Готові списки джерел за темами / Electrospark treatment

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Добірка наукової літератури з теми "Electrospark treatment"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Electrospark treatment"

PLISZKA, Izabela, Norbert RADEK, and Aneta GĄDEK-MOSZCZAK. "PROPERTIES OF WC-Cu ELECTRO SPARK COATINGS SUBJECTED TO LASER MODIFICATION." Tribologia, no. 5 (October 31, 2017): 73–79. http://dx.doi.org/10.5604/01.3001.0010.5906.

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The article presents the possibilities of using laser surface modification on the way EDM to better tribological properties. The paper tries to expand knowledge in the fields of the application of electrospark deposition. Surface treatment by applying a coating by electrospark deposition has many advantages (e.g., local interface or applying thin layers); therefore, this technology is used in the industry. Concentrated streams of laser beams can effectively modified the state of the electrospark coating, WC-Cu, and improve its performance. The aim of the study is to evaluate the influence of laser treatment on the properties of electrospark coatings. Evaluation of the properties of the coatings after laser treatment was carried out by observation of the microstructure, surface geometry analysis, and tribological test.

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Scendo, Mieczysław, Norbert Radek, and Joanna Trela. "The Influence of Electrospark and Laser Treatment upon Corrosive Resistance of Carbon Steel ." Advanced Materials Research 874 (January 2014): 107–12. http://dx.doi.org/10.4028/www.scientific.net/amr.874.107.

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The influence on corrosion resistance of C45 carbon steel in chloride environment covered by coats of tungsten carbide and copper were examined. The coats were put on the surface of steel by electrospark method. The potentiodynamic polarization technique for corrosive investigations was applied. The topography of surface by scanning electron microscope (SEM) was observed. The most corrosion resistance was exhibited for steel covered by mixture of the 25% WC and 75% Cu nanopowders. The top layer of coating is not homogeneous and consists of copper, WC2, tungsten carbide and iron. The laser treatment modifies of the electrospark layer and influences on the correct it usable properties.

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Romanov, I. V., and R. N. Zadorozhny. "Selection of electric spark processing modes for electrodes from sintered bronze." Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta 7, no. 1 (March 25, 2021): 96–104. http://dx.doi.org/10.22281/2413-9920-2021-07-01-96-104.

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The method of electrospark machining has proven itself well in the technology of repair and restoration of parts. The operational properties of coatings obtained by this method depend on the microstructure, chemical and phase composition of the electrode materials. A significant improvement in operational properties, for example, wear resistance, is achieved by the formation of nanostructured coatings using electrodes with a certain content of alloying nanomaterials. It is possible to obtain such materials at the lowest cost by electro-erosion dispersion of machine-building waste. This article discusses the electrodes obtained by sintering bronze powder obtained by the method of electroerosive dispersion. Such materials are new for the process of electrospark machining; therefore, it is important to study and select the optimal application modes, since a qualitative characteristic of the process is the indicator of the transfer of the electrode material to the part, which depends on the processing modes and installation parameters. The aim of the study is to select the modes of the installation for electrospark treatment for optimal deposition of the material, as well as to study the degree of coating increment during electrospark treatment. Coating was carried out using an installation for electrospark treatment mod. «Westron» type AI-007, electrode material was obtained by the technology of spark plasma sintering of bronze powder, surfacing was carried out on steel samples 14 × 14 × 40 mm in size, the work also used an Acculab ALC-210d4 analytical balance and an MG micrometer Н25 GOST 6507-90. All coatings were applied to samples with an equal area in three layers under different processing conditions. After that, the increment in the thickness and mass of the electrode material on the sample surface was measured. Based on the results of the work, formulas were obtained and graphs were built. The most optimal mode of coating with an electrode made of sintered bronze obtained from machine-building waste by the method of electroerosive dispersion was determined, which proves the consistency of this method of obtaining electrode materials.

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Filonovich, Alexander, Irina Vornacheva, Artem Chuichenko, and Evgeny Bolotnikov. "The mathematical modeling of the process of hardening treatment of titanium blades of steam turbines." MATEC Web of Conferences 344 (2021): 01006. http://dx.doi.org/10.1051/matecconf/202134401006.

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Mathematical models of the surface hardening of VT20 and OT4 titanium alloys by electrospark alloying have been developed. These models can be used in the design of technological processes for the manufacture of titanium blades for steam turbines.

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Petrov, Oleksandr, Sergei Petrichenko, Anna Yushchishina, Olena Mitryasova, and Volodymyr Pohrebennyk. "Electrospark Method in Galvanic Wastewater Treatment for Heavy Metal Removal." Applied Sciences 10, no. 15 (July 27, 2020): 5148. http://dx.doi.org/10.3390/app10155148.

