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Journal articles on the topic 'Microarc oxidation'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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1

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.

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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.

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2

Ma, Jie, Yuan Sheng Yang, Xiu Chun Wang, Jing Zhang, Shuo Liu, Li Kun Jiang, and Xi Bin Yi. "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.

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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.

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3

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.

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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.

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4

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

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5

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.

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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.

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6

Liu, Wan Hui, Ai Lian Bao, Xin Yu Mao, and Guang Hai Zheng. "Microstructure and Properties of Microarc Oxidation Ceramic Coatings on Aluminum Alloy." Key Engineering Materials 353-358 (September 2007): 1895–98. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.1895.

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The paper discusses structure and property aspects of oxide films formed on 7075 aluminum alloys by microarc oxidation in alkali-silicate electrolytic solution. Microstructure, surface morphology and phase composition of the ceramic coatings were investigated by SEM and XRD. Distribution of hardness along the coating thickness was determined by microhardness analyses. The friction and wear behavior of the oxide films against steel counterparts was evaluated with a friction and wear tester. The results showed that the microarc oxidation coatings composed mainly of α-Al2O3 and γ-Al2O3 phase are dense and uniform, which indicates that the wear resistance of Al alloy could be improved obviously by microarc oxidation. The films possess a beneficial combination of 25~45 μm thickness, HV0.11500 microhardness and provide a low wear rate but a relatively high friction coefficient against GCr15 steel under dry friction condition.

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7

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.

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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.

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8

WANG, Y. M., B. L. JIANG, L. X. GUO, and T. Q. LEI. "ANTIFRICTION PROPERTY OF MICROARC OXIDATION COATING ON TITANIUM ALLOY UNDER SOLID LUBRICATING SLIDING CONDITION." Surface Review and Letters 11, no. 04n05 (August 2004): 367–72. http://dx.doi.org/10.1142/s0218625x04006360.

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Ceramic coatings were fabricated on Ti6Al4V alloy surface by microarc oxidation (MAO) in Na 2 SiO 3–( NaPO 3)6– NaAlO 2 solution using an AC power supply. Microstructure and phase composition of coating were characterized by SEM and XRD, respectively. The antifriction property of the coating with and without solid lubricant sliding against SAE 52100 steel ball was investigated on a pin-on-disk friction and wear tester. The results show that the microarc oxidation coating is relatively dense and uniform, mainly composed of rutile and anatase. The coating sliding against the steel has friction coefficient as low as 0.2–0.3 at an applied load of 0.5 N and sliding cycle below 2500, which is much smaller than that of uncoated Ti6Al4V against the same counterpart. The transferring of materials from the softer steel ball onto the coating surface is the main wear event, while the microarc oxidation coating is characterized by slight abrasive wear and adhesive wear. Introducing solid graphite lubricant into the porous surface of microarc oxidation coating significantly improves the long-term antifriction property (registering friction efficient of 0.15 in the long-term sliding) under a similar sliding condition. This improvement is attributed to the reduction of materials that are transferred from the softer steel ball onto the coating surface.

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9

Khokhlov, A., D. Maryin, D. Molochnikov, A. Khokhlov, I. Gayaziev, and O. Smirnova. "Influence of the thickness and porosity of the oxide coating on the piston heads depending on the parameters of the microarc oxidation mode." Journal of Physics: Conference Series 2131, no. 4 (December 1, 2021): 042046. http://dx.doi.org/10.1088/1742-6596/2131/4/042046.

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Abstract This paper discusses the process of formation of an oxide coating (hardening and heat-insulating coating) on the working surfaces of the head (top and piston grooves) of the piston by the method of microarc oxidation (MAO). In the process of oxidation of the piston head, the operating parameters of MAO will have a significant effect on the thickness and porosity of a formed oxide coating. The paper presents the theoretical relationships between the electrical parameters of the microarc oxidation mode and the thickness and porosity of the oxide coating. The thickness of the formed oxide coating on the piston heads will depend on the applied voltage and the composition of the electrolyte used. The porosity of the formed oxide coating will depend on the parameters of the current strength and the applied voltage. It is theoretically established that the formation of an oxide coating of a certain thickness and porosity occurs due to changes in the current strength, voltage and time of microarc oxidation.

