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Dissertations / Theses on the topic 'Micro-arc oxidation coatings'

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Published: 3 June 2025

Last updated: 31 July 2025

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1

Погребняк, Олександр Дмитрович, Александр Дмитриевич Погребняк, Oleksandr Dmytrovych Pohrebniak, et al. "Structure, Properties and Element Composition of Alumina Coatings, Obtained by Micro-Arc Oxidation Method." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/34914.

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Coatings of aluminium oxide Al2O3 were obtained by micro-arc oxidation under different conditions of deposition. They were analysed by such methods as: positron annihilation spectroscopy (PAS), Rutherford backscattering (RBS), X-ray diffraction (XRD) and scanning electron microscopy with microanalysis (SEM with EDS). Investigated samples showed good adhesion to the substrate, low concentration of nanopores in the bulk. Content of amorphous phase in the coating was about 20 vol.%, and metastable -Al2O3 - Al2O3 phases about less than 10 vol.%. It was demonstrated that by varying of paramete

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Ibrahim, Hamdy Ibrahim. "Bioresorbable Magnesium-Based Bone Fixation Hardware: Alloy Design, Post-Fabrication Heat Treatment, Coating, and Modeling." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1503678544356525.

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Marques, Isabella da Silva Vieira 1986. "Filmes bioativos produzidos em superfícies de titânio por meio da técnica de oxidação por micro-arcos para aplicações odontológicas = análises de corrosão, tribocorrosão e respostas biológicas = Bioactive coatings produced on titanium surfaces by micro-arc oxidation for dental applications : corrosion, tribocorrosion and biological responses." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290198.

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Orientadores: Valentim Adelino Ricardo Barão, Marcelo Ferraz Mesquita<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-28T12:24:30Z (GMT). No. of bitstreams: 1 Marques_IsabelladaSilvaVieira_D.pdf: 24629139 bytes, checksum: 93af53e93902515d3f0381ed77a7414c (MD5) Previous issue date: 2015<br>Resumo: O titânio (Ti) e suas ligas são comumente utilizados em aplicações odontológicas. Na cavidade bucal, os implantes dentários são submetidos a tribocorrosão (interação sinérgica entre desgaste e corrosão), o que pod

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Dehghanghadikolaei, Amir. "Enhance its Corrosion Behavior of Additively Manufactured NiTi by Micro-Arc Oxidation Coating." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1525475381922659.

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Роп'як, Любомир Ярославович. "Науково-технологічні основи виготовлення деталей та складання виробів, зміцнюваних мікродуговим оксидуванням алюмінієвого шару". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/38356.

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Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.02.08 – технологія машинобудування. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2018. У дисертаційній роботі вирішена актуальна науково-технічна проблема в об-ласті технології машинобудування: розроблено теоретичні основи та технологічні засоби для підвищення ресурсу роботи нафтогазового обладнання шляхом мікродугового оксидування поверхневого алюмінієвого шару деталей машин. Досліджено напружений стан двошарового покриття під довільно орієнтованим локальним навантажен

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Роп'як, Любомир Ярославович. "Науково-технологічні основи виготовлення деталей та складання виробів, зміцнюваних мікродуговим оксидуванням алюмінієвого шару". Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/38291.

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Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.02.08 – технологія машинобудування. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2018. У дисертаційній роботі вирішена актуальна науково-технічна проблема в області технології машинобудування: розроблено теоретичні основи та технологічні засоби для підвищення ресурсу роботи нафтогазового обладнання шляхом мікро-дугового оксидування поверхневого алюмінієвого шару деталей машин. Досліджено напружений стан двошарового покриття під довільно орієнтованим локальним навантаженн

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Lu, Jia-Rong, and 盧珈融. "Preparation of bioceramic coatings on pure titanium by micro-arc oxidation." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/885h5y.

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碩士<br>大同大學<br>材料工程學系(所)<br>102<br>Ceramic coatings containing hydroxyapatite (HA) were prepared on pure titanium using microarc oxidation (MAO) in aqueous solutions containing calcium acetate monohydrate (Ca(CH3COO)2. H2O) and monocalcium phosphate monohydrate (Ca(H2PO4)2. H2O). With home-made power supply, the constant or linear increase in the MAO voltage of pulsed power will be employed. This research was arranged by two steps. First step was focused on the effect of constant and linear increase in applied voltage on the properties of ceramic coatings on pure titanium by bipolar pulse micro

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Yu-ChiLi and 李友吉. "Porous Coatings Incorporating Strontium on Biomedical Tantalum Through Micro-Arc Oxidation." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/3mew84.

