Relevant bibliographies by topics / Microarc oxidation

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Academic literature on the topic 'Microarc oxidation'

Author: Grafiati

Published: 30 May 2022

Last updated: 22 June 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Microarc oxidation.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Microarc oxidation"

Ma, Jie, Yuan Sheng Yang, Xiu Chun Wang, Jing Zhang, Shuo Liu, and Xi Bin Yi. "Effect of Impulse Voltage on Microstructure and Corrosion Resistance of Microarc Oxidation Coatings on AZ80 Magnesium Alloy." Key Engineering Materials 575-576 (September 2013): 418–22. http://dx.doi.org/10.4028/www.scientific.net/kem.575-576.418.

Full text

Abstract:

Microarc oxidation coating and microarc oxidation-fluorocarbon coating were prepared on the surface of AZ80 magnesium alloy profiles. The phase structure, surface morphology and corrosion resistance of the coatings were investigated using SEM, XRD, copper sulfate spot test and polarization curve test. The main phase compositions of the microarc oxidation coatings were MgO, Mg2SiO4, MgSiO3, MgF2 and MgAl2O4. With increasing pulse voltage, the oxidation coating became thicker and the microstructure of the coating surface became compact; therefore the coating corrosion resistance was improved. The oxidation coating with pulse voltage of microarc oxidation controlled between 300-438V obtained the best corrosion resistance. The corrosion current density of magnesium alloy reduced 1-3 orders of magnitude after microarc oxidation treatment with increasing pulse voltage, and the corrosion resistance of microarc oxidation-fluorocarbon coating is desirable.

APA, Harvard, Vancouver, ISO, and other styles

Shtefan, Viktoriia, Hkouka Mabila Belandre Dieuveille, Nadiia Kanunnikova, and Serhii Leshchenko. "INFLUENCE OF CURRENT DENSITY ON THE PROCESS OF FORMATION OF OXIDE COATING ON ZIRCONIUM ALLOY E110." Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies, no. 1(11) (May 18, 2022): 69–74. http://dx.doi.org/10.20998/2413-4295.2022.01.11.

Full text

Abstract:

Today, binary, triple and quadruple zirconium alloys containing iron, chromium and copper are known for corrosion protection, which have a clear advantage over circal and niobium binary alloys in terms of corrosion resistance. However, insufficient attention is paid to studies aimed at studying the process of formation and morphology of oxide films on the zirconium alloy E110. This area of research has a high scientific and technical interest in the development of oxide coatings on metal surfaces, given the widespread use of zirconium alloys in nuclear energy as a structural material in the construction of nuclear reactors. The paper considers the advantages of the method of microarc oxidation in comparison with other methods of protection of zirconium alloys from different types of corrosion damage. The main task of the work is to study the influence of current density on the formation and morphology of oxide films on zirconium alloy. It was found that the obtained dependences of the formation stress on the time of microarc oxidation of zirconium alloy in 1 mol/l potassium pyrophosphate at different current densities have a characteristic classical appearance, characterized by three sections, such as spark, spark and microarc. The dependence of the rate of change of the voltage dU / dt on the molding voltage is constructed for a more detailed study of the process of formation of oxide films and determination of the moment of the beginning of sparking and microarcs. It was found that when the current density increases to 6 A/m2, the spark voltage increases by 5 V, and when it increases to 10 A/m2 - by 15 V, but the voltage of the microarcs remains unchanged. Mostly solid, well-bonded to the base oxide films of light gray colour on a zirconium alloy are obtained. The morphology of oxide coatings obtained on the surface of the zirconium alloy E110 by the method of microarc oxidation in potassium pyrophosphate at different current densities was studied. It is shown that oxide films without cracks and surfaces have irregularities with a cellular texture.

APA, Harvard, Vancouver, ISO, and other styles

Ma, Jie, Yuan Sheng Yang, Xiu Chun Wang, et al. "Microstructure and Corrosion Resistance of Microarc Oxidation Coatings on AZ31 Magnesium Alloy Extrusion Profiles." Advanced Materials Research 557-559 (July 2012): 1993–97. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.1993.

Full text

Abstract:

Microarc oxidation coatings were prepared on the surface of AZ31 magnesium alloy profiles. Oxidation time of the coatings was between 5min-10min. The phase structure, surface morphology and corrosion resistance of the coatings were investigated using SEM, XRD, copper sulfate spot test and polarization curve test. The results indicate: the main phase compositions of the microarc oxidation coatings are MgO, Mg2SiO4 and MgSiO3; with increasing pulse voltage, the micropore diameter of the coating surface becomes larger, the micropore number reduces and the coating surface roughness increases; the corrosion current density of magnesium alloy reduces significantly after microarc oxidation treatment. The pulse voltage of microarc oxidation should be controlled between 240V-360V to obtain the best corrosion resistance.

APA, Harvard, Vancouver, ISO, and other styles

Peng, Guang Huai, Bao Jun Han, Ling Fang, Xue Feng Guo, and Xiao Lian Zhang. "Effect of Negative Pulse Voltage on the Microstructure and Corrosion Resistance of Microarc Oxidation Film of A356 Aluminum Alloy." Materials Science Forum 675-677 (February 2011): 1193–96. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.1193.