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10

Lu, Chuang, Fa Qin Xie, and Li Ping Zhu. "Microstructure and Tribological Properties of Microarc Oxidation Coatings on Al-Si Alloy." Key Engineering Materials 703 (August 2016): 112–18. http://dx.doi.org/10.4028/www.scientific.net/kem.703.112.

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Microarc oxidation(MAO) was used to prepare the coatings on the surface of Al-Si alloy. Besides, scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) were utilized to research the microstructure characteristics, the components distribution, and the phase compositions, for the microarc oxidation coatings on Al-Si alloys. Furthermore, the growth process and wear properties of the coatings were explored. Results indicated that:the phase compositions of microarc oxidized coating consisted of mullite (3Al2O3·2SiO2), α- Al2O3 and γ- Al2O3. With the increase of load, the friction coefficient of the coating decreased, however it was greater than that of Al-Si alloy substrate. The wear resistance of the coating were one time higher than that of the substrate.

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11

TANG, MING QI, WEI PING LI, HUI CONG LIU, and LI QUN ZHU. "THE EFFECT OF TITANIA SOL IN PHOSPHATE ELECTROLYTE ON MICROARC OXIDATION COATINGS ON ALUMINUM ALLOY." International Journal of Modern Physics B 24, no. 15n16 (June 30, 2010): 3190–95. http://dx.doi.org/10.1142/s0217979210066306.

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Black and gray microarc oxidation coatings have been obtained on 2A70 Aluminum alloy in phosphate electrolyte with and without titania sol, respectively. The growth process of the microarc oxidation coating in the electrolyte with titania sol was investigated. The coating was characterized by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and X-ray. The coating thickness was measured by eddy current thickness meter. The results show that the titania sol increase the growth rate of microarc oxidation coating. In both cases the composition of coatings contain Al and O , and are mainly composed of γ- Al 2 O 3 and AlPO 4. Compared with the gray coating, large amount of Ti is found on the surface of black coating. The titania sol added in the electrolyte results in Ti in the coating, in the form of TiO and Al 2 TiO 5.

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12

Mi, T., B. Jiang, Z. Liu, and L. Fan. "Plasma formation mechanism of microarc oxidation." Electrochimica Acta 123 (March 2014): 369–77. http://dx.doi.org/10.1016/j.electacta.2014.01.047.

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13

Markov, M. A., D. A. Gerashchenkov, A. V. Krasikov, I. V. Ulin, A. D. Bykova, M. L. Shishkova, and N. V. Yakovleva. "Porous Functional Coatings by Microarc Oxidation." Glass and Ceramics 75, no. 7-8 (November 2018): 258–63. http://dx.doi.org/10.1007/s10717-018-0067-9.

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14

Xia, Lingqin, Jianmin Han, Joseph P. Domblesky, Zhiyong Yang, and Weijing Li. "Investigation of the Scanning Microarc Oxidation Process." Advances in Materials Science and Engineering 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/2416821.

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Scanning microarc oxidation (SMAO) is a coating process which is based on conventional microarc oxidation (MAO). The key difference is that deposition in SMAO is achieved by using a stainless steel nozzle to spray an electrolyte stream on the substrate surface as opposed to immersing the workpiece in an electrolyzer. In the present study, SMAO discharge characteristics, coating morphology, and properties are analyzed and compared to results obtained from MAO under similar conditions. Results show that MAO and SMAO have comparable spark and microarc lifetimes and sizes, though significant differences in incubation time and discharge distribution were evident. Results also showed that the voltage and current density for MAO and SMAO demonstrate similar behavior but have markedly different transient and steady-state values. Results obtained from coating A356 aluminum sheet show that oxide thickness and growth rate in SMAO are strongly dependent on interelectrode spacing and travel speed. Analysis of the SMAO coating morphology and structure showed that a denser and slightly harder layer was deposited in comparison to MAO and is attributed to reduced porosity and increased formation of α-Al2O3. Preliminary results indicate that SMAO represents a viable process for coating of aluminum surfaces.