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碩士<br>國立成功大學<br>製造資訊與系統研究所<br>102<br>Containing Sr-Ca-P (Strontium Calcium phosphorus) ceramics layer were bioactive materials. We used micro-arc oxidation (MAO) to manufacture Ta2O5 with Sr-Ca-P porous coatings on tantalum substrates. The aim of this study was to fabricate porous Sr-Ca-P-containing coatings on the tantalum surface using the MAO technique and evaluate the coatings topography, phase, chemical composition and cell response. We used different instruments to investigate the coatings, including X-ray diffraction, FE-SEM and EDS. The micro-arc oxidation were not begin to reaction at

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Tsai, Yuan-Chih, and 蔡元智. "Enhancement of anticorrosion protection on magnesium alloy AZ91D through micro arc oxidation coatings and their duplex coatings." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7d36wg.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>106<br>Micro arc oxidation (MAO) is one of the surface coating technologies, suitable for passivating the lightweight metal surfaces of aluminum, magnesium, and titanium. Various plasma enhanced reactions between substrate and electrolyte by microdischarges are activated under high voltage during micro-arc oxidation. The coating, obtained from the oxidized metal substrate, has unique properties of strong adhesion, wear, and corrosion resistance. However, the surface of the micro-arc oxide coating is also porous, and the etching species, such as chlorine anions, invad

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Cheng-ChungHsu and 徐政忠. "The Effect of Titanium Implants with Micro-arc Oxidation Coatings on Osseointegration in Rabbits." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/91387333121763168447.

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碩士<br>國立成功大學<br>口腔醫學研究所<br>101<br>Today, the use of dental implants has become a common treatment procedure in the replacement of missing teeth. The key of the success of dental implant is the establishment of osseointegration between implant surface and surrounding alveolar bone. The design, chemical composition and topography of the implant surface can influence the extent of osseointegration. Many literatures show that SLA(Sandblasted, Large grit, Acid-etched) surface improved osseointegration with a high percentage of bone-implant contact and high removal torque values. Strontium (Sr), whi

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Wu, Hao-Yu, and 吳浩宇. "The Study of LZ91 Magnesium-Lithium Alloys with Micro-arc Oxidation coatings on hydrophobic properties." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/85298811787529688441.

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碩士<br>大同大學<br>材料工程學系(所)<br>103<br>Magnesium alloy have been widely used commercially due to high specific strength, damping capacity, electrical conductivity, thermal conductivity, and electromagnetic shielding. However, poor corrosion resistance of magnesium significantly limits its application. Therefore, the corrosion resistance improvement of magnesium alloys is always a critical issue for further application. Micro-arc oxidation (MAO) is a surface treatment technology to improved corrosion resistance of magnesium alloy. The MAO ceramic coating on the magnesium alloy can alleviate the corr

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Chen, Yu-Jen, and 陳宥任. "Fabrication and Characterization of Micro Arc Oxidation Coatings on Hot-dip Aluminized Medium Carbon Steel." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/49992064220950379322.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>103<br>In this study, the characteristics of the coating on the hot-dip aluminized middle carbon steel using Micro-Arc oxidation are discussed in silicate system electrolyte. The microstructures, hardness, phase structures, and corrosion resistances are discussed by adjusting duty ratio under constant frequency (1000Hz), working voltage (400V) and working time (20 minutes). Then, compared with coatings on pure aluminum in the same parameters. With duty ratio increasing, the pores on the surface will become larger and non-homogeneous. And the thickness of the coatings

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Kuan-ChenKung and 龔冠臣. "A Study on the Surface Characteristics of Porous Oxide Coatings Incorporating Strontium on Titanium by Micro-arc Oxidation." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/55142228978870602593.

