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Journal articles on the topic 'Micro-arc oxidation coatings'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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1

Chen, Yue Liang, Yong Zhang, Yan Li, and Tai Feng Zhang. "Influences of Micro-Arc Oxidation on Pre-Corroded Fatigue Property of Magnesium Alloy AZ91D." Advanced Materials Research 152-153 (October 2010): 51–57. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.51.

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The surface morphologies of micro-arc oxidation coatings and chemical oxidation coating formed on AZ91D alloy were observed by scanning electron microscopy. The fatigue properties of both specimens with micro-arc oxidation coatings and chemical oxidation coating after the pre-corroded treatments in neutral salt spray test were investigated comparatively. The result shows that pre-corrosion treatment decreases the fatigue life, but the pre-corroded fatigue life of specimens with chemical oxidation is lower than that with micro-arc oxidation. The thickness of micro-arc oxidation coatings has no
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2

Zhu, Li Hua, Xiao Jing Xu, Xiao Ya Niu, Ting Zhuo Chen, and Min Liu. "Surface Properties of TiNi Alloy Treated by Micro-Arc Oxidation under Different Voltages." Advanced Materials Research 1053 (October 2014): 21–29. http://dx.doi.org/10.4028/www.scientific.net/amr.1053.21.

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The effects of micro-arc oxidation (MAO) voltage (370V, 400V, 420V) on the surface morphology, adhesion of film/substrate, corrosion resistance and fretting friction and wear properties after micro-arc oxidation and heat-treatment for 48h of TiNi alloy were investigated. The results show that, as the voltage gradually increases: (1) micro-arc oxidation coatings form, when the voltage increase to 420V, the coating shows a significant micro-arc oxidized porous characteristics; (2) the Ca/P ratio in the coatings also increases, so the Ca/P ratio can be controlled by adjusting the voltage of micro
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3

Safa Yilmaz, Mustafa, Gökhan Özer, Orhan Şahin, and Ahmet Karaaslan. "Micro Arc Oxidation Coating Parameter-Property Relationship." Materials Performance 60, no. 1 (2021): 40–44. https://doi.org/10.5006/mp2021_60_1-40.

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Micro arc oxidation coatings were produced on AA7075 (UNS A97075) substrates using various process parameters. The study aimed to improve the surface characteristics of the alloy. Thickness, hardness, and roughness measurements characterized the coatings. It was revealed that the coating thickness was directly related to the coating roughness. Various aluminum oxide (Al2O3) phases were detected in the coatings, and phase density differences were determined. Variations in the hardness of the coatings depended on the phase distribution, porosity, and presence of microcracks. Scanning electron mi
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4

Wu, Pei Nian, J. J. Xi, Jun Zhao, and T. J. Wang. "Preparation of Compact Micro-Arc Oxidation Coatings on Aluminum Alloys." Applied Mechanics and Materials 33 (October 2010): 492–95. http://dx.doi.org/10.4028/www.scientific.net/amm.33.492.

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In this paper, a hard and thin coating with no loose layer was formed on the surface of the aluminum LC4 by bipolar micro-arc oxidation power, and the influence of ratio J of the negative current density to the positive current density on the thickness h and the hardness H of micro-arc oxidation coatings was studied. By SEM and other modern materials testing and analyzing techniques, the microstructures of the micro-arc oxidation ceramic coatings were tested and analyzed. It was showed that the micro-structure is compact, and the ceramic coating almost has non-porous layer.
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5

Yin, Yu Jun, Shu Hua Li, Da Wei Shen, Yuan Yuan Zu, and Chang Zheng Qu. "Effects of Al2O3 Nanoparticles on Microstructure and Performance of Ceramic Coatings by Micro-Arc Oxidation." Key Engineering Materials 537 (January 2013): 92–96. http://dx.doi.org/10.4028/www.scientific.net/kem.537.92.

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A dense ceramic oxide coating approximately 45 µm thick was prepared on a Ly12 aluminum alloy by micro-arc oxidation in an alkali-phosphate electrolytic solution. Coating thickness and surface roughness (Ra) were measured after the coating had been synthesized. The effects of Al2O3 Nanoparticles in electrolyte on phase composition, microstructure and microhardness of the micro-arc oxidation ceramic coatings on Ly12 aluminum alloy were investigated by means of XRD, SEM and hardness experimentation. The results show that the ceramic coatings become more dense and its microhardness increased by a
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6

Xie, Nian Suo, and Jin Wang. "Study on Properties of Al2TiO5 Coating on Ti-6Al-4V Titanium Alloy." Key Engineering Materials 575-576 (September 2013): 348–51. http://dx.doi.org/10.4028/www.scientific.net/kem.575-576.348.

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The Al2TiO5Coating was deposited on Ti-6Al-4V alloy substrate by homemade micro-arc oxidation system. The microstructure of Ti-6Al-4V titanium alloy, the phase of coating, the bonding force of the coating and matrix, sulfuric acid corrosion resistance and high-temperature oxidation resistance were study by inverted microscope model, Xray diffract meter, scanning electron microscopy, the coating adhesion automatic scratch tester, box-type furnace. The results show that the phase of coating is composed of Al2TiO5and Al2SiO5, and Al2TiO5.is the main component, the coating surface consists of disc
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7

Xi, Jian Jun, Jun Zhao, and Guo Jun Niu. "Preparation and Performance of Micro-Arc Oxidation Ceramic Coating of Titanium Alloy in Low Current Density." Advanced Materials Research 335-336 (September 2011): 708–12. http://dx.doi.org/10.4028/www.scientific.net/amr.335-336.708.