Full text

Abstract:

The effect of negative pulse voltage on the microstructure and corrosion resistance of microarc oxidation film of A356 aluminum alloy treated by microarc technique was investigated by SEM, coating thickness gauge and electrochemical workstation etc. The results show the negative pulse voltage greatly influences the microstructure and corrosion resistance of microarc oxidation film by its electrode reaction. The film thickness increases while the size of pore and roughness of the film surface decreases initially and then increases with negative pulse voltage increasing. The microarc oxidation treatment considerably improved corrosion resistance, and the highest corrosion potential was -1.16V, which was 0.38V higher than that of substrate, and the corrosion current was lower than that of substrate about three orders of magnitude.

APA, Harvard, Vancouver, ISO, and other styles

Zhassulan, A. Zh, Zh B. Sagdoldina, E. M. Mukhametov, K. D. Ormanbekov, and A. B. Shynarbek. "Calcium-phosphate coatings obtained by microarc oxidation (review)." Bulletin of Shakarim University. Technical Sciences, no. 2(10) (June 30, 2023): 12–22. http://dx.doi.org/10.53360/2788-7995-2023-2(10)-2.

Full text

Abstract:

This literature review examines the topic of microarc oxidation of calcium phosphate coatings, which has received considerable attention in recent years due to its potential application in biomedical and engineering fields. The advantages of the microarc oxidation method for obtaining protective coatings are described. The main attention is paid to the formation of coatings under various modes of the microarc oxidation process and with the help of electrolytes containing suspended powders of various elements and concentrations. The review examines various aspects of the technology, including the underlying principles, the types of coatings that can be obtained, and the methods used to determine the characteristics. In addition, the review examines the potential applications of microarc oxidation in calcium phosphate coatings in various fields, such as biomedical implants, aerospace components and tissue engineering. It discusses the advantages of coatings, such as improved osseointegration, corrosion resistance and wear protection, as well as the potential for the inclusion of bioactive molecules in coatings to further improve their performance. Overall, the review concluded that calcium phosphate coatings have great potential for various applications, but further research is needed to fully understand the potential of this innovative technology and optimize its performance for specific applications.

APA, Harvard, Vancouver, ISO, and other styles

Akhmedova, Z. R., A. I. Komarov, T. E. Shonakhunov, et al. "Structure and Properties of Solid Aluminum Oxide Nanocomposites – a Promising Sorbent for Immobilization of Biometabolites and Microorganisms." Ecology and Industry of Russia 29, no. 5 (2025): 19–25. https://doi.org/10.18412/1816-0395-2025-5-19-25.

Full text

Abstract:

The data on investigation of oxide-ceramic coating formed by microarc oxidation of porous samples from aluminum alloys of different chemical composition (AK15, AMg6, D16) are presented. The microstructure of the obtained composites, pore size distribution, macrostructure of the surface of porous aluminum samples before and after microarc oxidation, phase and elemental composition were studied. It is shown that microarc oxidation leads to the formation of a composite coating consisting of various forms of aluminum oxide (α-, γ-Al2O3) and mullite 3Al2O3·2SiO2. It is noted that the obtained oxide compounds of aluminum and silicon can serve as the basis of sorbents for immobilization of chemical and biological substances with different molecular weights, as well as cells of microorganisms, in particular Escherichia coli.

APA, Harvard, Vancouver, ISO, and other styles

Rakoch, A. G., and I. V. Bardin. "Microarc oxidation of light alloys." Metallurgist 54, no. 5-6 (2010): 378–83. http://dx.doi.org/10.1007/s11015-010-9309-y.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Pecherskaya, E. A., A. D. Semenov, and P. E. Golubkov. "Simulation of electrical parameters of a galvanic cell in the process of microarc oxidation." Frontier materials & technologies, no. 4 (2023): 73–85. http://dx.doi.org/10.18323/2782-4039-2023-4-66-7.

Full text

Abstract:

Microarc oxidation is a promising technology for producing wear-resistant anticorrosive coatings for goods made of valve metals and alloys and is used in many industries. One of the main problems of this technology is low controllability caused by the complexity and interconnectedness of physical and chemical phenomena occurring during the coating process. To solve such problems, digital twins are currently actively used. The paper covers the development of mathematical models that are advisable to use as structural elements of the digital twin of the microarc oxidation process. An equivalent electrical circuit of a galvanic cell of microarc oxidation is given, which takes into account the electrolyte resistance, the part coating resistance in the form of a parallel connection of nonlinear active resistance and capacitive reactance. The authors propose a mathematical model describing the behavior of the equivalent electrical circuit of a galvanic cell of microarc oxidation. A technique for determining the parameters of this model was developed, including the construction of a waveform of changes in the resistance of the cell and its approximation, estimation of the values of resistances and capacitance of the galvanic cell equivalent circuit. The authors proposed a calculation method and developed a Simulink model of the microarc oxidation process, which allows simulating the current and voltage waveforms of a galvanic cell. The analysis of the model showed that the model is stable, controllable and observable, but poorly conditioned, which leads to modelling errors, the maximum value of which is 7 % for voltage and 10 % for current. By the parametric identification method using experimental current and voltage waveforms, the dependences of the parameters of the galvanic cell equivalent circuit on the oxidation time are obtained. It is found that the change in the period average of the galvanic cell active resistance correlates with the coating thickness.