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博士<br>國立成功大學<br>材料科學及工程學系<br>102<br>Titanium and its alloys are widely used in dental and orthopedic fields due to their excellent chemical stability and biocompatibility. Because they are considered as bio-inert materials in clinical use, it is difficult to achieve a chemical bonding with bone tissue. The micro-arc oxidation (MAO) technique is a modifiable method to improve surface characteristics of titanium. This study focuses on the MAO coatings formed in the electrolytes with different strontium content. Several properties of MAO coatings were investigated including physicochemical charac

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Chen, Yung-lu, and 陳永錄. "Corrosion behavior and properties of silicate and zirconia composite coatings on AZ91D magnesium alloy using micro-arc discharge oxidation." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/29983425743123390119.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>102<br>In this study, the characteristics of the oxide film coated on magnesium alloy AZ91D are discussed using silicate-based and zirconate-based electrolyte system. The microstructure, phase composition, oxide hardness and corrosion resistance of the MDO coatings were discussed by adjusting duty ratio and working time under constant frequency (500 Hz) and working voltage(400 V/-50 V). In the silicate-based electrolyte system, the higher duty ratio results in the high working current. Besides, the working current is proportional to the oxide growth rate. When the du

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Wang, Yu-Sheng, and 王昱勝. "The Study of micro-arc oxidation on The Titanium Coating." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/68905445253290196058.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>104<br>In this paper, it’s compared the qualities of the titanium oxide layer modified by micro-arc oxidation (MAO) under difference process conditions, they were compared with applied current, acting time, pulse on time and pulse off time. From obeservating the surface topography of SEM and optical microscope, it is shown impact of difference process conditions to the qualities of titanium oxide layer. Moreover, ot can be demonstrated the optimization conditions to generate the titanium oxide layer by MAO. The experiments are divided into the three parts. In first

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Wang, Jian-mao, and 王建貿. "Green pigment coating through micro arc oxidation of aluminum alloy 6061." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/83782387241654734980.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>104<br>Coloring aluminum alloys with micro arc oxidation (MAO) technique is quite difficult, because, unlike anodizing, the MAO coating does not contain regular pore structure. This study demonstrates that we are capable of achieving uniform coloring via addition of negatively charged pigment nanoparticles in the electrolyte. We select green chromia pigment to color the surface of aluminum alloy 6061 and show the feasibility of MAO coloring. Experimental results indicate the pigment particles, with adsorbed negative charge, drastically raise the oxidation current and

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Toan, Do Le Hung, and 杜黎興全. "Ceramic coating on magnesium - lithium alloys by micro-arc oxidation method." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ey4wyq.

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博士<br>元智大學<br>機械工程學系<br>106<br>Magnesium and its alloys are the lightest of light alloy constructional metallic materials with a low density, high specific strength, high damping capacity and high recyclable ability. They are considered as potential candidates for numerous applications, such as in the automobile industry, lightweight section for 3C and aerospace industries. However, the application of magnesium alloys in the industrial is still limited due to its intrinsically poor corrosion performance in the corrosion environments. Therefore, various methods have been explored to protect the

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Wang, Gaung-Hao, and 王光浩. "Ceramic Coating Obtained by Micro-Arc Oxidation of Hot-Dip Aluminized Coating on Steel." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/01690463393572945272.

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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 aims at coating ceramic membrane on the surfaces of carbon steel and stainless steel in order to achieve the objective of surface modification. Two specimens, after being hot-dip aluminized, further went through the process of micro-arc oxidation and generated ceramic membranein order to explore whether the properties of these two materials have been enhanced after surface modification. The study was divided into twophases. The first stage was to fabricate aluminum coating with sufficient thickness in order to facilitate the second stage of micro-ar

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Tran, Quang-Phu, and 陳光幅. "Functional oxide layers by sol–gel dip-coating and micro-arc oxidation." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/x39ens.

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博士<br>逢甲大學<br>材料科學與工程學系<br>104<br>Functional oxide films with thickness from a few tens of nanometers to several hundred micrometers exhibiting special properties are widely applied in industries. These include transparent conducting oxides (TCO) which make insulating glasses conducting and transparent. They may also include hard and hermetic oxide coatings on relatively soft metals such as Al, Mg and Ti and their alloys. The purposes of this study are to explore the two extremes of surface modification, i.e., TCO by dip-coating and protective oxides by micro-arc oxidation. For TCO studies, ou

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Jhou, Wei-Ping, and 周偉萍. "The technology of micro-arc oxidation black coating on AZ91D magnesium alloys." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/23721871717897269811.