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The objective of this research is to improve water treatment use of the electric spark method. Studies on the treatment of multicomponent galvanic effluent by the electric spark method using metal loading (Fe, Al) and low-voltage (up to 1000 V) equipment have been carried out. The factors that have the largest influence on the degree of galvanic wastewaters purification are the conditions and parameters of the discharge pulse—an efficiency of approximately 0.8–0.85 has a specific energy, which at moderate concentrations of pollutants can be less than 65 kJ/dm3 (18 kWh/m3)—and the metal loading height. Other variable technological parameters can serve either as scaling tools or as methods for regulating the operation of electrical equipment. The research shows that the degree of purification depends on the specific energy and the height of the metal loading of the reactor, and it weakly depends on the pulse energy and the speed of its input. The concentrations of heavy metals (Zn2+, Cr6++Cr3+, Cu2+) in the treated water are significantly lower than their maximal permissible concentrations. The electric spark method allows us to achieve highly efficient results of wastewater treatment from heavy metals.

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Radek, N., E. Wajs, and M. Luchka. "The WC-Co electrospark alloying coatings modified by laser treatment." Powder Metallurgy and Metal Ceramics 47, no. 3-4 (March 2008): 197–201. http://dx.doi.org/10.1007/s11106-008-9005-7.

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Burkov, Alexander A., Pavel G. Chigrin, and Mariya A. Kulik. "The Influence of the Working Conditions of the Electrospark Granules Deposition on the Formation of Cracks in Ti-Al Intermetallic Coatings." Solid State Phenomena 316 (April 2021): 814–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.814.

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Electrospark treatment of a titanium alloy Ti6Al4V in a mixture of granules allows the formation of intermetallic Ti-Al coatings. The coating structure is penetrated by a network of cracks with a thickness of 0.46 to 1.19 microns and a specific area of 1.5 to 3.4%. A change in the ratio of Ti to Al in the mixture of granules does not lead to a monotonic change in the thickness and number of cracks. A decrease in the pulse duration from 200 to 20 μs leads to a slight decrease in the thickness of cracks and significantly increases their total area from 2.1 to 3.4%. An increase in the discharge pulse repetition rate can significantly increase the thickness of cracks in Ti-Al electrospark coatings.

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Luo, Cheng, Shi Jie Dong, and Xiang Xiong. "Microstructure and Properties of TiC Coating by Vibrating Electrospark Deposition." Key Engineering Materials 373-374 (March 2008): 180–83. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.180.

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Protective TiC coating was produced on Cr-Zr-Cu electrode by vibrating electrospark deposition. Microstructure of the functional coating with pre-treatment (clean) and post-treatment (diffusion) were tested respectively. The deposition parameters on the structure of the substrate is discussed. The results indicate that as-deposited substrate consists of four layers. There are many micro-porous and micro-cracks in transition layer where mutual diffusion of Ti and Cu occurs, which provides atomic bonding between the coating and the substrate. Pre-treatment modifies the coating structure with small influence on its hardness whereas post-treatment modifies it and reduces its hardness and thickness. The service time of the specimens with TiC coating 2.4 times exceeds that of the uncoated ones.

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Velichko, S. A., P. V. Senin, V. I. Ivanov, and A. V. Martynov. "Investigation into the performance of the friction surfaces developed by electrospark treatment." Surface Engineering and Applied Electrochemistry 52, no. 3 (May 2016): 225–32. http://dx.doi.org/10.3103/s1068375516030133.

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Kuznetsov, I. S., and A. V. Kolomeichenko. "Mass Transfer of a Nanocrystalline 5BDSR Alloy during Low-Voltage Electrospark Treatment." Russian Metallurgy (Metally) 2019, no. 13 (December 2019): 1438–41. http://dx.doi.org/10.1134/s0036029519130196.

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Більше джерел

Дисертації з теми "Electrospark treatment"

Захарчук, Олександр Любомирович. "Дослідження тріботехнічних властивостей покриття комбінованою обробкою". Master's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/31445.