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In this paper, Three types of electrolyte (phosphate, silicate, aluminum) are considered to make preparation for micro-arc oxidation coatings on titanium alloy by bipolar pulse MAO oxidation power with low power consumption (density of current less than 1A/dm2). Treated by micro-arc oxidation, dense micro-arc oxidation ceramic coating is formed on titanium alloy. Surface morphology and friction coefficient of MAO coating is analyzed. The research on the effect of NaF on ablation of MAO coating is prepared, which guides the configuration of the electrolyte later.
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8

Lu, Kai, Xiang Dong Liu, Ya Ping Zhang, and Wan Zhong Gao. "Effects of C6H8O7 and C3H8O3 in the Na2SiO3 Electrolyte on Characteristics of Coating Formed on ZAlSi12Cu2Mg1 by Micro-Arc Oxidation." Applied Mechanics and Materials 217-219 (November 2012): 1327–30. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1327.

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Micro-arc oxidation coating on ZAlSi12Cu2Mg1 alloy were prepared in Na2SiO3 electrolyte, effects of C6H8O7 and C3H8O3 as additive on resistances of micro-arc oxidation coatings were investigated. Results show that coatings containing completest ceramic particles were obtained on alloys surface processed in electrolyte solution including 2.0 g/L C6H8O7 additive, the size of micro-arc wholes becomes larger with more C6H8O7, and it has improved with 1ml/L C3H8O3 in the solution. The results of XRD analysis indicates that the coatings are mainly composed of alumina and mullite. EDS analysis showed
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9

Bayandinova, Moldir, Aidar Kenesbekov, Aynur Serikbaykyzy, Arnur Askhatov, Yelaman Batanov, and Nuraly Bazarov. "Development of biocompatible coatings for orthopedic joint implants." Physical Sciences and Technology 12, no. 1-2 (2025): 84–94. https://doi.org/10.26577/phst20251218.

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This article presents both theoretical and experimental approaches to the development of biocompatible coatings based on hydroxyapatite modified with titanium dioxide for orthopedic implants made from Ti 13Nb-13Zr titanium alloy. The primary objective was to enhance the adhesion, mechanical strength and antibacterial properties of the coatings by employing a combined technique: micro-arc oxidation followed by gas-thermal spraying. The influence of electrolyte composition and micro-arc oxidation parameters on the coating’s morphology, surface roughness and adhesion strength were systematically
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10

Zheng, Shun Qi, Li Ping Zhu, Gui Ru Chang, Chuang Lu, and Xiao Jing Li. "Performance of Ceramic Coating of MB3 Magnesium Alloy by Micro-Arc Oxidation." Advanced Materials Research 571 (September 2012): 38–42. http://dx.doi.org/10.4028/www.scientific.net/amr.571.38.

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Micro-arc oxidation (MAO) method was used for the surface modification of MB3 magnesium alloy. The morphology feature, phase composition, and chemical composition of the formed ceramic coatings were studied by metallographic microscope, scanning electron microscopy (SEM), XRD, respectively. Drop test has been applied to study the corrosion resistance of MB3 Mg alloy with and without micro-arc oxidation treatment. The present result indicates that, through MAO, ceramic coatings were in-situ fabricated on the surface of MB3 Mg alloy, the micro-arc oxidation coating is relatively dense and unifor
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11

Lin, Xiu Zhou, Min Hao Zhu, Zhen Bing Cai, J. F. Zheng, and Jin Fang Peng. "Microstructure and Reciprocating Sliding Tribological Performance of Micro-Arc Oxidation Coating Prepared on Al-Si Alloy." Advanced Materials Research 97-101 (March 2010): 1518–26. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.1518.

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Micro-arc oxidation coatings were prepared on Al-Si alloys surface by using a self-made micro-arc oxidation equipment. Its characterizations were systematically detected by Vickers hardness tester, profilometer, scanning electron microscope (SEM), energy dispersive X-ray spectrum (EDX), X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS). Reciprocating sliding tribological tests without lubricant of the micro-arc oxidation coating and its substrate alloy have been carried out under normal load of 5 N and displacement amplitudes of 2 mm. Dynamic analyses in combination with mi
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12

Guo, Yu Peng, Shi Chun Di, and Hong Wei Lv. "Microstructure and Properties of TA1 TIG Joint via Micro-Arc Oxidation." Advanced Materials Research 1120-1121 (July 2015): 1287–91. http://dx.doi.org/10.4028/www.scientific.net/amr.1120-1121.1287.