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碩士<br>大同大學<br>材料工程學系(所)<br>100<br>The anodized oxide film of magnesium alloy has many defects(poor bond strength, low wear and corrosion resistance, easy fading , uneven color, etc) in traditional surface coloring technology. These defects have largely limited the applications of magnesium alloy. In this paper, black ceramic film with uniform color, smooth surface, compact structure and excellent corrosion on AZ91D alloys was successfully obtained by micro-arc oxidation. Micro-arc oxidation (MAO) is a new electrochemical surface treatment technology, suitable for treating the aluminum, magne

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LI, YUAN-ZHE, and 李沅哲. "High corrosion resistance ceramic coating on AZ31 Mg alloy by micro-arc oxidation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/54921520122695613236.

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碩士<br>逢甲大學<br>材料科學與工程學系<br>105<br>Micro-arc oxidation (MAO) treatment provides oxide layers with good adhesion, high hardness and well corrosion resistance on in valve metals and alloys. In addition, MAO treatment is relatively simple and easy to operate equipments. Most of the electrolyte applied in MAO process friendly to the environment, which is also an important advantage. This study emphasizes on the influence of power source and electrolytes on MAO process for corrosion resistant improvement of Mg-MAO coatings, such as unipolar and bipolar current mode, introduce phytic acid, sodium hyd

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Liu, Jiayang. "Electrochemical behaviors of micro-arc oxidation coated magnesium alloy." Thesis, 2014. http://hdl.handle.net/1805/5966.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>In recent years, magnesium alloys, due to their high strength and biocompatibility, have attracted significant interest in medical applications, such as cardiovascular stents, orthopedic implants, and devices. To overcome the high corrosion rate of magnesium alloys, coatings have been developed on the alloy surface. Most coating methods, such as anodic oxidation, polymer coating and chemical conversion coating, cannot produce satisfactory coating to be used in human body environment. Recent studies demonstrate that micro-arc oxidatio

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Ye, Sih-Ting, and 葉思婷. "Preparation and Corrosion Evaluation of Micro-arc Oxidation Coating Formed on Aluminum Alloy Sealed with Resin Coating." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/44944563617915396170.

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碩士<br>國立高雄應用科技大學<br>化學工程與材料工程系博碩士班<br>105<br>Protective composite coating were prepared on aluminum (Al) alloy by micro-arc oxidation (MAO) treatment plus a top coating with epoxy resin (Epoxy) system sealing agent and poly(methyl methacrylate) (PMMA) system sealing agent using immersion technique. MAO coatings on aluminum alloy are prepared in silicate electrolytes. Phase composition of MAO coatings are investigated by X-ray diffraction (XRD).The results showed that the MAO coatings are mainly composed of α-Al2O3 and γ-Al2O3 and the proportion of α-Al2O3 and γ-Al2O3 are affected by current de

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Hung, Ren-Yuan, and 黃任遠. "Thermal analysis and residual stress determination of micro-arc oxidation coating on aluminum foil." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/18336756331088301506.

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碩士<br>大同大學<br>材料工程學系(所)<br>103<br>Micro-arc oxidation (MAO) has been extensively applied in many fields such as aerospace, military industry, etc. MAO coatings outperform other traditional surface treatments (such as anodic treatment and electroplating) in terms of corrosion resistance and wear resistance. MAO is a more environmentally friendly process. During MAO, extremely high temperature of micro arc will lead to oxidation and sintering reaction and quenching on the anodic surface. Therefore, thermal stress and unique microstructure will be formed during MAO process. In the study, MAO coat

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Lin, Yu-Hui, and 林育暉. "The Effect of Micro-arc oxidation Coating on the Surface roughness of Titanium Alloy." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/4kxc9b.

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碩士<br>大同大學<br>材料工程學系(所)<br>106<br>Titanium 3D printing can print many particular structures, because it is powder stacked, after laser or high temperature sintering, the surface of the product will be extremely rough, so post-treatment is needed to improve the appearance; There are many methods for smoothing the surface, such as mechanical (CNC cutting machine) polishing, but it is difficult to handle with concave curved surface or complicated shape; and electrochemical polishing can better treat the surface smoothness of all products. The research is divided into two parts: The first part is

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Li, Wei-Cheng, and 李偉誠. "The Influence of Different Cobalt Electrolyte on Magnesium Alloy Coating Surfaces by Micro-Arc Oxidation." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/5za3tx.