APA, Harvard, Vancouver, ISO, and other styles

Malyshev, V. N., A. M. Volkhin, and B. M. Gantimirov. "Tribological Characteristics Improvement of Wear Resistant MAO-Coatings." Journal of Coatings 2013 (June 19, 2013): 1–5. http://dx.doi.org/10.1155/2013/262310.

Full text

Abstract:

Currently, the most promising technology of coating formation is microarc oxidation (MAO) with unique properties of the surface layer, which combine high wear resistance, corrosion resistance, and heat and erosion resistance. Microarc oxidation can be used for parts and components manufacturing in various segments of industries. However, the technology improvement by improving the tribological characteristics of MAO-coatings can not only enhance economic effect, but also expand its application.

APA, Harvard, Vancouver, ISO, and other styles

Kuleshkov, Yuriy, Mykhailo Krasota, Timofey Rudenko, Ruslan Osin, and V. Kroshka. "Strengthening of Aluminum Alloy Parts by Micro-Arc Oxidation." Central Ukrainian Scientific Bulletin. Technical Sciences, no. 4(35) (2021): 44–53. http://dx.doi.org/10.32515/2664-262x.2021.4(35).44-53.

Full text

Abstract:

The purpose of the research is to analyze the scientific and technical information to determine the possibility of strengthening the parts of aluminum alloys by microarc oxidation, in particular gear pump housings. The article presents the results of the analysis of possibility of using a new method of hardening roboczych surfaces - micro-arc oxidation to enhance the wear resistance of working surfaces of parts made of aluminum alloys, in particular housings, gear pumps NSH. The paper describes the essence of the process of hardening parts by microarc oxidation, presents the main physical and mechanical characteristics of the hardening coating. It is noted that the adhesion strength and mechanical properties of the coating largely depend on the state of the surface to be strengthened, in particular, on the method of pretreatment. At the same time, it was found that the strengthening coating of the metal after plastic deformation has a greater adhesion strength, greater thickness and hardness. The paper presents the basic information about microarc oxidation, which, according to the authors, will contribute to the development of the method in the poorly studied method of hardening in repair production. It can be concluded that the ceramic coatings obtained by microarc oxidation can be recommended for the restoration and strengthening of aluminum parts of gear pumps, in particular the pump housing.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Microarc oxidation"

Смирнова, Олександра Юріївна. "Удосконалення технології формування оксидних шарів на сплаві титану ОТ4–0". Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21923.

Full text

Abstract:

Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.17.03 – технічна електрохімія. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2016 р. Дисертація присвячена удосконаленню технології оксидування сплаву титану ОТ4–0 для створення матеріалів з протикорозійними та каталітичними властивостями. Обґрунтовано склад електролітів і експериментально визначено вплив режимів оксидування на склад, морфологію та властивості оксидних покриттів. Розроблено технологію мікродугового оксидування сплаву титану ОТ4–0 для одержання оксидних композицій Ti/TiOx∙CeOy, Ti/TiOx∙CeOy∙ZrOz, Ti/TiOx∙CeOy∙ZrOz∙CuOn. Експериментально встановлено, що церійвмісні оксидні шари виявляють високу каталітичну активність у реакціях окиснення бензолу та конверсії СО, а введення іонів міді та цирконію у церійвмісні МДО- покриття знижує температуру конверсії СО. Запропоновано склади електролітів для формування цирконій- та молібденвмісних оксидних покриттів із підвищеною термостійкістю. Визначено корозійну стійкість синтезованих матеріалів та їх каталітичну активність в модельній реакції конверсії монооксиду карбону та бензолу. Thesis for granting the Degree of Candidate of Technical sciences in speciality 05.17.03 – Technical Electrochemistry. – National Technical University "Kharkiv Politechnical Institute", 2016. The thesis is dedicated to improvement of titanium alloy ОТ4–0 oxidizing technology for the creation of materials with anticorrosive and catalytic properties. The electrolytes composition and oxidation mode influence on the oxide coating composition, morphology and properties was established. The technology of titanium alloy ОТ4–0 microarc oxidation, the oxide composition Ti/TiOx∙CeOy, Ti/TiOx∙CeOy∙ZrOz, Ti/TiOx∙CeOy∙ZrOz∙CuOn synthesis was developed. The cerium-containing oxide layers show high catalytic activity in oxidation benzene and monoxide carbon; insertion cuprum and zirconium ions in cerium-containing oxide layers decrease monoxide carbon conversion temperature experimentally established. The electrolytes composition for zirconium- and molybdenum-containing thermostable oxide coatings synthesis is proposed. The synthesized materials corrosion resistance and catalytic activity in the model reaction of carbon monoxide conversion were determined.