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This paper applied the micro-arc oxidation technology to TIG weld joint based on titanium alloy. The optical microscope, SEM, XRD and polarization curve were used to analyze the joints metallographic phase, the coating morphology, the phase composition and corrosion resistance. Research results showed that the grain was grew gradually coarser from base metal to joint. The joint surface obtained a uniform morphology after micro-arc oxidation. The joint and base metal was made up of α-Ti and their coatings are mainly composed by rutile-TiO2. The surface morphology and phase composition are simil
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13

Lin, Xiu Zhou, Min Gong, Zhao Hua Wang, and Peng Zhang. "Preparation and Corrosion Behaviour of Micro-Arc Oxidation Coating on Ti6Al4V Alloy." Advanced Materials Research 621 (December 2012): 117–20. http://dx.doi.org/10.4028/www.scientific.net/amr.621.117.

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Micro-arc oxidation (MAO) coatings were prepared on Ti6Al4V alloys surface by using self-made micro-arc oxidation equipment. Its characterizations were systematically detected by Vickers hardness tester, scanning electron microscope (SEM), X-ray diffractometer (XRD) and X-ray fluorescence spectrometer (XFS). Corrosion behaviour of MAO coating and Ti6Al4V alloy in Hank's simulated body fluid were studied comparatively using electrochemical workstations and salt spray test chamber. The experimental results indicated that the MAO coating, with rough surface, high hardness and typical porous ceram
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14

Wang, Shuliang, Xiaofei Peng, Yi Yang, et al. "Insight into Microstructure Evolution and Corrosion Mechanisms of K2ZrF6/Al2O3-Doped Hot-Dip Aluminum/Micro-Arc Oxidation Coatings." Coatings 13, no. 9 (2023): 1543. http://dx.doi.org/10.3390/coatings13091543.

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In this study, we investigated the impact of K2ZrF6/Al2O3 composite additives on the microstructure evolution and corrosion behavior of ceramic coatings formed through micro-arc oxidation (MAO) treatment on hot-dip aluminum-coated 316L stainless steel surfaces. Our findings revealed the successful preparation of micro-arc oxidation ceramic coatings, presenting a dual-layer structure consisting of a porous micro-arc oxidation ceramic outer layer and a relatively dense/thick hot-dip aluminum inner layer. The incorporation of K2ZrF6/Al2O3 composite additives induced a self-sealing effect on the c
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15

Yan, Zhi Jun, Xin He Zhu, Dong Cheng, Yu Zhou Gao, and Li Yan. "The Study on the Deposition Efficiency of Microarc Oxidation on Aluminum Alloy." Key Engineering Materials 373-374 (March 2008): 268–72. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.268.

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With excellent wear resistance and corrosion resistance of films, simple procedures, high production efficiency and being environmentally friendly, micro-arc oxidation has become a novel technique to produce ceramic coatings on the surfaces of light metals such as aluminum and its alloys. In order to decrease the electric power consumption during the process, we put forward a improved technique of micro-arc oxidation, and introduce its technical properties and treatment effects on the surfaces of aluminum. The experimental results show that the properties, such as phase structure, thickness, r
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16

Kozelskaya, Anna I., Sven Rutkowski, Johannes Frueh, et al. "Surface Modification of Additively Fabricated Titanium-Based Implants by Means of Bioactive Micro-Arc Oxidation Coatings for Bone Replacement." Journal of Functional Biomaterials 13, no. 4 (2022): 285. http://dx.doi.org/10.3390/jfb13040285.

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In this work, the micro-arc oxidation method is used to fabricate surface-modified complex-structured titanium implant coatings to improve biocompatibility. Depending on the utilized electrolyte solution and micro-arc oxidation process parameters, three different types of coatings (one of them—oxide, another two—calcium phosphates) were obtained, differing in their coating thickness, crystallite phase composition and, thus, with a significantly different biocompatibility. An analytical approach based on X-ray computed tomography utilizing software-aided coating recognition is employed in this
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17

Li, Mu Qin, Jiang Liu, Jun Gang Li, Ding Sen Cai, and Yong Hui Zhao. "Influence of HF-SCG Immersion Treatment on Corrosion Resistance of the Ultrasonic Micro-Arc Oxidation Bio-Coating on Pure Magnesium." Key Engineering Materials 633 (November 2014): 402–5. http://dx.doi.org/10.4028/www.scientific.net/kem.633.402.

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Ceramic coatings were fabricated on pure magnesium in silicate electrolyte system by ultrasonic micro-arc oxidation (UMAO) process, and then silica sol (CSG) and HF-CSG treatment were carried out on micro-arc oxidation coatings. The corrosion potential (Ecorr) and corrosion current density (Icorr) of the compound coatings were analyzed by electrochemical corrosion workstation. The corrosive morphology of the coatings was observed by scanning electron microscopy (SEM). Results showed that the Ecorr of the coating with CSG and HF-CSG treatment increased by 55 mV and 69 mV respectively in compari
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18

Qiu, Ji, Xiang Bo Suo, Shi Ning Ma, Gang Shuai, and Hong Mei Wang. "A Effects of Nano-Particles Additives on Wear Performance of Micro-Arc Oxidation Coating Prepared on 2A12 Aluminum Alloy." Advanced Materials Research 1120-1121 (July 2015): 735–39. http://dx.doi.org/10.4028/www.scientific.net/amr.1120-1121.735.