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Анотація:

На даний час в країні розвивається машинобудівна промисловість. Тож виготовлення штампів холодного штампування потрібне систематично, що в свою чергу вимагає великої кількості обладнання різного типу. Дана конструкція сприймає надлишковий тиск , тож ремонт штампів є відповідальною операцією, тому так важливий «свіжий» погляд на застарілі технології і їх проблеми. Завдяки новому, більш ефективному технологічному процесу, теоретично можна збільшити продуктивність, швидкість та економічність виготовлення. Метою даної дисертації є переосмислення застарілих підходів до базових технологічних процесів ремонту штампів. Модернізувати та покращити технологію для досягнення більшої продуктивності, економічності та перспективності за допомогою нових, перспективних та сучасних технологій. На ряду з підвищення кількісно-якісних показників, стояло важливою задачею забезпечення та дотримання, покращених вимог охорони праці та розробки для неї стартап-проекту.
Currently, the country is developing machine-building industry. Therefore, the production of cold stamping stamps is required systematically, which in turn requires a large amount of equipment of various types. This design assumes excess pressure, so stamp repair is a responsible operation, which is why a “fresh” look at outdated technologies and their problems is so important. Thanks to a new, more efficient technological process, it is theoretically possible to increase the productivity, speed and economy of production. The purpose of this dissertation is to rethink outdated approaches to basic technological processes of stamp repair. Upgrade and improve technology to increase productivity, economy and prospects with new, up-to-date and advanced technologies. In addition to improving the quantitative and qualitative indicators, it was an important task to ensure and comply with, improved requirements for occupational safety and development for her startup project.

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Ніколаєнко, А. С., Оксана Петрівна Гапонова, Оксана Петровна Гапонова та Oksana Petrivna Haponova. "Метод нанесеня захисного покриття на робочу поверхню деталі шляхом електроіскрового легування". Thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67470.

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Sarpola, A. (Arja). "The hydrolysis of aluminium, a mass spectrometric study." Doctoral thesis, University of Oulu, 2007. http://urn.fi/urn:isbn:9789514285578.

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Abstract This thesis is focused on the hydrolysis of aluminium, the polymerisation of the hydrolysis products, and how these can be monitored by mass spectrometric methods. The main aim of this research is to figure out how the aqueous speciation of aluminium changes as a function of pH (3.2–10), concentration (1–100 mM), reaction time (1s–14d), and counter anion (Cl-, SO42-, HCOO-). The method used was electrospray mass spectrometry. The results showed more variable speciation than those suggested earlier. The main species were Al2, Al3, and Al13, which were found in all of the conditions under scrutiny. The effect of pH was the most remarkable of all the parameters researched. The formation of large highly charged complexes was strongly dependent on it. Also the Al-concentration in the bulk solution had a clear effect on speciation: in dilute solutions there were more protonated ligands and less attached counter anions. This could mean that the species in more diluted bulk solutions had fewer different states of charge. Reaction time caused only minor changes to speciation in the initial pH: there was slightly more variation of a certain sized species in the aged solution. In elevated pH, the birth of important Al13 oligomers was time dependent. The effect of the counter anion was tremendous. In a chloride environment the speciation was rich and diversified. With sulphate the speciation was limited to solid- like compounds, and the variation of single-sized species was almost lacking. The formate as a counter anion caused most surprising results; the charge of aluminium in some studied complexes was lowered from the common 3+ to 1+. If this reaction also occurs in natural circumstances, the uses of aluminium formate would be wide. The results can be utilised in following the progress of dissolution, the mobilization and toxicity of aluminium in natural waters, as well as in water purification, and in reaching minimal chemical contamination levels in sludge as well as in aqueous waste.

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WEST, BRANDI. "Characterization of Metal Nanoparticle Interactions with Small Molecules." Thesis, 2009. http://hdl.handle.net/1974/1973.

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The interaction between metal nanoparticles and small molecules has been investigated by FTIR and UV-visible absorption spectroscopy. Electrospray deposition into an argon matrix was chosen as the initial method. An electrospray metal source was tested in development stage. Both the formation of a stable corona discharge as well as a stable Taylor cone were successfully completed. Problems arose when the entire system was tested. It was determined that the vacuum was insufficient for the length of the flight path. Focus then shifted to nanoparticles in more conventional environments. Sol-gel encapsulated nanoparticles were generated, in the form of both monoliths as well as thin film coatings on silicon wafers. The gels were exposed to 1atm of carbon monoxide in a gas cell. The method encountered problems due to spectral interference from the matrix. The next attempt consisted of solution stabilized nanoparticles. The solution was exposed to various amounts of both ammonium sulphate and diethylamine. There was again the problem of solvent interference, even when attempting to observe the system using Raman spectroscopy. Finally, surface stabilized nanoparticles were generated, using 3-mercaptopropyltrimethoxysilane to adhere the particles to glass slides. While the coating was successfully applied to the glass slides, as confirmed with Raman spectroscopy, it was not possible to get the nanoparticles to adhere. Future outlook for this project is briefly reviewed.
Thesis (Master, Chemistry) -- Queen's University, 2009-06-26 10:30:58.295

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Частини книг з теми "Electrospark treatment"

Yudate, Shinji, Ryosuke Tamada, Tatsuya Takahashi, Ryotaro Ozaki, and Kazunori Kadowaki. "Timing Control of Streamer Initiation and Electrospray Generation for Waste Water Treatment." In Lecture Notes in Electrical Engineering, 193–203. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8690-0_18.