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碩士<br>龍華科技大學<br>化工與材料工程系碩士班<br>107<br>Magnesium alloys have been widely used in 3C products, automotive industry and leisure products due to their low density, heat resistance and heat dissipation. Most of the AZ series of magnesium alloys are favored on the market, but magnesium alloys have high chemical activity and are prone to corrosion in the atmosphere, which makes magnesium alloys extremely limited in application. Surface treatment is one of the methods to effectively improve the corrosion resistance of magnesium alloys. Therefore, this study used micro-arc oxidation technology to prepa

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Lin, Pei-Ru, and 林佩儒. "The effect of the Voltage Level on Hydroxyapatite Coating of Titanium Plate by Micro-arc Oxidation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/11247485424189939161.

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碩士<br>大同大學<br>材料工程學系(所)<br>98<br>Hydroxyapatite crystallite has successfully been deposited on titanium plates by micro-arc oxidation in this work. The electrolytic solution is composed of mixture of electrolytic solution and 10g/L hydroxyapaite powders with 10% alcohol solution in this experiment. The electrolytic solution contains 0.075M Ca(CH3COO)2•H2O,0.025M Ca(H2PO4)2•H2O,0.04M EDTA-2Na and 0.375M NaOH. Different voltage is employed on titanium plates which immersed in electrolytic bath to observe the characteristic of surface on hydroxyapatite coating. As voltage at the interval of 275 t

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Chen, Chiao-Ting, and 陳巧婷. "The Study of High Corrosion Properties at Mg-Li Alloy Micro-arc Oxidation Coating and Metalization." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/64734374475297244664.

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碩士<br>國防大學理工學院<br>化學工程碩士班<br>103<br>Mg-Li alloy (LZ91) has some excellent properties such as low density, light weight (similar to plastic), high strength-weight ratio and high specific stiffness. However, poor corrosion resistance of Mg-Li alloy (LZ91) limited its industrial application. In this study, we prepared an oxide film on the surface of LZ91 using micro-arc oxidation process to improve the corrosion behavior of LZ91. The effects of electrolyte composition (sodium silicate, sodium phosphate and sodium fluoride), different waveforms (DC, unipolar and bipolar) and different operated vol

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Chang, Chu-Ting, and 張筑婷. "Corrosion behavior and charge ratio of zirconia coating on magnesium alloys using micro-arc discharge oxidation." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/43828085067682810505.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>103<br>In this study, the characteristics of the zirconia coating on magnesium alloys were discussed on different charge ratio using micro-arc discharge oxidation (MDO) process in zirconate-based electrolyte. The element content and phase distribution of zirconia coating from charge ratio plasma have been investigated. The morphologies and phase components of the coating were examined by SEM and XRD. In order to understand the corrosion behavior of the zirconia coatings with different phase composition distribution, the zirconia coatings were immersed in chloride env

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Chu, Shu-Chin, and 褚淑青. "The Study of Titanium Alloy Surface Coating with Hydroxyapatite Powder by Use of Micro-Arc Oxidation." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/36xh4m.

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碩士<br>龍華科技大學<br>化工與材料工程系碩士班<br>107<br>The substrates of titanium or titanium alloy are widely used in biomaterials as they own the characteristics of excellent biocompatibility, high mechanical strength, abrasion resistance and chemical stability. However, further application and development of these titanium alloys are retarded by the obstacles of weak bonding strength, defective bioactivity and long healing duration. Therefore, the micro-arc oxidation treatment of titanium or titanium alloy in an electrolyte containing calcium, phosphorus ion or hydroxyapatite particles to form a biological-

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Hung-PangLee and 李泓邦. "Preparation of Gallic Acid Modified Micro Arc Oxidation Coating on Magnesium Alloy: Corrosion and Biocompatibility Assessment." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/pt456p.

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碩士<br>國立成功大學<br>生物醫學工程學系<br>105<br>Magnesium alloys are biodegradable materials with good biocompatibility. Its mechanical properties are close to human’s natural bone and thus magnesium alloys are good candidates of biodegradable bone implants. However, the unmodified magnesium alloys may suffer from the rapid corrosion in the physiological environment. Moreover, the byproducts of the corrosion, such as hydrogen, high concentration of metallic and alkaline ions, will cause the inflammatory of the osseous tissue. Thus, this research utilized surface modification to decrease the corrosion rate

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Huang, Jhing-Jie, and 黃靖捷. "The Effect of Oleic Acid Coating on AZ91D Magnesium Alloy after Micro-arc Oxidation on Hydrophobic Properties." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/9265k8.