APA, Harvard, Vancouver, ISO, and other styles

Full text

Abstract:

APA, Harvard, Vancouver, ISO, and other styles

Batista, Luciana. "MicroRNAs and oxidative stress : mechanisms of regulation and impact on tumorigenesis." Paris 7, 2013. http://www.theses.fr/2013PA077168.

Full text

Abstract:

Les microARNs (miRNAs) sont des régulateurs majeurs de l'expression génique et ont été impliqués dans un grand nombre de processus biologiques et pathologies, dont le cancer. Le stress oxydant est une accumulation des espèces réactives de l'oxygène et génère une réponse cellulaire dans laquelle le miRNAs peuvent jouer un rôle important. Dans cette étude nous nous intéressons au rôle et à la régulation des miRNAs de la famille miR-200 (miR-141, 200a, 200b, 200c and 429) qui accumulent en réponse au stress oxydant. Dans la première partie, nous invetiguons la fonction de miR-141 et 200a dans la tumorigénèse et la réponse au stress oxydant. Nous montrons que ces miRNAs ciblent une protéine clé de cette réponse, la p38alpha. Ils sont pro-tumorigènes mais leur surexpression augmentent la sensibilité à la chimiothrapie. Dans les tumeurs ovariennes humaines, l'expression du miR-200a est associée à une signature de Stress oxydant, ce qui corrèle avec une meilleure survie des patientes. La deuxième partie est dédiée à l'étude de deux miRNAs issus d'un même locus génomique, miR-200c et 141. Nous démontrons que leur transcription est associée à celle du gène localisé en amont, PTPN6. Nous proposons deux mécanismes originaux de co-régulation de ces gènes. Le premier est que la transcription de PTPN6 ne s'arrête pas à son site de polyadénylation, mais continue jusqu'aux miRNAs. Le deuxième mécanisme est l'association physique entre les deux promoteurs à travers une boucle de l'ADN, mis en évidence par des expériences de 3C (Chromosome Conformation Capture) MicroRNAs (miRNAs) are key regulators of gene expression and habe been implicated in a vast number of biological processes and pathologies, including cancer. Oxidative stress is generated by an accumulation of reactive oxygen species and elicits a cellular response in which miRNAs can play an important role. By investigating miRNAs affected by oxidative stress, we identified the miR-200 family of miRNAs (miR-141, 200a, 200b, 200c and 429) and studied their function and regulation. In the first part, we investigated the miR-141 and 200a function in oxidative stress response and their impact on tumorigenesis. We showed that they directly target a key stress sensor, the p38alpha. These miRNAs are pro-tumorigenic but their overexpression in xenografted tumors lead to an increased sensitivity to paclitaxel chemotherapy. In an human ovarian cancers, miR-200a expression is associated with an Oxidative Stress signature, which correlates with a better clinical outcome. These findings have potential future clinical applications in prediction and treatment of ovarian cancer. The second part is focused on two genetically clustered miRNAs, miR-200c and 141, which are co-upregulated upon oxidative stress. We demonstrated that their transcription is intimately associated to this one of the upstream gene, PTPN6. We propose two original mechanisms for the tight co-regulation of these genes. The first is a transcriptional read-through of the PTPN6 polyadenylation site leading to the transcription of the downstream miRNAs. The second mechanism, supported by our 3C (Chromosome Conformation Capture) experiments, is a physical interaction between the two promoters by a DNA-loop

APA, Harvard, Vancouver, ISO, and other styles

Barbier, Emeline. "Étude des mécanismes physiopathologiques impliqués dans la toxicité des particules ultrafines chez un modèle murin : une approche multi-organes." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILS063.

Full text

Abstract:

