of composition of electrolytes and modes of electrolysis on elemental, phase composition and surface morphology of the obtained coatings has been deter-mined. The possibility of controlling the composition and morphology of multicomponent coatings on the basis of iron and cobalt by varying the composition of the electrolyte (the ratio of component concentrations, the ratio of ligand and complexing agent), and by used of galvanostatic and pulsed electrolysis regimes with a ranging of current density 2.5 ‒ 6.5 A/dm², and durations pulse/pause 5 ‒ 10 / 5 ‒ 20 ms, has been proved. The electrolytes and the deposition modes were developed that provide the deposition of Fe-Co-W coatings with the Co content of 32 to 47 аt. %, and W of 5 to 13 аt. %, and Fe-Mo-W coatings with the tungsten content of 5 to 11 at. %, and the molybdenum contents of 26 to 32 at. %, and the Fe-Сo-Мо coatings with the Co content ranging from 26 to 48 at. %, and Mo content ranging from 15 to 31 at. %, and the current efficiency ranging from 58 to 82 %. The variation schemes of electrochemical processes were suggested and these allow for the deposition of Fe-Mo-W and Fe-Co-W(Мо) coatings depending on their practical application. The perspective directions of the application of the obtained materials according to the results of experimental researches and tests of functional properties in model environments and technological conditions are determined.
Єрмоленко, Ірина Юріївна. "Наукові основи електрохімічної технології покриттів тернарними сплавами заліза з тугоплавкими металами." Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37455.
Full textDissertation for the Degree of the Doctor of Engineering Sciences in the Specialty of 05.17.03 – Technical Electrochemistry. – National Technical University "Kharkіv Polytechnic Institute", Kharkіv, 2018. This doctoral thesis is devoted to the development of scientific basics for electrochemical technologies used for the application of coatings consisting of ternary iron and cobalt alloys combined with molybdenum and tungsten of improved functionality. The hypothesis as for the competitive reduction of iron ternary metals with refractory components preconditioned by the mutual interaction of thermal-&-dynamic and crystal-&-chemical characteristics of the alloy-forming metals and the kinetic parameters of cathode process and it was proved experimentally. The kinetic regularities of the co-reduction in Fe³⁺ ‒ MoO₄²⁻ ‒ WO₄²⁻ ‒ Cit³⁻, Fe³⁺ ‒ Со²+ ‒ WO₄²⁻ (MoO₄²⁻) ‒ Cit³⁻ systems have been defined and the mechanism of deposition of ternary Fe-Mo-W, Fe-Co-W (Mo) alloys has been substantiated. The influence of composition of electrolytes and modes of electrolysis on elemental, phase composition and surface morphology of the obtained coatings has been deter-mined. The possibility of controlling the composition and morphology of multicomponent coatings on the basis of iron and cobalt by varying the composition of the electrolyte (the ratio of component concentrations, the ratio of ligand and complexing agent), and by used of galvanostatic and pulsed electrolysis regimes with a ranging of current density 2.5 ‒ 6.5 A/dm², and durations pulse/pause 5 ‒ 10 / 5 ‒ 20 ms, has been proved. The electrolytes and the deposition modes were developed that provide the deposition of Fe-Co-W coatings with the Co content of 32 to 47 аt. %, and W of 5 to 13 аt. %, and Fe-Mo-W coatings with the tungsten content of 5 to 11 at. %, and the molybdenum contents of 26 to 32 at. %, and the Fe-Сo-Мо coatings with the Co content ranging from 26 to 48 at. %, and Mo content ranging from 15 to 31 at. %, and the current efficiency ranging from 58 to 82 %. The variation schemes of electrochemical processes were suggested and these allow for the deposition of Fe-Mo-W and Fe-Co-W(Мо) coatings depending on their practical application. The perspective directions of the application of the obtained materials according to the results of experimental researches and tests of functional properties in model environments and technological conditions are determined.
Лагдан, Інна Володимирівна, Микола Дмитрович Сахненко, Марина Віталіївна Ведь, and Ірина Юріївна Єрмоленко. "Електролітичні покриття сплавом залізо-кобальт-вольфрам." Thesis, Національний технічний університет України "Київський політехнічний інститут", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/34636.
Full textКаракуркчі, Ганна Володимирівна, Марина Віталіївна Ведь, Микола Дмитрович Сахненко, and Світлана Іванівна Зюбанова. "Електроосадження покриттів подвійними та потрійними сплавами заліза." Thesis, Ноулідж, 2014. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22625.
