Composite coatings formed by plasma electrolytic oxidation

Minaev, Alexander N.; Gnedenkov, Sergey V.; Sinebryukhov, Sergey L.; Mashtalyar, D. V.; Сидорова, М В; Tsvetkov, Yu. V.; Самохин, А. В.

doi:10.1134/s2070205111070112

Cited by 19 publications

(5 citation statements)

References 5 publications

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“…Unfortunately, it is not easy to produce durable surface seals via a post-treatment of this type and there has been an extensive investigation into approaches to controlling the PEO process so as to create graded, duplex or hybrid structures within the coating. These have included gradients of phase constitution [82,83], incorporation of polymeric layers [84] and various kinds of composite coatings [85,86], as well as macroscopic structures such as metal-cored ceramic fibre networks [87]. In general, while these are all interesting possibilities, none have so far entered into mainstream usage.…”

Section: Duplex Composite and Graded Peo Structuresmentioning

confidence: 99%

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

Clyne

Troughton

2018

International Materials Reviews

416

225

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The review describes recent progress on understanding and quantification of the various phenomena that take place during plasma electrolytic oxidation, which is in increasing industrial use for production of protective coatings and other surface treatment purposes. A general overview of the process and some information about usage of these coatings are provided in the first part of the review. The focus is then on the dielectric breakdown that repeatedly occurs over the surface of the work-piece. These discharges are central to the process, since it is largely via the associated plasmas that oxidation of the substrate takes place and the coating is created. The details are complex, since the discharge characteristics are affected by a number of processing variables. The interrelationships between electrical conditions, electrolyte composition, coating microstructure and rates of growth, which are linked via the characteristics of the discharges, have become clearer over recent years and these improvements in understanding are summarised here. There is considerable scope for more effective process control, with specific objectives in terms of coating performance and energy efficiency, and an attempt is made to identify key points that are likely to assist this.

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Section: Duplex Composite and Graded Peo Structuresmentioning

confidence: 99%

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

Clyne

Troughton

2018

International Materials Reviews

416

225

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“…Moreover, sealing of the porous part of the coating by PTFE powder improves greatly the anticorrosion properties of Mg implants in physiological solution. Additional prospects of using organic and inorganic nanosized materials in the process of the formation of surface multifunctional composite protective layers obtained using plasma electrolytic oxidation on metals and alloys are discussed in the paper of Minaev et al [135]. Dou et al [136] prepared a bioactive micro-arc oxidation/chitosan (MAO/CS) composite coating on Mg-Zn-Ca (Mg-1.75Zn-0.56Ca) alloy for orthopaedic applications.…”

Section: Sample No Coating Type L C2 (N) L C3 (N) Number Of Cyclesmentioning

confidence: 99%

Promising Methods for Corrosion Protection of Magnesium Alloys in the Case of Mg-Al, Mg-Mn-Ce and Mg-Zn-Zr: A Recent Progress Review

Predko

Rajnović

Grilli

et al. 2021

Metals

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High specific strength characteristics make magnesium alloys widely demanded in many industrial applications such as aviation, astronautics, military, automotive, bio-medicine, energy, etc. However, the high chemical reactivity of magnesium alloys significantly limits their applicability in aggressive environments. Therefore, the development of effective technology for corrosion protection is an urgent task to ensure the use of magnesium-containing structures in various fields of application. The present paper is aimed to provide a short review of recent achievements in corrosion protection of magnesium alloys, both surface treatments and coatings, with particular focus on Mg-Al-Mn-Ce, Mg-Al-Zn-Mn and Mg-Zn-Zr alloys, because of their wide application in the transport industry. Recent progress was made during the last decade in the development of protective coatings (metals, ceramics, organic/polymer, both single layers and multilayer systems) fabricated by different deposition techniques such as anodization, physical vapour deposition, laser processes and plasma electrolytic oxidation.

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“…The possible solution of the problem of enhancing anticorrosion characteristics and increasing wear resistance of magnesium alloys consists in application of the PEO method, which enables one to deposit protective films of a thickness of a few dozens of microns, thus improving the characteristics of the treated material without virtually any changes in the oxidized details size [6][7][8][9]. The composition of the electrolyte used in PEO is determining for the properties of coatings formed by this method.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, suspensions, in addition to true solutions, have been used as electrolytes for this method. Introduction of nanosized particles, which become embedded into the coating without changing its properties, into the electrolyte composition appears to be promising direction of the PEO method development [4,[6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Coatings on the Surface of Magnesium Alloy by Plasma Electrolytic Oxidation Using ZrO₂ and SiO₂ Nanoparticles

Gnedenkov

Sinebryukhov

Mashtalyar

et al. 2015

Journal of Nanomaterials

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Results of investigation of the incorporation of zirconia and silica nanoparticles into the coatings formed on magnesium alloy by plasma electrolytic oxidation are presented. Comprehensive research of electrochemical and mechanical properties of obtained coatings was carried out. It was established that the polarization resistance of the samples with a coating containing zirconia nanoparticles is two times higher than that for the sample with base PEO layer. One of the important reasons for improving the protective properties of coatings formed in electrolytes containing nanoparticles consists in enhanced morphological characteristics, in particular, the porosity decrease and increase of thickness and resistivity (up to two orders of magnitude for ZrO2-containing coating) of porousless sublayer in comparison with base PEO layer. Incorporation of silica and zirconia particles into the coating increases the mechanical performances. The layers containing nanoparticles have greater hardness and are more wear resistant in comparison with the coatings formed in the base electrolyte.

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Composite coatings formed by plasma electrolytic oxidation

Cited by 19 publications

References 5 publications

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

Promising Methods for Corrosion Protection of Magnesium Alloys in the Case of Mg-Al, Mg-Mn-Ce and Mg-Zn-Zr: A Recent Progress Review

Fabrication of Coatings on the Surface of Magnesium Alloy by Plasma Electrolytic Oxidation Using ZrO₂ and SiO₂ Nanoparticles

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Composite coatings formed by plasma electrolytic oxidation

Cited by 19 publications

References 5 publications

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

Promising Methods for Corrosion Protection of Magnesium Alloys in the Case of Mg-Al, Mg-Mn-Ce and Mg-Zn-Zr: A Recent Progress Review

Fabrication of Coatings on the Surface of Magnesium Alloy by Plasma Electrolytic Oxidation Using ZrO2 and SiO2 Nanoparticles

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Fabrication of Coatings on the Surface of Magnesium Alloy by Plasma Electrolytic Oxidation Using ZrO₂ and SiO₂ Nanoparticles