Bien qu'une diminution conséquente de la pollution atmosphérique soit constatée depuis les années 1990, cette dernière demeure un problème de santé publique majeur, à l'origine de plus de 4,2 millions de décès prématurés par an dans le monde. À l'heure actuelle, l'attention des experts se concentre sur les particules ultrafines (PM0,1 ou PUF) en raison de leur capacité à transloquer dans la circulation systémique pour atteindre les organes périphériques où elles seront alors susceptibles d'avoir un impact néfaste. Néanmoins, les connaissances en termes de mécanismes cellulaires et moléculaires impliqués dans la toxicité de ces particules restent encore très parcellaires et demeurent, le plus souvent, centrées sur leur cible principale qu'est le poumon. Ainsi, ce projet de thèse avait pour objectifs principaux d'apporter des éléments novateurs sur la toxicocinétique (i.e., distribution/persistance) et la toxicodynamique (i.e., mécanismes physiopathologiques, voies de signalisation associées) de PUF prélevées en milieu urbain, d'une part, et les effets organo-spécifiques des PUF et l'utilisation des miARN circulants comme indicateurs d'exposition chronique et/ou cumulées aux PUF dans un modèle murin, d'autre part. Afin de répondre à ces interrogations, des souris Balb/cJRj ont été exposées durant 3 mois à différentes doses de PUF prélevées dans la zone urbaine de Lille, puis des analyses ont été réalisés au sein de différents organes-cibles richement vascularisés, et par conséquent directement exposés aux PUF lors de leur phase de translocation et de distribution systémique. Les résultats obtenus ont démontré que, dans l'ensemble des organes cibles, le potentiel oxydant intrinsèque des PUF induisait indéniablement la production d'espèces pro-oxydantes et l'activation de défenses antioxydantes en quantité suffisante pour rétablir un état d'homéostasie redox mais ne parvenant pas, cependant, à éviter l'apparition d'une réponse inflammatoire au niveau pulmonaire, cardiaque et cérébral. Des approches transcriptomiques réalisés au sein des poumons, organes cibles présentant les effets délétères les plus marqués, ont suggéré la dérégulation de nombreuses voies de signalisation en relation avec les réponses oxydante et inflammatoire, qui constituent les mécanismes centraux de toxicité des PUF mais aussi avec des mécanismes de toxicité plus originaux tels que la dysfonction mitochondriale, la transition épithélio-mésenchymateuse et le remodelage tissulaire, dont la modulation a également été validée d'un point de vue fonctionnel. Ces données prometteuses pourraient à terme contribuer à une meilleure prise de décision quant à la réduction des émissions des PUF de même qu'à la réactualisation des normes réglementaires actuellement en vigueur Although there has been a significant reduction in air pollution since the 1990s, it remains a major public health problem, responsible for over 4.2 million premature deaths worldwide every year. At present, experts' attention is focused on ultrafine particles (PM0.1 or UFP) because of their ability to translocate into the systemic circulation and reach peripheral organs, where they are likely to have a harmful impact. Nevertheless, the knowledge of the cellular and molecular mechanisms involved in the toxicity of these particles is still very patchy, and most often remains focused on their main target, the lung. Thus, the main objectives of this thesis project were to provide innovative insights into the toxicokinetics (i.e., distribution/persistence) and toxicodynamics (i.e., pathophysiological mechanisms, associated cell signaling pathways) of UFP collected in urban environments, on the one hand, and the organospecific effects of UFP and the use of circulating miRNA as indicators of chronic and/or cumulative exposure to UFP in a mouse model, on the other hand. To answer these questions, Balb/cJRj mice were exposed for 3 months to various doses of UFP collected in the urban area of Lille, then analyzed in various target organs richly vascularized, and therefore directly exposed to UFP during their translocation and systemic distribution phase. The results showed that, in all target organs, the intrinsic oxidative potential of UFP undeniably induced the production of oxidative oxygen species and the activation of antioxidant defenses in sufficient quantities to restore a state of redox homeostasis, but were unable to prevent the onset of an inflammatory response in the lungs, heart and brain. Transcriptomic approaches carried out in the lungs, the target organ with the most marked deleterious effects, have suggested the deregulation of numerous signaling pathways in relation to oxidative and inflammatory responses, which constitute the central mechanisms of UFP toxicity, but also with more original toxicity mechanisms such as mitochondrial dysfunction, epithelial-mesenchymal transition and tissue remodeling, whose modulation has also been validated from a functional point of view. These promising data could ultimately contribute to better decision-making on the reduction of UFP emissions, as well as to the updating of current regulatory standards

APA, Harvard, Vancouver, ISO, and other styles

Heliot, Amélie. "Étude de la réponse cellulaire et des Vésicules Extracellulaires produites par des macrophages primaires exposés aux particules fines (PM₂.₅)." Thesis, Littoral, 2018. http://www.theses.fr/2018DUNK0522.

Full text

Abstract:

La pollution atmosphérique est un problème de santé publique. En 2013, le Centre International de Recherche sur le Cancer a classé la pollution de l'air, ainsi que les particules fines (PM₂.₅), de taille inférieure à 2,5 µm, comme cancérogène de groupe I pour l'homme. Les PM₂.₅ ont la capacité de pénétrer en profondeur dans l'appareil respiratoire. En se déposant au niveau des alvéoles pulmonaires, elles entraînent une réponse inflammatoire importante notamment via la libération de médiateurs de l'inflammation et des vésicules extracellulaires (EV) par les cellules immunitaires infiltrantes ou résidentes. Dans ce contexte, ce projet de thèse comportait deux objectifs majeurs : i) déterminer les caractéristiques chimiques des PM₂.₅ collectées en milieu industrialo-urbain, en identifier les origines et la variabilité saisonnière de leur composition chimique ; ii) étudier la réponse et les EV produites par les macrophages suite à l'exposition aux PM₂.₅ et observer les effets des EV sur les cellules pulmonaires.Pour cela, des macrophages primaires ont été exposés aux PM₂.₅ prélevées à Dunkerque et leur réponse cellulaire (stress oxydant, inflammation, polarisation, miARN) a été mesurée. Les EV produites en réponse à cette exposition ont été isolées et caractérisées. Enfin, des cellules épithéliales pulmonaires, les BEAS-2B, ont été exposées aux EV libérées en réponse à l'exposition aux PM₂.₅ et les effets de cette exposition (inflammatoire, stress oxydant, miARN) ont été mesurés. Nous avons mis en évidence une inflammation et une réponse anti-oxydante dans les macrophages, ainsi qu'une modification de leur polarisation. Les PM₂.₅ entrainent une libération plus importante d'EV Air pollution is a major public health problem. In 2013, The International Agency for Research on Cancer classified air pollution and fine particle (PM₂.₅), with size lower than 2.5 µm, as carcinogenic to humans (group I). PM₂.₅ are able to penetrate deeply in lungs. When PM₂.₅ settle in pulmonary alveolar, they lead to strong inflammatory response, with inflammatory mediators ans extracellular vesicles release by infiltrating or resident immune cells. In this context, this thesis included two major aims : i) evaluate the physico-chemical characteristics of PM₂.₅ sampled in an industrial-urban site, identify their origin and study the seasonal variability of their composition ; ii) investigate the cellular response and EV produced by macrophages in response to PM₂.₅ and study EV's effects on epithelial cells. To achieve this, macrophages are exposed to PM₂.₅ collected in Dunkerque, and cellular response (oxidative stress, inflammation, polarization, miRNA) was quantified. EV released in response to PM₂.₅ exposition was isolated and characterized. Finally, epithelial cells, BEAS-2B, are exposed to EV released by exposed and non exposed macrophages to evaluate effects from this exposure (inflammation, oxidative stress, miRNA). We observed inflammation and anti-oxidant response in macrophages after PM₂.₅ exposure, as well as polarization modification. PM₂.₅ lead to increased number of EV by macrophages