Full textСачанова, Юлія Іванівна, Інна Володимирівна Лагдан, Микола Дмитрович Сахненко, Марина Віталіївна Ведь, Ірина Юріївна Єрмоленко, and Ганна Володимирівна Каракуркчі. "Функціональні електролітичні покриви сплавами заліза з тугоплавкими металами." Thesis, ТОВ "Нілан-ЛТД", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22604.
Full textЛагдан, Інна Володимирівна, Микола Дмитрович Сахненко, Марина Віталіївна Ведь, and Ірина Юріївна Єрмоленко. "Електролітичні покриття сплавом залізо-кобальт-вольфрам." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41690.
Full textКрасовська, Л. А., and Борис Іванович Байрачний. "Дослідження процесу електрохімічного отримання сплаву Fe-Cо." Thesis, НТУ "ХПІ", 2007. http://repository.kpi.kharkov.ua/handle/KhPI-Press/20619.
Full textКаракуркчі, Ганна Володимирівна. "Електрохімічне формування функціональних покриттів сплавами заліза з молібденом і вольфрамом." Thesis, НТУ "ХПІ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21865.
Full textThesis for granting the Degree of Candidate of Technical sciences in speciality 05.17.03 – Technical Electrochemistry. – National Technical University “Kharkiv Politechnical Institute”, 2015. The thesis is devoted to the development of technology for iron alloys electrochemical functional coatings with molybdenum and tungsten electrodeposition from citrate electrolyte to produce materials with high corrosion resistance, physical, mechanical and tribological properties. On the basis of kinetic regularities the mechanism of Fe-Mo, Fe-Mo-W alloys’ formation was established as co-precipitation of iron with molybdenum and tungsten in the range pH 3,0–4,0 happening on two routes, one-alloying metals reduction from heteronuclear complexes [FeHCitMO₄]⁻ is accompanied by chemical reaction of ligand releasing, and the second-reduction of iron (III) from the adsorbed complexes [FeHCit]⁺ and in part – from FeOH²⁺ accompanied by the chemical stage of ligand release. Experimental study of the electrolytic alloys functional properties have shown the high corrosion resistance of FeMo and Fe-Mo-W coatings in acidic and neutral media stimulated by acidic nature of refractory oxide components which exceeds the resistance of steel and cast iron. Proposed electrolytic alloys dominated by microhardness steel substrates in 2–3 times, and cast iron – in 4–5 times, the increasing tungsten content provides increasing in physical, mechanical and tribological properties of electrolytic alloys due to the formation of amorphous structure. A technological scheme for electrochemical synthesis of iron alloys functional coatings with molybdenum and tungsten was designed and technological instructions were prepared for implementation.
Каракуркчі, Ганна Володимирівна, Марина Віталіївна Ведь, and Микола Дмитрович Сахненко. "Електрохімічне формування функціональних покриттів сплавами заліза з тугоплавкими металами на сірих чавунах." Thesis, ТОВ "Нілан-ЛТД", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22600.
Full textКнязєв, Сергій Анатолійович. "Ідентифікація неметалевих включень шляхом металографічного дослідження мікрошліфів у поляризованому світлі." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/46231.
Full textРалко, Артур Володимирович. "Структурно-фазовий стан поверхневих шарів армко-заліза після лазерного легування сумішшю порошків нікелю, кобальту та хрому." Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/3698.
Full textUA : В роботі 53 сторінок, 13 рисунків, 2 таблиць та було використано 60 літературних джерел. Об’єкт дослідження – стрктурно-фазовий стан поверхневих шарів армко-заліза, після лазерного легування сумішшю порошків металів групи заліза. Мета роботи: встановити можливість створення за допомогою метода лазерного легування високоентропійного сплаву в поверхневих шарах армко-заліза. Метод дослідження – рентгенівський фазовий, металографічний, вимірювання мікротвердості та метод растрової електронної мікроскопії. В кваліфікаційній роботі за допомогою рентгенівського фазового аналізу було досліджено фазовий склад зразків у вихідному стані та після лазерної обробки на повітрі. Проаналізували структуру та фізико-механічні властивості при поверхневого шару зразків після лазерного легування та визначили значення мікротвердості за глибиною в зоні лазерної дії.
EN : In the work 53 pages, 2 tables and 13 figures, was used 60 literary sources. The object of the study is the structural-phase state of the surface layers of armco-iron, after laser doping with a mixture of powders of metals of the iron group. Purpose: to establish the possibility of creating a high-entropy alloy in the surface layers of armco-iron using the method of laser doping. The research method is X-ray phase, metallographic, microhardness measurement and scanning electron microscopy method. In the qualification work with the help of X-ray phase analysis, the phase composition of the samples in the initial state and after laser treatment in air was investigated. The structure and physico-mechanical properties of the surface layer of the samples after laser doping were analyzed and the values of microhardness in depth in the laser action zone were determined.