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15

Chen, Fei, Hai Zhou, and Fan Xiu Lv. "Friction and Wear Behavior of Micro-Arc Oxidation Ceramic Coating on Pure Magnesium Surfaces." Advanced Materials Research 228-229 (April 2011): 661–65. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.661.

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A relatively new process called microarc oxidation (MAO), also called plasma electrolytic oxidation (PEO), has emerged as a unique technique to produce hard, thick ceramic oxide coatings on different Mg or Al alloys. The magnesium offers various possibilities of application in industry, but its poor property in corrosion resistance, wear resistance, hardness and so on, limited its application. Through microarc oxidation, ceramic coating is directly formed on the surface of pure magnesium, by which its surface property is greatly improved. In this paper, a dense ceramic oxide ceramic coating was prepared on the magnesium by microarc oxidation in a Na2SiO3-Na2WO4-KOH-Na2EDTA electrolytic solution. The surface morphology of the coating was observed by the Scanning Electron Microscope (SEM). Using the X-ray diffraction (XRD), the phase structure of the coating was analyzed. The friction and wear behavior of the micro-arc oxidation ceramic coating under dry sliding against GCr15 steel was evaluated on a ball-on-disc test rig. The results showed that the magnesium was characterized by adhesion wear and scuffing under dry sliding against the steel, while the surface micro-arc oxidation ceramic coating experienced much abated adhesion wear and scuffing under the same testing condition. The micro-arc oxidation ceramic coating showed good friction-reducing and fair antiwear ability in dry sliding against the steel.

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16

Lv, Ying, Jun Gang Li, Ming Zhong Wu, Zhen Ma, Jing Qiang Zhang, and Le Le Wang. "Corrosion resistance of the microarc oxidation coatings prepared on magnesium alloy." E3S Web of Conferences 38 (2018): 02009. http://dx.doi.org/10.1051/e3sconf/20183802009.

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Ceramic coatings were prepared on the surface of AZ91D magnesium alloy by microarc oxidation technology. The effects of different voltages on morphology, phase composition and thickness of the coatings were characterized by SEM and XRD. The corrosion resistance of the coatings was measured by electrochemical workstation. Results indicated that the microarc oxidation coatings prepared in sodium silicate electrolyte exhibited porous surface and mainly comprised MgO, Mg2SiO4 and a small amount of MgAl2O4. The thickness of the oxide coatings increased rapidly with the increase of voltage. The coating prepared at 400V voltage had good electrochemical corrosion resistance in 3.5wt% NaCl solution.

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17

Shichkov, L. P., V. B. Lyudin, and A. V. Epelfeld. "Electrotechnology of microarc oxidation of light alloys." Traktory i sel hozmashiny 79, no. 6 (June 15, 2012): 55–56. http://dx.doi.org/10.17816/0321-4443-69416.

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Features of electrotechnology of microarc oxidation of light (Al, Mg, Ti) alloys are considered. A module with current displacement effect was developed and described. It allows to control the ratio of cathode and anode currents and the rigidity of mode in condensing AC inverters which are widely used for this technology.

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18

Xiao, Feng, Hui Chen, Jingguo Miao, and Juan Du. "Effect of oxidation time on the microstructure and properties of ceramic coatings prepared by microarc oxidation on 7A04 superhard aluminum alloy." International Journal of Modern Physics B 31, no. 16-19 (July 26, 2017): 1744026. http://dx.doi.org/10.1142/s021797921744026x.