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Nano-particle reinforced composite coatings were prepared on 2A12 aluminum alloy by micro-arc oxidation and the effect of nano particles on wear performance of coating was studied. By means of SEM, CETR micro-nano-indenter friction and wear tester and white-light interferometer, the surface morphology and the friction and wear property were tested. Results showed that compared with the coating without nano-particle addition, the size and amount of pores on coatings were decreased substantially after additon with 20nm nano-SiO2 particles, 80nm nano-SiO2 particles and 80nm nano-TiO2 particles, a
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19

Chen, Yuke, та Meini Yuan. "Effect of α-Al2O3 Additive on the Surface Micro-Arc Oxidation Coating of Ti6Al4V Alloy". Nanomaterials 13, № 11 (2023): 1802. http://dx.doi.org/10.3390/nano13111802.

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α-Al2O3 nanoparticles can enter a micro-arc oxidation coating and participate in the coating-formation process through chemical reaction or physical–mechanical combination in the electrolyte. The prepared coating has high strength, good toughness and excellent wear and corrosion resistance. In this paper, 0, 1, 3 and 5 g/L of α-Al2O3 nanoparticles were added to a Na2SiO3-Na(PO4)6 electrolyte to study the effect on the microstructure and properties of a Ti6Al4V alloy micro-arc oxidation coating. The thickness, microscopic morphology, phase composition, roughness, microhardness, friction and wea
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20

Grigoriev, Sergey, Nikita Peretyagin, Andrey Apelfeld, et al. "Investigation of the Characteristics of MAO Coatings Formed on Ti6Al4V Titanium Alloy in Electrolytes with Graphene Oxide Additives." Journal of Composites Science 7, no. 4 (2023): 142. http://dx.doi.org/10.3390/jcs7040142.

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Coatings with a thickness from ~40 to ~50 µm on Ti6Al4V titanium alloy were formed by micro-arc oxidation in a silicate-hypophosphite electrolyte with additions of graphene oxide. Micro-arc oxidation treatment was carried out in the anode–cathode mode (50 Hz) with a ratio of anode to cathode currents of 1:1, a total density of 20 A/dm2, and a treatment duration of 30 min. The effect of the graphene oxide concentration in electrolytes on the thickness, roughness, hardness, surface morphology, structure, composition of micro-arc oxidation coatings, and its electrochemical corrosion behavior in 3
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21

Yao, Ying Xue, Li Qun Li, and Jian Jun Xi. "Preparation and Performance of Ceramic Coatings Formed by Micro Arc Oxidation on Titanium Alloy." Key Engineering Materials 375-376 (March 2008): 323–27. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.323.

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The effect of technological parameters on MAO ceramic coating were investigated through the technique of micro-arc oxidation (MAO) on TC4 titanium alloy and. Microstructure and morphology of coatings were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The result shows that electric parameters and compositions of the electrolyte have notable effects on the growth of MAO ceramic coatings. The cathodic and anodic voltage rise gradually with the oxidation time increasing. The growth rate of ceramic coating is fast at the beginning, and then turns slowly. The ceramic coa
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22

Jia, Bohao, Ruoqi Ren, Hongliang Zhang, et al. "Research Advancements of Wear-Resistant Coatings Fabricated on Aluminum and Its Alloys." Coatings 15, no. 7 (2025): 750. https://doi.org/10.3390/coatings15070750.

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The low hardness and insufficient wear resistance of aluminum and its alloys restrict their broader application in various fields. The application of surface protective coatings can effectively enhance the hardness and wear resistance of aluminum and its alloys. This article provides a comprehensive review of the recent research progress of wear-resistant coatings fabricated on aluminum and its alloys. The relevant achievements in the recent research works of preparing wear-resistant coatings by one-step methods (such as anodic oxidation, micro-arc oxidation, cold spraying, plasma spraying, an
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23

Qi, Xiaoben, Hailong Shang, Bingyang Ma, Rulin Zhang, Leyang Guo, and Bo Su. "Microstructure and Wear Properties of Micro Arc Oxidation Ceramic Coatings." Materials 13, no. 4 (2020): 970. http://dx.doi.org/10.3390/ma13040970.

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The interaction effect of micro arc oxidation (MAO) parameters on the microstructure and wear properties was investigated. The results showed that the electric current and oxidation time significantly influenced the thickness and grinding crack width of the ceramic coatings within the range of the selected parameters, and the interaction effect of the electrical parameters was not obvious. The surface morphology, cross-section morphology, and element distribution of the coatings were observed using scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) and X-ray diffracti
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24

Zhang, Yun Long, Cheng Hai Li, Ming Hu, and Yu Min Zhang. "Influence of Na2SiO3 Concentration on the Corrosion Behavior of TC4 Ceramic Coatings." Advanced Materials Research 971-973 (June 2014): 85–88. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.85.

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The micro-arc oxidation technology were utilized to fabricated the ceramics coating in order to improve the corrosion resistance of Ti–6Al–4V alloy (TC4). The sodium silicate solution was introduced into the electrolyte solution for increasing the coating properties. The effect of the sodium silicate content on the phase composition, surface morphology and potentiodynamic polarization behavior was investigated. The results showed that the increase of Na2SiO3 concertration was benefit to improve corrosion resistance of the MAO coating of TC4 alloy. Key words: Micro-arc oxidation, Ceramic Coatin
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25

Li, Hong Xia, Ren Guo Song, and J. Zhao. "Structure and Mechanical Properties of Ceramic Coatings Fabricated by Micro-Arc Oxidation." Advanced Materials Research 47-50 (June 2008): 554–57. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.554.