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碩士<br>大同大學<br>材料工程學系(所)<br>102<br>The corrosion resistance and hardness (wear resistance) can be substantially improved by micro arc oxidation (MAO). However, the hydrophilic surface of MAO coating limits its commercial applications in some fields. In this work, C6H18O24P6+NaOH and Na2O3Si MAO were used as electrolytes. different duration and electrical parameters will influence the surface morphologies of MAO coating. It can be concluded that rougher surface will lead to more hydrophilic surface. The more hydrophilic surface will be detrimental to the corrosion resistance performance. The sub

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Wu, Ming-Feng, and 吳明峰. "The Study of the Fabrication Parameters of Micro-arc Oxidation on Hydroxyapatite Coating on Pure Titanium Plate." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/25393134650693236155.

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碩士<br>大同大學<br>材料工程學系(所)<br>98<br>TiO2-based coatings were prepared on pure titanium by micro-arc oxidation (MAO) in an electrolytic solution containing Ca(CH3COO)2．H2O, Ca(H2PO4)2．H2O, EDTA–2Na and NaOH. SEM/EDS and XRD were adopted to investigate the microstructure, elements distribution and phase composition of the coatings prepared in the above electrolytes. Macro-porous titania-based coatings were formed on the titanium substrates at various voltages, charging times, duty ratios, Ca/P ratios, and concentrations of NaOH. The phase, Ca and P content, morphology, and thicknesss of the coating

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Li, Ming-xi, and 李明禧. "The optimization of wear-resistance of micro arc oxidation ceramic coating on pure titanium by Taguchi Method." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/48429244497264590264.

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碩士<br>大同大學<br>材料工程學系(所)<br>103<br>Although titanium exhibit a high specific strength, fatigue strength and corrosion resistance, the low hardness limit its mechanical applications. Wear resistance of titanium is imperative before further commercial application. In this study, the titanium metal was used as substrate. The well-adhered and homogeneous micro arc oxidation (MAO) ceramic coating on Ti surface consists of crystalline phases (anatase and rutile) and amorphous phase. The composition of aqueous electrolytic solution and electrical parameters will be accessed in terms of tribological pr

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Bosta, Mohannad Majid Saleem Al, and 浦和達. "The Infrared Emissivity of Ceramic Coating Produced by Micro-Arc Oxidation Process on Surface of 6061 Aluminium Alloy." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/27475208405542687687.

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博士<br>中華大學<br>工程科學博士學位學程<br>102<br>ABSTRACT The high emitter surfaces enhance the thermal performance of heating and cooling systems and consequently reduce the needed energy. This study devoted to the enhancement of emissivity of 6061 aluminum alloy by microarc oxidation process (MAO). We investigated the impact parameters on the low temperature IR emissivity of MAO alumina ceramic prepared at different conditions and we found that: - In general, the MAO enhanced the IR emissivity at the whole studied wavelength range (4-16 µm). - The curve of IR emissivity has two major regions: semitr

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Hsieh, Sheng-Long, and 謝昇龍. "Deposition of high adhesion and biological activity coating on titanium substrate by bipolar pulse micro-arc oxidation and hydrothermal method." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/12390279086187955926.

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碩士<br>大同大學<br>材料工程學系(所)<br>98<br>In the experimental process, contains calcium and phosphorus of oxide ceramic coating on titanium substrate produced by pulsed bipolar micro-arc oxidation process. The oxide ceramic consisted of anatase and rutile,and the thickness of the film was 3~15μm.Hydroxyapatite crystallization is forming on surface of the oxide film prepared by hydrothermal, consult of oxide layer are porous, rough, high adhesion and biological activity. It was found in the constant voltage mode, use high voltage to generate a higher adhesion of the film. The maximum adhesion over 5

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Lu, Tzu-jiun, and 魯子駿. "The influence of electrolytic concentration on the peoperties of ceramic coating on 7075-T6 Al alloy by micro-arc oxidation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/19139343695929676676.

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碩士<br>大同大學<br>材料工程學系(所)<br>99<br>Micro-Arc Oxidation is a new surface coating technology, although this technique is similar to the traditional anodic coatings, traditional anodic coating is an many-step process and has to use many strong acid and alkali. It is not friendly to environment. Micro-arc oxidation is a simple process, and environment- friendly electrolytes are used only. The characteristic of ceramic coating is better than anodizing (for example, anti-corrosion, anti-wear, high hardness). Aluminum is well-known as light weight, high specific strength and easy to shape. Through sui

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