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Under the sodium aluminates’ system, microarc oxidation treatment was conducted on the superhard aluminum alloy 7A04 for different times. The microstructure of microarc oxidation ceramic layer was investigated by using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The influences of different oxidation times on the adhesion strength of ceramic layer and substrate, the morphology of surface and cross-section, the phase composition and the electrochemical properties were studied. The results indicated that the connection of the coating and substrate appears to be metallurgical bonding and dense ceramic layer, and the surface is in a “volcanic vent” morphology, which is composed of [Formula: see text]-Al2O3 and little [Formula: see text]-Al2O3. The corrosion resistance of ceramic layer is improved significantly in contrast with that of the substrate.

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19

Butyagin, Pavel I., Svetlana S. Arbuzova, Anton V. Bolshanin, and Anton I. Kondratenko. "Technological and ecological aspects of microarc oxidation." Electroplating and Surface Treatment 28, no. 2 (2020): 29–38. http://dx.doi.org/10.47188/0869-5326_2020_28_2_29.

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20

Vladimirov, B. V., B. L. Krit, V. B. Lyudin, N. V. Morozova, A. D. Rossiiskaya, I. V. Suminov, and A. V. Epel’feld. "Microarc oxidation of magnesium alloys: A review." Surface Engineering and Applied Electrochemistry 50, no. 3 (May 2014): 195–232. http://dx.doi.org/10.3103/s1068375514030090.

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21

Borisov, A. M., B. L. Krit, V. B. Lyudin, N. V. Morozova, I. V. Suminov, and A. V. Apelfeld. "Microarc oxidation in slurry electrolytes: A review." Surface Engineering and Applied Electrochemistry 52, no. 1 (January 2016): 50–78. http://dx.doi.org/10.3103/s106837551601004x.

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22

Krit, B. L., V. B. Ludin, N. V. Morozova, and A. V. Apelfeld. "Microarc Oxidation of Carbon-Graphite Materials (Review)." Surface Engineering and Applied Electrochemistry 54, no. 3 (May 2018): 227–46. http://dx.doi.org/10.3103/s1068375518030080.

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23

Wang, Y. Q., Y. Z. Deng, Y. W. Shao, and F. H. Wang. "New sealing treatment of microarc oxidation coating." Surface Engineering 30, no. 1 (December 6, 2013): 31–35. http://dx.doi.org/10.1179/1743294413y.0000000195.

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24

Rakoch, A. G., I. V. Bardin, V. L. Kovalev, and T. G. Avanesyan. "Microarc oxidation of light constructional alloys: Part 1. Main notions on the microarc oxidation of light constructional alloys." Russian Journal of Non-Ferrous Metals 54, no. 4 (July 2013): 341–44. http://dx.doi.org/10.3103/s1067821213040135.

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25

Sedelnikova, Maria B., Ekaterina G. Komarova, and Yurii Sharkeev. "Wollastonite and Calcium Phosphate Biocoatings with Zn- and Cu-Incorporation Produced by a Microarc Oxidation Method." Key Engineering Materials 695 (May 2016): 144–51. http://dx.doi.org/10.4028/www.scientific.net/kem.695.144.

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Investigations of wollastonite and calcium phosphate biocoatings with Zn-and Cu-incorporation produced by a microarc oxidation method were presented. Dependences of coating properties on the microarc oxidation parameters were revealed. A variation of the process parameters allowed us to produce wollastonite-calcium phosphate coatings with a plate-like structure, thickness of 25–30 μm, roughness of 2.5–5.0 μm, and enhanced strength properties. Coatings based on substituted hydroxyapatite deposited under voltages of 200–250 V have an X-ray amorphous structure. An increase of oxidation voltage to 300 V leads to the formation of crystalline phases in the coating, such as CaHPO4 and β-Ca2P2O7. The maximum content of 0.4 at% zinc and 0.1 at% copper was obtained for coatings based on Zn-and Cu-substituted hydroxyapatites, consequently, deposited under oxidation voltage of 250 V.