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Al2O3 ceramic coatings were directly prepared on 6063 aluminum alloy in borate electrolytes by micro-arc oxidation (MAO) technique. The phase composition, microstructure, elemental distribution, and micro-hardness of Al2O3 ceramic coatings were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and micro-hardness test. XRD results show that the coating consists of α-Al2O3 and γ-Al2O3. SEM results show that the pores with different sizes distributed all over the coating surface. Adhesion and tribological and wear tests were also performed. It was found that ceramic
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26

Manoj, Aluri, M. M. Basha, S. M. Basha, and M. R. Sankar. "A Review - Black Oxide Coating on Metal Substrates of Steels, Aluminium, Magnesium and Copper." Advances in Science and Technology 106 (May 2021): 46–53. http://dx.doi.org/10.4028/www.scientific.net/ast.106.46.

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Aluminium, magnesium, copper, steels and their alloys are generally used in vast applications like automobile, ship, architecture, aerospace due their properties of high strength to weight ratio, good toughness, ease of recycling and good thermal conductivity. In practical applications, surface treatment is required to meet design requirements and also improves the long-term corrosion resistance and functionality. To enhance surface properties electro deposition, sol-gel, anodization and gas phase deposition are causally used in many industries. For achieving better results, one of the alterna
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27

Zhang, Yong, Wei Yang, Sen Yu, et al. "Microstructure and Properties in Simulated Seawater of Copper-Doped Micro-arc Coatings on TC4 Alloy." Coatings 12, no. 7 (2022): 883. http://dx.doi.org/10.3390/coatings12070883.

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Micro-arc oxidation (MAO) ceramic coatings were prepared on TC4 titanium alloys by adding CuSO4 to a (NaPO3)6 base solution. The microstructures of the MAO coatings were characterized by scanning electron microscopy (SEM), energy dispersive (EDS), and X-ray photoelectron spectroscopy (XPS). The corrosion resistance and wear resistance of these coatings were evaluated via hydrochloric acid immersion of weight deficit and friction tests. Those results indicated the presence of Cu in the MAO coating in the form of CuO and Cu2O. Incorporation of CuSO4 results in a thickness and roughness increase
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28

Li, Yankun, Rui Luo, Quanming Zhao, et al. "Preparation and characterization of cobalt–titanium dioxide on the surfaces of titanium implants." Materials Express 12, no. 7 (2022): 878–85. http://dx.doi.org/10.1166/mex.2022.2234.

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Titanium and its alloys are widely used in orthopedic implant materials due to their excellent mechanical properties and good biocompatibilities. However, titanium lacks biological activity and is prone to complications, such as loosening and sinking after implantation. Modifying the surface of titanium can improve its biological activity. In this study, we prepared a cobalt–titania (Co–TiO2) coating on a titanium surface by means of micro-arc oxidation technology. Scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), X-ray photoelectron energy spectrometr
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29

Xi, Jian Jun, and Jun Zhao. "Influence of Organic Sealed on the Corrosion Behaviors of Micro Arc Oxidation Coated ZM5 Magnesium Alloy." Advanced Materials Research 418-420 (December 2011): 844–47. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.844.

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An attempt was made to produce organic sealed micro arc oxidation coatings on ZM5 magnesium alloy using two different kinds of organic solution which are acrylics and PTFE. The thickness, potentiodynamic polarization test, corrosion weight lost and morphologies of the coatings were investigated. The results indicate that PTFE sealed micro arc oxidation coatings has relatively dense and uniform surface to show the best anti-corrosion performance.
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30

Lv, Peng Xiang, Shi Chun Di, Guan Xin Chi, Dong Bo Wei, and Jin Cheng Liu. "Forming Ceramic Coating on Al2024 by Scanning Micro-Arc Oxidation." Applied Mechanics and Materials 42 (November 2010): 485–88. http://dx.doi.org/10.4028/www.scientific.net/amm.42.485.

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Micro-arc oxidation (MAO) is a novel technique to deposit ceramic coatings on the surface of valve metals such as Al, Mg, Ti and their alloys. The oxide films prepared by this technique have a dense structure, high adhesion and excellent integrated mechanical properties. This technique is especially suitable for the surface treatment of machine parts that work at high speed and have a higher demand for resistance to wear and corrosion. There have been many studies in this field in the last few years. The development of micro-arc oxidation and its applications in industrial field was reviewed.
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31

Guo, Yong Chun, Jian Ping Li, Jin Shan Li, and Ping Wang. "Growth Process and Corrosion Resistance of Ceramic Coatings of Micro-Arc Oxidation on Mg-Nd Magnesium Alloys." Advanced Materials Research 189-193 (February 2011): 891–96. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.891.