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Тези доповідей конференцій з теми "Electrospark treatment"

Koshuro, Vladimir. "Electrospark alloying of zirconium and subsequent induction heat treatment." In Saratov Fall Meeting 2018: Optical and Nano-Technologies for Biology and Medicine, edited by Valery V. Tuchin and Elina A. Genina. SPIE, 2019. http://dx.doi.org/10.1117/12.2523114.

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Ishimaru, Ryohei, Hideki Motomura, Shinji Yudata, Ryotaro Ozaki, and Kazunori Kadowaki. "Calculation of electrospray profile in multi-electrode system for plasma treatment." In 2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2021. http://dx.doi.org/10.1109/icpadm49635.2021.9493999.

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Chai, Rukuan, Yuetian Liu, Yuting He, Qianjun Liu, and Wenhuan Gu. "Experimental Study on Direct Current Voltage Assisted Carbonated Water-Flooding Mechanism in Tight Oil Reservoir." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21498-ms.

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Abstract Tight oil reservoir plays an increasingly important role in the world energy system, but its recovery is always so low. Hence, a more effective enhanced oil recovery (EOR) technology is urgently needed. Meanwhile, greenhouse effect is more and more serious, a more effective carbon capture and sequestration (CCS) method is also badly needed. Direct current voltage assisted carbonated water-flooding is a new technology that combines direct current voltage with carbonated water-flooding to enhance oil recovery and CO2 sequestration efficiency, simultaneously. Experimental studies were conducted from macroscopic-scale to microscopic-scale to study the performance and mechanism of direct current voltage assisted carbonated water-flooding. Firstly, core flood experiments were implemented to study the effect of direct current voltage assisted carbonated water on oil recovery and CO2 sequestration efficiency. Secondly, contact angle and interfacial tension/dilatational rheology were measured to analyze the effect of direct current voltage assisted carbonated water on crude oil-water-rock interaction. Thirdly, total organic carbon (TOC), gas chromatography (GC), and electrospray ionization-fourier transform ion cyclotron resonance-mass spectrometry (ESI FT ICR-MS) were used to investigate the organic composition change of produced effluents and crude oil in direct current voltage assisted carbonated water treatment. Through direct current voltage assisted carbonated water-flooding experiments, the following results can be obtained. Firstly, direct current voltage assisted carbonated waterflooding showed greater EOR capacity and CO2 sequestration efficiency than individual carbonated water and direct current voltage treatment. With the increase of direct current voltage, oil recovery increases to 38.67% at 1.6V/cm which much higher than 29.07% of carbonated water-flooding and then decreases, meanwhile, CO2 output decreases to only 35.5% at 1.6V/cm which much lower than 45.6% of carbonated water-flooding and then increases. Secondly, in direct current voltage assisted carbonated water-flooding, the wettability alteration is mainly caused by carbonated water and the effect of direct current can be neglected. While both carbonated water and direct current have evident influence on interfacial properties. Herein, with direct current voltage increasing, the interfacial tension firstly decreases and then increases, the interfacial viscoelasticity initially strengthens and then weakens. Thirdly, GC results indicated that crude oil cracking into lighter components occurs during direct current voltage assisted carbonated water-flooding, with the short-chain organic components increasing and the long-chain components decreasing. Meanwhile, TOC and ESI FT ICR-MS results illustrated that CO2 electroreduction do occur in direct current voltage assisted carbonated water-flooding with the dissolved organic molecules increases and the emergence of formic acid. Conclusively, the synergy of CO2 electrochemical reduction into formic acid in aqueous solution and the long-chain molecules electrostimulation pyrolysis into short ones in crude oil mutually resulted in the enhancement of crude oil-carbonated water interaction. This paper proposed a new EOR & CCS technology-direct current voltage assisted carbonated water-flooding. It showed great research and application potential on tight oil development and greenhouse gas control. More work needs to be done to further explore its mechanism. This paper constructs a multiscale & interdisciplinary research system to study the multidisciplinary (EOR&CCS) problem. Specifically, a series connected physical (Core displacement, Contact angle, and Interfacial tension/rheology measurements) and chemistry (TOC, GS, and ESI FT ICR-MS) experiments are combined to explore its regularity and several physics (Atomic physics) and chemistry (Electrochemistry/Inorganic Chemistry) theories are applied to explain its mechanisms.

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