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26

LI, ZHENWEI, and SHICHUN DI. "MICROSTRUCTURE AND PROPERTIES OF MAO COMPOSITE COATINGS CONTAINING NANORUTILE TiO2 PARTICLES." Surface Review and Letters 24, no. 03 (March 30, 2017): 1750115. http://dx.doi.org/10.1142/s0218625x17501153.

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Microarc oxidation (MAO) composite coatings containing rutile TiO2 were produced on 2024 aluminum alloy in an electrolyte with nanorutile TiO2 particles. The microstructure and properties of the composite coatings were analyzed by SEM, EDS, laser confocal microscope, XRD, Vickers hardness tester, scratch test and friction test, respectively. The results showed that the composite coatings consisted of [Formula: see text]-Al2O3, [Formula: see text]-Al2O3, mullite and rutile TiO2. With increasing concentration of rutile TiO2 particles in the electrolyte, the compactness of the composite coatings was improved significantly. The abrasion performance of the microarc oxidation composite coatings containing rutile TiO2 was better than that of MAO coatings without rutile TiO2.

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27

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." Materials Science Forum 546-549 (May 2007): 1145–48. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.1145.

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The wear and corrosion protective films were synthesized on the LC4 Al-Zn-Mg-Cu alloy by microarc oxidation (MAO) technique in an alkali-silicate electrolyte. The microstructure and composition profiles were investigated by scanning electron microscopy and energy dispersive spectroscopy, and the phase structure was performed by X-ray diffraction. The corrosion resistance of coated LC4 alloy was evaluated using potentiodynamic polarization curves. The MAO film consists of γ-Al2O3, α-Al2O3 and amorphous SiO2 phases. The film up to 210 μm contains two layers. The Si element from electrolyte enriched in the outer layer film. After microarc oxidation treatment, the microhardness and corrosion resistance of LC4 alloy were improved significantly.

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28

Zheng, Qiuxia, Zongbin Sun, Zhanhui Wang, Tinghe Duan, Kai Xu, Mengmeng Cai, and Bi Wang. "Corrosion and biocompatibility behaviours of microarc oxidation/phytic acid coated magnesium alloy clips for use in cholecystectomy in a rabbit model." RSC Advances 11, no. 34 (2021): 20730–36. http://dx.doi.org/10.1039/d0ra09275d.

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29

Butyagin, P. I. "Effect of microarc oxidation by short-pulse mode parameters on composition, coating properties and process productivity." Perspektivnye Materialy 5 (2021): 82–88. http://dx.doi.org/10.30791/1028-978x-2021-5-82-88.

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This article presents the results of study of the influence of microarc oxidation parameters — ferquency and pulse duration — on the composition, properties of the coating, and also on the productivity of the microarc oxidation (MAO) process. It was found that the frequency in the range from 100 to 500 Hz significantly increases the formation rate of the MAO coating. A change in the composition and properties of the MAO coatings at pulse durations from 50 to 200 μs is observed. Starting with a pulse duration of 50 μs and a frequency of 400 Hz, the γ-Al2O3 crystalline phase is detected in the coating, the elemental composition, morphology, and microhardness of the coating change significantly.

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30

Lao, Xing Sheng, Xu Feng Zhao, Yong Liu, Chun Hui Dai, and Wei Jian Lv. "Experimental Study on Friction Characteristics of Micro-Arc Oxidation Modified Layer on Titanium Alloy Surface." Materials Science Forum 990 (May 2020): 44–49. http://dx.doi.org/10.4028/www.scientific.net/msf.990.44.