APA, Harvard, Vancouver, ISO, and other styles

Liu, Shih-Jui, and 劉時瑞. "The Effect of Additives on Microstructure of Microarc Oxidation Films on Aluminum Alloys." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/90461207744568171741.

Full text

Abstract:

碩士 中華大學 機械工程學系碩士班 100 Microarc oxidation (MAO) is an electrochemical surface treatment process for generating oxide coatings on metals. It involves the modification of a conventional anodically grown oxide film by the application of an electric field greater than the dielectric breakdown field for the oxide. This process has been widely used to grow thick oxide layer on aluminum which can offer protection against wear and corrosion. This study investigates the effects of adding graphite and nano-diamond powders into the electrolyte solution on structure and thermal properties of grown aluminum oxides by MAO process. The 6061 aluminum alloy was used as the substrate material and pulsed DC power supply was utilized to grow oxide layer. The results show that Al4C3, Al4O4C and Al2O3 are the main phases in grown layer when graphite particles are added into the electrolyte solution. The addition of graphite particles into the electrolyte solution significantly increases the thermal emissivity and hence decreases the heat spreading resistance of the grown layers. In the case of using nano-diamond particles as the additives, only diamond, Al2OC and Al2O3 phases are observed in the grown layer. The measured heat spreading resistance decreased obviously, which can be attributed to the high thermal conductivity of diamond particles trapped inside the coatings.

APA, Harvard, Vancouver, ISO, and other styles

Tsai, Hun-Hui, and 蔡弘輝. "Effect of electrolytic solution with different ceramic particles by microarc oxidation on aluminum alloy." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/21997162280506729992.

Full text

Abstract:

碩士 龍華科技大學 工程技術研究所 97 Aiuminum alloy has been widely used in the industry because the characteristic of light mass and easy manufacturing for complicated components. Byuse of micro-arc oxidation (MAO) method, producing an oxidized ceramics coating on the surface of aluminum alloy substrate can enhance the hardness and corrosion resistance of the surface. This study aims to improve the substrate’s properties further by adding insoluble particle in the electrolyte separately. The results of hardness and corrosion resistance of the ceramic coating both show that the addition of AlO3 particles is superior to that of TiO2,or SiC and the hardnwss of the ceramic coating may reach to 1248 Hv. Add SiC particles has the best of the corrosion resistance. The particles can be added to decrease the roughness of ceramic coatings.

APA, Harvard, Vancouver, ISO, and other styles

Tsai, Wei-ting, and 蔡維庭. "Fabrication of Hydroxyapatite on the Microarc Oxidation Ceramic Coating of Titanium and its Alloy." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/20091608509132390809.

Full text

Abstract:

碩士 龍華科技大學 工程技術研究所 99 With different methods, this study aims to fabricate hydroxyapatite on the titanium and its alloy surface by use of microarc oxidation treatment. The paper is composed of two parts. The first part is that RF magnetron sputtering technology and self-made targets were used to produce hydroxylapatite covering the surface of titanium and its alloy. The second part is that a coating containing rich calcium and phosphorus composition was formed on the surface of titanium and its alloy by means of Ca2+, PO43-ions added in the electrolyte; and then, the surface was treated with a hydrothermal method in order to obtain rich content of hydroxylapatite. The study also aims to prepare the titanium and its alloy with better corrosion resistance, hydrophilic property and biologically active structure. The corrosion resistance of oxide coating was analyzed by Electrochemical Impedance Spectroscopy (EIS). Hydrophilic property was investigated by water contact angle. Furthermore, the morphology, microstructure, chemical composition and phase structures of coating were studied by FSEM-EDS and XRD. Surface roughness and thickness were examined by micro-shape analyzer (α-step) analysis. In addition, the MTT assay was used to explore the cell proliferation rate. The first part of the study shows that the surface made from the RF magnetron sputtering treatment has amorphous hydroxyapatite structure. Moreover, its cell proliferation is worse than that of the secondary part; however, it is still superior to the surface of substrate. More importantly, the surface obtained from the second part appears better hydrophilic property, richer calcium and phosphorus content, favored surface roughness and higher cell proliferation.