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The regulation of ceramic coating formed by micro-arc oxidation on Mg-3Nd-0.2Zn-0.4Zr(wt%) magnesium alloys has been investigated by SEM and XRD. The relation of phase structure and corrosion resistance of MgO coating formed by micro-arc oxidation in different growth stages has been analyzed. The results have shown that in the initial stages of micro-arc oxidation, the growth of coating accords with linear regularity, which is the stage of anodic oxidation controlled by electrochemical polarization. With elongated treated time and increased thickness of the coating, the growth of coating accor
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32

Gao, Jing Long, and Zhong Cai Shao. "The Effects of Graphite on Ceramic Coatings on LY12 Aluminium Alloys by Micro-Arc Oxidation." Advanced Materials Research 454 (January 2012): 126–29. http://dx.doi.org/10.4028/www.scientific.net/amr.454.126.

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LY12 aluminum alloy samples were treated by micro-arc oxidation in sodium metasilicate electrolytes with graphite powder. The effects of graphite concentration on thickness, roughness, friction coefficient and phase composite of ceramic coating were investigated. The results indicated that the roughness and friction coefficient of ceramic coatings increased linearly. However, the thickness decreased adding graphite powder. XRD analyses indicated that the ceramic coatings fabricated on the surface of aluminum alloys by micro-arc oxidization were composed of graphite phase. SEM showed that the p
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33

Ramazanova, Zh M., M. G. Zamalitdinova, M. Zh Baidauletova, and M. V. Kovalenko. "Effect of microarc oxidation on the properties of aluminum alloy samples." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 325, no. 2 (2022): 39–46. http://dx.doi.org/10.31643/2023/6445.16.

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Currently, modern manufacturing industries impose special requirements on structural materials such as aluminum, titanium, and their alloys. Various methods are used to improve the physicomechanical and corrosion properties of these materials. One of the promising ways to modify the surface in order to give it multifunctional properties is the treatment of micro-arc oxidation. A distinctive feature of the process is the formation of the oxide coatings on valve metals because of exposure to micro-arc discharges. At the same time, coatings with unique properties are formed. However, the effect o
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34

Su, Zhaowei, Rui Mu, Yonghui Cui, Hongda Zhu, Xuetian Li, and Zhongcai Shao. "Study on micro-arc oxidation coating of magnetic metal powder composite magnesium alloy." Anti-Corrosion Methods and Materials 67, no. 5 (2020): 501–8. http://dx.doi.org/10.1108/acmm-03-2020-2269.

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Purpose The purpose of this paper is to prepare composite micro-arc oxide coatings with better wear resistance and corrosion resistance. Design/methodology/approach A nickel powder composite micro-arc oxide film was prepared on the surface of the magnesium alloy by the method of organically combining ultra-fine Ni powder with micro arc oxidation film layer. In this experiment, the changes in the corrosion resistance and microstructure of the composite film layer after adding Ni powder were studied, and the effect of the addition of glycerin on the corrosion resistance of the film layer was ana
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Gao, Cheng, Jin Yong Xu, Xuan Yi Shi, Ya Juan Liu, Jing Chun Zhang, and Guo Rang Zhang. "Variable Parameter Processes of Micro-Arc Oxidation for Aluminium Alloy." Materials Science Forum 704-705 (December 2011): 1273–78. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.1273.

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In micro-arc oxidation process, ceramic coating had a rapid growth all along by the way of constant current oxidation, and ceramic coating had a low roughness by the way of constant voltage oxidation. But few research focus on the mixed control process of constant current oxidation and constant voltage oxidation. In this paper we propose a variable parameter process that can combine the advantages of constant current and constant voltage oxidation for the first time. The growth kinetics of different technics was analyzed according to the change law of current and voltage. Surface topographs of
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36

Kashin, Alexander D., Mariya B. Sedelnikova, Pavel V. Uvarkin, et al. "Functionalizing Diatomite-Based Micro-Arc Coatings for Orthopedic Implants: Influence of TiO2 Addition." Biomimetics 8, no. 3 (2023): 280. http://dx.doi.org/10.3390/biomimetics8030280.

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The method of micro-arc oxidation has been utilized to synthesize a protective biocompatible coating for a bioresorbable orthopedic Mg implant. This paper presents the results of comprehensive research of micro-arc coatings based on diatomite—a biogenic material consisting of shells of diatom microalgae. The main focus of this study was the functionalization of diatomite-based micro-arc coatings by incorporating particles of titania (TiO2) into them. Various properties of the resulting coatings were examined and evaluated. XRD analysis revealed the formation of a new magnesium orthosilicate ph
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Yan, Ru Tang, Yuan Yuan Li, Chun Wei She, Hua Geng Li, and Hua Pan Li. "Research on Heavy-Duty Coating Protection System of Magnesium Alloy." Advanced Materials Research 1119 (July 2015): 525–28. http://dx.doi.org/10.4028/www.scientific.net/amr.1119.525.

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The poor corrosion resistance of magnesium alloys become the bottleneck restricting its development. Based on micro-arc oxidation (MAO) technology and the characteristics of fluorocarbon coating the surface of magnesium alloy build a high corrosion protection system, namely: Based on micro-arc oxidation coating fluorocarbon coatings. The formation of the composite coating through the resistance to ageing test through the resistance to ageing test, acid and alkali experiment and salt spray test results show the excellent corrosion resistance performance. Among them, the resistance to salt spray
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38

Baizhan, D. R. "BTAINING OF CALCIUM-PHOSPHATE COATINGS ON THE TITANIUM SURFACE BY MICRO-ARC OXIDATION." Eurasian Physical Technical Journal 20, no. 1(43) (2023): 34–41. http://dx.doi.org/10.31489/2023no1/34-41.