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In order to study the effect of microarc oxidation modification treatment on the friction properties of titanium alloy surface, the surface treatment layer of Ti-6Al-4V ELI specimen modified by Microarc oxidation surface was sampled, the surface layer hardness, roughness and treatment layer thickness were tested, the microscopic morphology was analyzed, The friction tests of TC4 substrate and micro-arc oxidation treatment surface disc with 25% glass fiber, 15% fiberglass +5% graphite and 60% tin bronze reinforced PTFE pin were carried out, and the results showed that the thickness increased slightly and the surface layer hardness increased by about 75% after the micro-arc oxidation surface modification treatment. Compared with the substrate, the surface roughness is obviously improved, and the friction coefficient of the surface treatment specimen is similar to that of the TC4 titanium alloy substrate, but the wear amount is higher than that of the TC4 titanium alloy substrate.

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31

Godzhayev, Z. A., S. D. Zaytsev, O. V. Somov, and I. V. Suminov. "Wear resistance and tribological properties of nanostructured composites obtained by the microarc oxidation technique." Traktory i sel hozmashiny 80, no. 2 (February 15, 2013): 38–41. http://dx.doi.org/10.17816/0321-4443-65921.

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32

Sun, Haiou, Liangcai Li, Zhongyi Wang, Bin Liu, Meng Wang, and Yunliang Yu. "Corrosion Behaviors of Microarc Oxidation Coating and Anodic Oxidation on 5083 Aluminum Alloy." Journal of Chemistry 2020 (November 20, 2020): 1–11. http://dx.doi.org/10.1155/2020/6082812.

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The microarc oxidation (MAO) coating and anodic oxidation coating were prepared on 5083 aluminum alloy. The surface morphology, elemental composition, and electrochemical behavior of the two coatings were analyzed. The results proved that the corrosion resistance of the MAO coating is superior than that of the anodic oxidation coating. The protective ability of the coating deteriorated gradually with the increase in immersion time. The corrosion process is controlled by ion diffusion throughout the coatings.

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33

Li, Shu Hua, Yu Jun Yin, Da Wei Shen, Yuan Yuan Zu, and Chang Zheng Qu. "Tribological Performance of Ceramic Composite Coatings Obtained through Microarc Oxidation on Ly12 Aluminum Alloy." Key Engineering Materials 537 (January 2013): 7–11. http://dx.doi.org/10.4028/www.scientific.net/kem.537.7.

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A dense ceramic oxide coating approximately 30µm thick was prepared on a Ly12 Al alloy by microarc oxidation in an alkali-silicate electrolytic solution. The morphology and microstructure were analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD). Coating thickness and surface roughness (Ra) were measured after the coating had been synthesized. The tribological performance of the coatings was evaluated using a dry sand abrasion test and a solid particle erosion test. The results show that microarc oxidation coatings consist of the loose superficial layer and the inner dense layer. Both inner layer and out layer are composed of α-Al2O3 and γ-Al2O3, While the Al6Si2O3 phase is observed only in out loose layer. The average of the microhardness of the coating is 2096Hv.

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34

Zhukovsky, A. V., and B. V. Shandrov. "Monitoring of Microarc Oxidation Process with Application of personal computer." Izvestiya MGTU MAMI 3, no. 1 (January 10, 2009): 121–23. http://dx.doi.org/10.17816/2074-0530-69956.

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The article considers monitoring of the microarc oxidation process via PC. A series of computer programs is developed. The obtained results allow to assess the sustainability of the process in various modes and at different stages of the process of oxidation and to determine the time of transition to a dangerous regime.

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35

Krivonosova, Ye A., A. I. Gorchakov, and Yu V. Scherbakov. "Structure and properties of coatings in microarc oxidation." Welding International 28, no. 10 (January 30, 2014): 816–19. http://dx.doi.org/10.1080/09507116.2013.868099.

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36

Nechaev, G. G., and S. S. Popova. "Dynamic model of single discharge during microarc oxidation." Theoretical Foundations of Chemical Engineering 49, no. 4 (July 2015): 447–52. http://dx.doi.org/10.1134/s0040579515040338.