APA, Harvard, Vancouver, ISO, and other styles

Huang, Wan-ting, and 黃婉婷. "Electroless copper with sodium hypophosphiteas as reductant on the surface of microarc oxidation coating." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/49362710918917328516.

Full text

Abstract:

碩士 龍華科技大學 工程技術研究所 100 This study proposes the micro-arc oxidation and electroless copper plating two methods, the formation of a new process - micro-arc oxidation of direct copper plating process (Micro-the arc Oxidation Direct Plate Copper MAODPC) to improve the thermal resistance of the LED radiating ceramic substrate. The results of this technique can be applied to the ceramic printed circuit boards, multi-chip packaging,microelectronics and precision machinery manufacturing industry, and even anti-electromagnetic interference (EMI), so the implementation of this plan can expand the application fields of micro-arc oxidation film.technology to upgrade traditional industries, increase competitiveness and foreign. This study is divided into two parts: the first part of the current density 2、4、6、8、10 A/dm2 micro-arc oxidation, and then use the best conditions for the micro-arc oxidation ceramic layers of Electroless Copper Plating. The second part to replace commonly used in the past industrial formaldehyde as a reducing agent, the Taguchi method (hereinafter referred to as the Taguchi method) to change the operating conditions of temperature, time, copper sulfate concentration and pH of the electroless copper plating using sodium hypophosphite. The first part of the study results show that the know: According to the micro-arc oxidation film thickness, roughness and micro-arc oxidation surface electroless copper plating thickness to select current density 4A/dm2, electroless copper plating was better. The second part of the study results show that: at 85°C, CuSO4‧5H2O 6g / L, 60min, pH5 - conditions, the availability of thick copper film 22μm, and the measured resistance value of 5.8 × 10-4Ω‧cm. The results of the study to overcome the micro-arc ceramic layer resistive and ceramic layer and the copper bonding problems, the successful preparation of the three-layer structure of aluminum alloy - ceramic - metal copper.

APA, Harvard, Vancouver, ISO, and other styles

Tseng, Kuo-Hang, and 曾國輝. "The study of ceramic coatings on aluminum alloy fabricated by DC microarc oxidation (MAO) technology." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/54698966941529063266.

Full text

Abstract:

碩士 龍華科技大學 工程技術研究所 95 Aluminum alloy has been widely used in the industry because the characteristic of light mass and easy manufacturing for complicated components. By use of microarc oxidation (MAO) method, this study produces an oxidized ceramics coating on the surface of aluminum alloy substrate. The objective aims to enhance the hardness and corrosion resistance of the aluminum alloy substrate. This study divides into theoretical and applicable parts: the theoretical results indicate that the α-Al2O3 content and hardness of the ceramic coating are increase with the current density. The results of AC impedance method and polarization curve both show that the corrosion resistance of the ceramic coating is superior to the substrate at different current density and the corrosion rate may be retarded to three orders or more. The applied results indicate the optimal operational condition by use of Taguchi experimental plan: sodium tungstate concentration 8g/L, TiO2 0.5g/L, current density 7A/dm2 and reaction time 60min. Furthermore, the optimal hardness of the ceramic coating may reach to 1380 Hv.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Microarc oxidation"

author, Fang Zhigang, and Jiang Bailing author, eds. Wei hu yang hua ji shu ji qi zai hai yang huan jing zhong de ying yong: Microarc oxidation technology and its applications in sea environments. Guo fang gong ye chu ban she, 2010.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Microarc oxidation"

Liu, Wan Hui, Ai Lian Bao, Xin Yu Mao, and Guang Hai Zheng. "Microstructure and Properties of Microarc Oxidation Ceramic Coatings on Aluminum Alloy." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-456-1.1895.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Xue, Wen Bin, Xiao Ling Wu, Jian Cheng Du, Xi Jin Li, and Hua Tian. "Structure and Properties of Microarc Oxidation Films on Zinc-Containing Aluminum Alloy." In Materials Science Forum. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-432-4.1145.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Zhao, Hui, Ji Chen, and Zhen Liu. "Microstructure and Mechanical Properties of Ceramic Coating on AM50 Magnesium Alloy by Microarc Oxidation." In Materials Science Forum. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-968-7.693.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Wang, Ya Ming, Ting Quan Lei, De Chang Jia, Yu Zhou, and Jia Hu Ouyang. "Microstructure and Dry Sliding Tribological Behavior of Microarc Oxidation Coating Formed on Ti6Al4V against Steel." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.1734.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Li, Xi Jin, Wen Bin Xue, Xiao Ling Wu, Guo An Cheng, and Rui Ting Zheng. "Microarc Oxidation Coatings Fabricated on Ti₃Al-Based Alloy in Silicate Electrolyte." In Materials Science Forum. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-432-4.1769.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Yuan, Quan, Zhen Tan, Ping Gong, et al. "The Effect of Microarc Oxidation Ceramic Coating on Sensory Reconstruction around Implants Using Cultured Schwann Cells." In Advanced Biomaterials VII. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-436-7.697.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Chen, Fei, Hai Zhou, Chen Chen, Fan Xiu Lu, and Fan Xiu Lu. "Study On the Corrosion Resistance Properties of the Ceramic Coating Obtained Through Microarc Oxidation on the Aluminium Alloy Surface." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-456-1.1733.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Wang, Y. Q., Ming Yi Zheng, and Kun Wu. "Characterization of Wear and Corrosion Protective Coatings Formed on AZ91 Magnesium Alloy and SiCw/AZ91 Magnesium Matrix Composite by Microarc Oxidation." In Materials Science Forum. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-968-7.823.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Wu, Kun, Y. Q. Wang, and Ming Yi Zheng. "Growth and Microstructure of Microarc Oxidation Coating on Al₁₈B₄w/AZ91 Mg Matrix Composite." In Materials Science Forum. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-432-4.543.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Bashkov, Oleg V., Fegnuan Bao, Xuewei Li, and Tatiana I. Bashkova. "Investigation of the Influence of Electrical Modes on the Morphology and Properties of Oxide Coatings on Aluminum Alloy 1163, Obtained by the Microarc Oxidation." In Current Problems and Ways of Industry Development: Equipment and Technologies. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69421-0_10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Microarc oxidation"