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The results of experiments on obtaining calcium-phosphate coatings on substrates of titanium grade VT1-0 by micro-arc oxidation (MAO) are presented. The coatings were obtained by adding different amounts of titanium oxide nanoparticles to the electrolyte. The microstructure and tribological properties of calcium phosphate coatings were investigated. In conducted research results have been established and determined optimal modes and parameters for obtaining calcium phosphate coatings. It is shown that the addition of titanium oxide nanoparticles to the electrolyte can affect the structure also
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Zhang, Chun Hua, Ming Lian Chen, Lei Zhou, Gong You Zhou, and Song Zhang. "Research of Micro-Arc Spark Deposition of Stellite Alloy on SCH13 Steel and High-Temperature Oxidation Property." Advanced Materials Research 631-632 (January 2013): 35–39. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.35.

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As is known to all, the technology is an effective way to improve the material surface performance. In this paper, Micro-arc spark deposition with stellite 6 alloy as the coating material on SCH13 steel substrates was carried out using high-energy micro-arc process. The microstructure, chemical composition, phase identification and hardness of the deposition layers were examined by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and Micro-hardness tester, respectively. Moreover, through high temperature oxidation, the property for the dep
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Ni, Er Xin, Ji Kang Yan, Yun Feng Wu, et al. "Effect of Thermal Oxidation Temperature on the Properties of Micro-Arc Oxidation Ceramic Coating on TC4 Alloy." Key Engineering Materials 697 (July 2016): 623–26. http://dx.doi.org/10.4028/www.scientific.net/kem.697.623.

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The effect of thermal oxidation temperature on the properties of MAO ceramic coating was investigated, The phase composition and surface morphology of composite oxidation coating were analyzed by XRD and SEM. The micro-hardness of composite oxidation coating were tested by micro hardness tester. The results shown that the composite oxidation coating consists of rutile, anatase Ti and HA. With the thermal oxidation temperature increasing, the micro-hardness of composite oxidation coatings were improved, but when the thermal oxidation temperature rose from 600 °C to 700 °C, the micro-hardness of
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41

Hao, Guo Dong, Yong Liang Guo, Xin Mei Zhang, Gang Liu, and Zhao Hua Jiang. "Preparation of Ceramic Composite Coatings on Ti-6Al-4V Alloy by Surface Nanocrystallization/Micro-Arc Oxidation." Key Engineering Materials 368-372 (February 2008): 1322–24. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1322.

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Nanostructured surface layer was produced on the Ti-6Al-4V alloy by surface mechanical attrition treatment (SMAT) technique, and then the ceramic composite coatings of surface nanocrystallization/ micro-arc oxidation (SNC/MAO) were prepared on the nanocrystallized surface of Ti-6Al-4V alloy by pulsed single-polar micro-arc oxidation in NaAlO2 solution. The phase composition, morphology of surface and section and element content of the nanostructured surface layer and the ceramic coatings were investigated by XRD, TEM, SEM and EDS, respectively. The results showed that after the SMAT technique
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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 wa
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Chen, Xian Ming, Cheng Ping Luo, and Jiang Wen Liu. "Study on the Formation Mechanism of Micro-Arc Oxidation Coatings on Magnesium Alloys." Materials Science Forum 650 (May 2010): 228–33. http://dx.doi.org/10.4028/www.scientific.net/msf.650.228.

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This article concerned with the formation mechanism of the micro-arc oxidization(MAO) coating on magnesium alloys. The micro-arc oxidation ceramic coating on AZ91 magnesium alloy was prepared in a silicate alkaline solution (Na2SiO3:5-30g/l, NaOH: 1-5g/l, KF: 5-8g/l, Na3C6H5O7: 0.5-2g/l, EDTA: 0.5-2g/l). The experiments were carried out in AC current galvanostatic mode with a current density of 20-50A/dm2. The microstructure of the MAO coating was characterized by means of transmission electron microscopy(TEM). Microcrystallite and/or nanocrystallite were found in the MAO coatings, the size of
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Kuznetsov, Yury, Aleksey Gribakin, Igor Kravchenko, et al. "Study of structure and microhardness of protective oxide-ceramic coatings obtained by micro-arc oxidation on deposited surfaces." Advanced Engineering Letters 3, no. 4 (2024): 164–72. https://doi.org/10.46793/adeletters.2024.3.4.3.