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Han-Hua, Wu, Jin Zeng-Sun, Long Bei-Yu, Yu Feng-Rong, and Lu Xian-Yi. "Characterization of Microarc Oxidation Process on Aluminium Alloy." Chinese Physics Letters 20, no. 10 (September 24, 2003): 1815–18. http://dx.doi.org/10.1088/0256-307x/20/10/345.

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38

Chernyshov, N. S., Yu A. Kuznetsov, M. A. Markov, A. V. Krasikov, and A. D. Bykova. "Corrosion tests of oxideceramic coatings formed by microarc oxidation." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 4 (September 16, 2020): 51–55. http://dx.doi.org/10.17073/1683-4518-2020-4-51-55.

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The results of experimental studies of the corrosion resistance of aluminum and its alloys modified with ceramic coatings based on the microarc oxidation method in some aggressive environments are presented. The mechanism of destruction of the coating is considered. Recommendations on increasing corrosion resistance are given.

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Zhang, Dong, Bao Ping Zhang, Zhi Ge Li, Lin Wang, Bin Liu, and Jin Qing Wang. "Biocompatibility of HAP/Ti Gradient Coating by Microarc Oxidation and Biomimetic Process." Advanced Materials Research 177 (December 2010): 325–28. http://dx.doi.org/10.4028/www.scientific.net/amr.177.325.

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This study is to evaluate the biocompatibility of HAP/Ti gradient coating by microarc oxidation and biomimetic process. Titanium alloys were activated by microarc oxidation (MAO), and immersed in simulated body fluid to prepare HAP/Ti gradient coating. Scanning electron microscopy (SEM) had been used to investigate the microstructure of the coatings. The biocompatibility of the coatings was evaluated by animal acute and subacute toxicity test, micronucleus test, hemolysis test, and oral mucosa test. The results showed HAP/Ti gradient coating was successfully fabricated on the substrate. The animal experiment showed the coating had not short-term toxicity, oral mucosa irritation, and micronucleus occurrence rate was 3.2 ‰ and hemolysis rate was 2.5%. The HAP/Ti gradient coating made by MAO and biomimetic process showed good bio-security and compatibility, it may be new oral implant materials.

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Fu, Ming, Jun Ming Li, and Hui Cai. "Mono-Component-Solution Controlled Growth of Microarc Oxidation Coatings on Aluminum Substrates." Advanced Materials Research 1088 (February 2015): 358–62. http://dx.doi.org/10.4028/www.scientific.net/amr.1088.358.

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The growth of microarc oxidation (MAO) coatings on aluminum substrates was controlled by different mono-component solutions, involving (NaPO3)6, Na3PO4, Na2SiO3 and Na2MoO4 aqueous electrolyte. The results show that (NaPO3)6 solution can accelerate the growth of MAO coating, revealed by the maximum coating thickness of 12.1 μm; and meanwhile, Na2SiO3 solution favors the doping of solute elements during MAO, suggested by 10.75 at.% Si in coating. Furthermore, the variety of mono-component solution also affects the porous structure of MAO coating. It is assumed that the property of coating/solution interface is influenced by solution variety, while the interfacial property determines the solidification of ceramic particles and the adsorption of solute anion during microarc discharge, thus realizing controlled growth of MAO coating.

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CHEN, TINGFANG, YONGLIANG LI, WENBIN XUE, CHAOLIN YANG, YAO QU, and MING HUA. "INFLUENCE OF MICROSTRUCTURE OF FRICTION STIR WELDED JOINTS ON GROWTH AND PROPERTIES OF MICROARC OXIDATION COATINGS ON AZ31B MAGNESIUM ALLOY." Surface Review and Letters 22, no. 02 (April 2015): 1550029. http://dx.doi.org/10.1142/s0218625x15500298.

