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Dissertations / Theses on the topic 'Microarc oxidation'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

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1

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.

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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 к
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2

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/21915.

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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 к
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3

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

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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
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4

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.

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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
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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.

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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
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6

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.

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碩士<br>中華大學<br>機械工程學系碩士班<br>100<br>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 o
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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.

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碩士<br>龍華科技大學<br>工程技術研究所<br>97<br>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 pa
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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.

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碩士<br>龍華科技大學<br>工程技術研究所<br>99<br>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 tre
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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.

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碩士<br>龍華科技大學<br>工程技術研究所<br>100<br>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
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10

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.

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碩士<br>龍華科技大學<br>工程技術研究所<br>95<br>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 dens
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11

XU, ZHU-MIN, and 許筑旻. "Corrosion Behavior of AZ31B Pulse Microarc Oxidation and Effect of Magnesium Ion Release on Cells." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/tpjv8k.

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碩士<br>大葉大學<br>醫療器材設計與材料碩士學位學程<br>107<br>Magnesium is one of the essential elements in the human body. Magnesium alloy has good biocompatibility and degradability, and has the potential to become a temporary orthopedic implant material, providing temporary mechanical support for wound or diseased tissue healing. However, magnesium alloy implants have the problem of excessive corrosion in the human body. Therefore, in order to reduce the corrosion rate of magnesium alloy in the human body and explore the factors and biocompatibility of magnesium alloy degradation, and avoid complete degradation
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12

Chen, Chi-yuan, and 陳麒元. "The research of ZrO2/Al2O3 oxide film coated on 6061 aluminium alloy by microarc discharge oxidation." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/53043241328810904119.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>102<br>Zirconia composite coating was prepared on 6061 aluminum alloy by microarc discharge oxidation. Tthe microstructure, hardness, XRD and toughness have been investigated in this study. First, the the experiments were carried out in alkaline electrolyte containing K2ZrF6 at different negative voltage. The results indicated that it is easier to form alumina than Zirconia for MDO coating on aluminum alloy, because Zr(OH)4 partilce were formed in alkaline easily. Compare with formation of alumina MDO coating, Zr(OH)4 partilce made a lot of pores during coating and w
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13

Lin, Chi-Jung, and 林繼榮. "Study on the cavitation erosion resistance of structural materials using nano composite coating and microarc oxidation treatment." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/74946872626741505212.

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博士<br>逢甲大學<br>材料科學所<br>94<br>The generation and collapse of bubbles at the surface of a component caused by repeated sudden pressure changes of fluid, can lead to cavitation erosion. The collapsing bubbles result in the emission of shock waves and micro-jets which leads to plastic deformation, fatigue, fracture or material loss. It is hard to observe the damage of cavitation erosion until substantial material removal for a long service time. There are many surface modification technologies to improve cavitaiton erosion for structural materials today, such as thermal spray, ion nitriding and
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14

Wu, Sih-Huei, and 吳思慧. "Effect of Silver Salt in the Electrolyte on the Antibacterial Coating of Titanium Alloy by Microarc Oxidation." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/50240573259150161028.

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碩士<br>龍華科技大學<br>工程技術研究所<br>101<br>This study attempted to utilize microarc oxidation to prepare titanium oxide layer containing silver. The present paper was divided into two parts: the first part was to prepare titanium oxide layer via microarc oxidation. The second part tried to use various approaches for adhering silver to the surface of titanium oxide layer. Field Emission Scanning Electron Microscopy (SEM) was used to observe the surface morphology produced by different approaches. Energy Dispersive Spectrometer (EDS) was employed to observe surface composition, whereas Micro-Shape Analyz
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15

Yun, Huisung. "Surface Properties of Advanced Materials and Their Applications in Ballistics." Thesis, 2010. http://hdl.handle.net/1969.1/150926.

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This thesis research investigates the surface properties and performances of gold nanoparticles, microarc oxidation coating, and epitaxial nano-twinned copper film. The research aims to understand the critical behavior of material surfaces in order to facilitate design and development of new materials for tribological applications. The research will focus on improving of the gun barrel performances. Experimental approaches will be used for combining analysis with basic thermal energy transfer principles. Results obtained here will be used for developing new materials to be used in facilitating
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16

Hsu, Po-jung, and 徐栢榮. "The influence of duty ratio and frequency of pulsed bipolar microarc oxidation on the properties of the oxide ceramic coatings of 7075-T6 Al alloy." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/93071048784610851755.

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碩士<br>大同大學<br>材料工程學系(所)<br>97<br>Aluminum alloys exhibit low density, high specific strength, good wear resistance, anti-corrosion and great workability, it can be applied in wide application on commodity sector, automobile, aerospace and national defense industry. Due to the concepts of environmental consciousness and energy saving, valve metal and its alloys has increasingly used in automobile and bicycle recently. Meanwhile, aluminum is an active element easily combined with oxygen, leading to a formation of 5 nanometer inert thin film. However, the thin and uneven naturally-formed thin fil
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17

Ezhiselvi, V. "Development of Corrosion Protective Coating Systems for AZ31B Magnesium Alloy." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/3786.

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Magnesium and its alloys are extensively used for various industries such as aerospace, automobile and electronics due to their excellent properties such as low density, high strength and stiffness and electromagnetic shielding. However, the wide spread applications of these alloys are limited due to the undesirable properties such as poor corrosion, wear and creep resistance and high chemical reactivity. These alloys are highly susceptible to galvanic corrosion in sea water environment due to their high negative potential (-2.37 V vs SHE). The effective way of preventing corrosion is through
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18

Ezhiselvi, V. "Development of Corrosion Protective Coating Systems for AZ31B Magnesium Alloy." Thesis, 2016. http://etd.iisc.ernet.in/2005/3786.

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Magnesium and its alloys are extensively used for various industries such as aerospace, automobile and electronics due to their excellent properties such as low density, high strength and stiffness and electromagnetic shielding. However, the wide spread applications of these alloys are limited due to the undesirable properties such as poor corrosion, wear and creep resistance and high chemical reactivity. These alloys are highly susceptible to galvanic corrosion in sea water environment due to their high negative potential (-2.37 V vs SHE). The effective way of preventing corrosion is through
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