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The paper is devoted to studying the structure and microhardness of protective oxide-ceramic coatings obtained by micro-arc oxidation on the deposited surfaces of parts. Experimental researches were carried out with the use of the commonly used perfected methods and up-to-date measuring instruments and equipment. AlSi7Mg aluminum alloy was used to conduct the research and was deposited with various wires. A welding machine UDG-180 was used to surface the samples. Hardened layers were formed on the deposited surfaces in the developed electrolyte in an installation for micro-arc oxidation, worki
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Do, Le Hung Toan, Shuo Jen Lee, Duc Binh Luu, Quang Bang Tao, Nhu Thanh Vo, and Thanh Nghi Ngo. "Optimized Micro-Arc Oxidation Coating Thickness on ALZ Magnesium Lithium Alloy." Materials Science Forum 975 (January 2020): 37–42. http://dx.doi.org/10.4028/www.scientific.net/msf.975.37.

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Micro-arc oxidation (MAO) is known as a novel technique to use for the modifying the surface of valve metal, which improve mechanical and corrosion resistance properties. In this study, MAO coatings are fabricated on ALZ magnesium lithium alloy to protect the substrate from corrosion using environmentally friendly electrolytes under a high voltage power supply. The Taguchi method is used to identify the effects of current density, coating time and electrical frequency on the thickest coating uniformity. The optimum coating properties are characterized by coating thickness measurement, Scanning
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Zhou, Xiao Song, Xiao Yan Zhang, and De Feng Wu. "Effects of Nano-SiO2 in Electrolytes on Surface Properties of Micro-Arc Oxidation Ceramic Coatings Formed on New Casting Aluminum Alloy." Advanced Materials Research 581-582 (October 2012): 368–72. http://dx.doi.org/10.4028/www.scientific.net/amr.581-582.368.

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Ceramic coatings were fabricated on a new casting aluminum alloy during micro-arc oxidation by mixing nano-SiO2 into the phosphate electrolyte. The effects of nano-SiO2 in electrolyte on thickness, hardness and microstructure of the ceramic coatings were analyzed. The results show that nano-SiO2 is deposited on the surface layer of the ceramic coatings in micro-arc oxidation process. The compactness of the coatings is thus improved. Both the thickness and hardness of the ceramic coatings increase a lot. The optimal addition amount of nano-SiO2 in the electrolyte is 3g/L
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Shang, Wei, Zhou Lan Yin, Yu Qing Wen, and Xu Feng Wang. "Corrosion Behavior of the Composite Coatings Prepared on Magnesium Alloy AZ91 in Na2SO4 Solution." Advanced Materials Research 900 (February 2014): 522–25. http://dx.doi.org/10.4028/www.scientific.net/amr.900.522.

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The composite coatings were obtained on a magnesium alloy by micro-arc oxidation (MAO) and sol-gel technique. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of MAO coating and composite coatings in a 3.5% Na2SO4 solution. The results show that corrosion behavior of the MAO coating and composite coatings are different at different immersion times. The corrosion resistance of composite coatings is good than that of MAO coating.
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Lv, Peng Xiang, Guan Xin Chi, Dong Bo Wei, and Shi Chun Di. "Design of Scanning Micro-Arc Oxidation Forming Ceramic Coatings on 2024 Aluminium Alloy." Advanced Materials Research 189-193 (February 2011): 1296–300. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.1296.

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Micro-arc oxidation (MAO), also called plasma electrolytic oxidation (PEO), anodic spark deposition (ASD), or micro-arc discharge oxidizing (MDO), is an effective surface treatment technique which come from anodic oxidation technology. Via increasing the anodic voltage breaking through faraday area to a high stage accompanied by micro-arc discharge phenomenon, It indicated the ceramic coatings thickness increase along with the scanning times increase, while the thickness increment reduces. The phase composition, morphology and element distribution was studied by X-ray diffraction, scanning ele
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Luo, Jinheng, Na Shi, Ya-Zhe Xing, Chaoping Jiang, and Yongnan Chen. "Effect of Arc Power on the Wear and High-temperature Oxidation Resistances of Plasma-Sprayed Fe-based Amorphous Coatings." High Temperature Materials and Processes 38, no. 2019 (2019): 639–46. http://dx.doi.org/10.1515/htmp-2019-0003.

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AbstractAtmospheric plasma spraying (APS) technique is employed to prepare Fe-based amorphous coatings on T91 steel substrate under various arc powers of 30 kW, 35 kW and 40kW. The morphology and microstructure of both Fe-based powders and amorphous coatings are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). In addition, the wear resistance and high-temperature oxidation resistance of the plasma-sprayed coatings at various arc powers are studied. It is found that with increasing the arc power, the content of the porosity and the amorphous phase in the coatings
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Zhang, Rongfa, Sheng Zhong, Lilan Zeng, et al. "Novel Mg-Incorporated Micro-Arc Oxidation Coatings for Orthopedic Implants Application." Materials 14, no. 19 (2021): 5710. http://dx.doi.org/10.3390/ma14195710.

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In this study, Ti-6Al-4V alloy samples were processed by micro-arc oxidation (MAO) in phytic acid (H12Phy) electrolytes with the addition of different concentrations of EDTA-MgNa2 (Na2MgY) and potassium hydroxide (KOH). The surface characterization and cytocompatibility of MAO-treated samples were evaluated systematically. H12Phy is a necessary agent for MAO coating formation, and the addition of Na2MgY and KOH into the electrolytes increases the surface roughness, micropore size and Mg contents in the coatings. The MAO coatings are primarily composed of anatase, rutile, MgO and Mg3(PO4)2. Mag
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