Yue Li, Hanhua Wu, Jiafu Wang, Genyu Chen, and Songnan Yu. "Microarc oxidation power supply based on automatically control." In 2011 3rd International Conference on Advanced Computer Control (ICACC). IEEE, 2011. http://dx.doi.org/10.1109/icacc.2011.6016371.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Golubkov, P. E., E. A. Pecherskaya, I. I. Kochegarov, M. I. Safronov, and J. V. Shepeleva. "Simulation of Microarc Oxidation Process Based on Equivalent Electric Circuit." In 2019 XXII International Conference on Soft Computing and Measurements (SCM). IEEE, 2019. http://dx.doi.org/10.1109/scm.2019.8903897.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Novikov, V. V., O. O. Novikova, and A. N. Bolotov. "Formation of diamond-containing ceramic abrasive material by microarc oxidation." In PROCEEDINGS INTERNATIONAL CONFERENCE “PROBLEMS OF APPLIED MECHANICS”. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0047434.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Li, Song, Jingshan Jiao, Lei Ming, Jixin Yin, and Xiujuan Liu. "Corrosion resistance properties of microarc oxidation coatings on magnesium alloys." In 2012 2nd International Conference on Applied Robotics for the Power Industry (CARPI 2012). IEEE, 2012. http://dx.doi.org/10.1109/carpi.2012.6356304.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Zhongcai, Shao, Jiang Haitao, Wei Shouqian, Li Xiaodan, and Zhai Yuchun. "Photocatalytic properties of TiO2 thin films prepared by microarc oxidation." In 2011 International Conference on Consumer Electronics, Communications and Networks (CECNet). IEEE, 2011. http://dx.doi.org/10.1109/cecnet.2011.5768415.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Golubkov, Pavel, Ekaterina Pecherskaya, Timur Zinchenko, Vladimir Alexandrov, and Gennadiy Kozlov. "On the issue of modeling the process of microarc oxidation." In II INTERNATIONAL SCIENTIFIC AND PRACTICAL SYMPOSIUM “MATERIALS SCIENCE AND TECHNOLOGY” (MST-II-2022). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0162996.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Komarova, E. G., M. B. Sedelnikova, Y. P. Sharkeev, M. V. Chaikina, and E. A. Kazanceva. "Lanthanum- and silicon-incorporated calcium phosphate coatings formed by microarc oxidation." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2017 (AMHS’17). Author(s), 2017. http://dx.doi.org/10.1063/1.5013768.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Rozhkova, Natatlia N., Anna A. Kovalchuk, Sergey S. Rozhkov, et al. "Structural rearrangements of Shungite-carbon nanoparticles under microarc oxidation of aluminum alloys." In INTERNATIONAL CONFERENCE ON CONTEMPORARY CHALLENGES IN SCIENCE, ENGINEERING AND ITS APPLICATIONS – Part II: IC3SEA 2023. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0230202.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Zhao Yufeng, Yang Shiyan, and Yang Wei. "Design of microarc oxidation supply and study of switching losses and positive snubber." In 2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM). IEEE, 2008. http://dx.doi.org/10.1109/speedham.2008.4581192.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Sharkeev, Yu P., M. B. Sedelnikova, E. G. Komarova, and I. A. Khlusov. "Titanium surface modification by microarc oxidation in electrolyte based on wollastonite and hydroxyapatite." In NEW OPERATIONAL TECHNOLOGIES (NEWOT’2015): Proceedings of the 5th International Scientific Conference «New Operational Technologies». AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4936053.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

Contents

Academic literature on the topic 'Microarc oxidation'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Journal articles on the topic "Microarc oxidation"

Dissertations / Theses on the topic "Microarc oxidation"

Books on the topic "Microarc oxidation"

Book chapters on the topic "Microarc oxidation"

Conference papers on the topic "Microarc oxidation"