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Ceramic coatings on friction stir welded (FSW) joints of AZ31B magnesium alloy were fabricated by microarc oxidation (MAO) method in silicate electrolyte. Microstructure, phase constituents, microhardness and electrochemical corrosion behaviors of bare and coated magnesium alloys at different zones of FSW joints for different oxidation time were investigated. The influence of microstructure at different zones on the growth of MAO coatings was analyzed. The results show that the MAO coatings on FSW joints are uniform, and they have almost the same morphology, phase constituents, hardness and corrosion resistance at base metal, stir zone and heat-affected zone. The properties of MAO coatings are independent on the microstructures of AZ31B alloy. In addition, the microstructures of magnesium alloy near the coating/alloy interface at different zones of FSW joint was not changed by microarc discharge process.

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42

Kolomeychenko, A. V., and A. V. Kozlov. "Increasing the wear resistance of aluminium alloy parts with the use of coatings modified with CuO nano-powder." Traktory i sel hozmashiny 80, no. 6 (June 15, 2013): 44–46. http://dx.doi.org/10.17816/0321-4443-65886.

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Coatings formed by microarc oxidation and modified by copper oxide nano-powder, as well as microhardness and thickness of coatings have been investigated. Findings of the investigation and results of comparative wear resistance tests are given.

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Zhou, Tong, Jie Liu, Xinwen Zhang, Bin Shen, Jinlong Yang, Wenbin Hu, and Lei Liu. "The antibacterial W-containing microarc oxidation coating on Ti6Al4V." Surface and Coatings Technology 374 (September 2019): 242–52. http://dx.doi.org/10.1016/j.surfcoat.2019.05.089.

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Wei, Kejian, Lin Chen, Yao Qu, Jiahao Yu, Xiaoyue Jin, Jiancheng Du, Wenbin Xue, and Jinlong Zhang. "Tribological properties of microarc oxidation coatings on Zirlo alloy." Surface Engineering 35, no. 8 (February 6, 2019): 692–700. http://dx.doi.org/10.1080/02670844.2019.1575001.

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Cagatay Oter, Z., Yunus Azakli, Sezgin Cengiz, Yücel Gencer, and Mehmet Tarakci. "Microarc oxidation of pure aluminium in alumina containing electrolytes." Surface Engineering 36, no. 8 (December 6, 2019): 837–46. http://dx.doi.org/10.1080/02670844.2019.1698162.

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LI, Wen-fang, Bing HAN, Jun DU, Ji-hua PENG, and Yin-hui GAO. "Structural characteristics of BaTiO3 films prepared by microarc oxidation." Transactions of Nonferrous Metals Society of China 16, no. 5 (October 2006): 1041–44. http://dx.doi.org/10.1016/s1003-6326(06)60374-9.

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Xue, Wenbin, Jiancheng Du, Xiaoling Wu, and Yongchun Lai. "Tribological Behavior of Microarc Oxidation Coatings on Aluminum Alloy." ISIJ International 46, no. 2 (2006): 287–91. http://dx.doi.org/10.2355/isijinternational.46.287.

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Berdikov, V. F., O. I. Pushkarev, and V. A. Fedorov. "Deposition of ceramic alumina coatings using microarc electric oxidation." Refractories and Industrial Ceramics 38, no. 1 (January 1997): 19–20. http://dx.doi.org/10.1007/bf02768228.

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Wu, Xiaohong, Wei Qin, Bo Cui, Zhaohua Jiang, and Weiqiang Lu. "Black Ceramic Thermal Control Coating Prepared by Microarc Oxidation." International Journal of Applied Ceramic Technology 4, no. 3 (July 2007): 269–75. http://dx.doi.org/10.1111/j.1744-7402.2007.02140.x.

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Chernyshev, Yu I., Yu L. Krylovich, L. L. Karmanov, and G. Kh Grodnikas. "Special features of anodic microarc oxidation of aluminium components." Welding International 6, no. 5 (January 1992): 403–4. http://dx.doi.org/10.1080/09507119209548210.

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