Plasma electrolysis for surface engineering

Yerokhin, Aleksey; Nie, Xueyuan; Leyland, A.; Matthews, A.; Dowey, S.J.

doi:10.1016/s0257-8972(99)00441-7

Cited by 2,681 publications

(1,603 citation statements)

References 9 publications

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“…Specifically, PS and EB-PVD cannot be used for preparing sample coatings with complex shapes and, for industrial production, the sol-gel and electro-deposition should also not be used because of low efficiencies. The process of plasma electrolysis (PE), a new surface-treatment technique, has seen wide application in ceramic coating depositions on alloys [21,22]. PE processes comprise anode and cathode plasma electrolysis, depending on the discharge electrode.…”

Section: Methodsmentioning

confidence: 99%

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Influence of Solvent and Electrical Voltage on Cathode Plasma Electrolytic Deposition of Al2O3 Antioxidation Coatings on Ti-45Al-8.5Nb Alloys

Yang

Jiang

Ding

et al. 2018

Metals

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Al 2 O 3 coatings were prepared on Ti-45Al-8.5Nb alloys via cathodic plasma electrolysis deposition (CPED) in both 1.2 M Al(NO 3 ) 3 aqueous and ethanolic solutions. Different voltages were also applied during the deposition process to optimize coating properties. Coatings deposited in both solutions mainly consisted of γ-Al 2 O 3 , with some Al(OH) 3 found in coatings prepared in aqueous solution. Coatings prepared in ethanol solution exhibited better oxidation resistance at 900 • C as well as better substrate adhesion, which was mainly due to smaller crater sizes on coating surfaces. The deposition process was discussed in detail and the reason for the smaller craters examined. The results suggested that solution surface tension mainly influenced the average diameter of hydrogen bubbles that formed on cathode surfaces during the process. Smaller bubbles lead to both lower current densities on cathodes and smaller crater sizes on coatings.

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Section: Methodsmentioning

confidence: 99%

“…The process of plasma electrolysis (PE), a new surface-treatment technique, has seen wide application in ceramic coating depositions on alloys [21,22]. PE processes comprise anode and cathode plasma electrolysis, depending on the discharge electrode.…”

Section: Introductionmentioning

confidence: 99%

Influence of Solvent and Electrical Voltage on Cathode Plasma Electrolytic Deposition of Al2O3 Antioxidation Coatings on Ti-45Al-8.5Nb Alloys

Yang

Jiang

Ding

et al. 2018

Metals

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“…It has been widely used by active companies, such as Keronite (UK), Magoxid-Coat (Germany), and Microplasmic (USA), active in commercial development of PEO technology [23]. Primarily used for pure aluminum or alloyed [23][24][25][26][27][28][29][30] aluminum treatments, PEO was applied recently for the oxidation of magnesium and its alloys [29][30][31][32][33] and titanium and its alloys [34][35][36][37][38][39][40][41][42][43][44] as well as niobium [45][46][47], zirconium [48][49][50][51], and tantalum [52][53][54][55]. In recent years, titanium and its alloys used as biomaterials drew the attention of numerous teams of researchers in the world.…”

Section: Introductionmentioning

confidence: 99%

Development of copper-enriched porous coatings on ternary Ti-Nb-Zr alloy by plasma electrolytic oxidation

Rokosz

Hryniewicz

Raaen

et al. 2016

Int J Adv Manuf Technol

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In this paper, a preparation method and characteristics of porous coatings enriched in copper distributed in the whole volume on a ternary Ti-Nb-Zr alloy biomaterial obtained by plasma electrolytic oxidation (PEO) in an electrolyte containing H 3 PO 4 within Cu(NO 3 ) 2 at potentials of 180 and 450 V are presented. It has been shown that the PEO potential has impact on the thickness of the coatings, i.e., the higher the potential used, the thicker the coating obtained. Using XPS study, it was shown that copper inside the coating appears as Cu + and Cu 2+ ions, while titanium, niobium, and zirconium appear as Ti 4+ , Nb 5+ , and Zr x+ (x ≤ 2), respectively. It was also found that the roughness of PEO coating formed at 450 V is higher than the one obtained at 180 V, and it is well correlated with bigger pores after the PEO treatment. Additionally, in this paper two PEO coating models composed of three sub-layers are presented. The thickness of the outer top porous sub-layer obtained after PEO oxidation at both 180 and 450 V equals to about 2 μm, while the semi-porous as well as transition sub-layers are thicker after PEO processing at 450 V (5 μm) than those obtained at 180 V (4 μm thick). The creation of the top porous and transition compact sub-layer of PEO coating may be explained by switch-on and switch-off of the PEO potential, while the middle and semi-porous sub-layers are most likely formed during the stable voltage conditions of PEO treatment.

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“…Plasma electrolytic oxidation (PEO), also called plasma electrolytic deposition, micro-arc oxidation, pulse plasma anodization or spark anodization, is a novel method to produce hard and corrosionresistant ceramic coatings on Al, Mg, Ti, Zr and other light metals as well as their alloys [11]. The PEO method utilizes the formation of micro-arc plasma discharges on the surface of the workpiece treated in an electrolytic aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Deposition, characterization and performance evaluation of ceramic coatings on metallic substrates for supercritical water-cooled reactors

Hui

Cook

Sun

et al. 2011

Surface and Coatings Technology

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. A series of ceramic coatings have been prepared on P91 substrates by spray pyrolysis processes and on Zr-2.5Nb substrates by a plasma electrolytic oxidation process. Preliminary results show that coatings obtained with different solution compositions and procedures can reduce the oxidation weight gain of P91 samples by factors of 2-10 for exposure times up to 500 h in deaerated supercritical water at 500°C and 25 MPa. Results also show that the weight gain of a P91 sample with an alumina (Al 2 O 3 ) coating is about nine times less than that of uncoated P91 after exposures for 400 h in deaerated supercritical water at 650°C and 25 MPa. These results indicate that the Al 2 O 3 coating shows promising results for preventing oxidation of P91 under supercritical water conditions. The samples with ceramic coatings on Zr-2.5Nb substrates show marginally improved corrosion resistance compared to the bare substrates.Crown

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Plasma electrolysis for surface engineering

Cited by 2,681 publications

References 9 publications

Influence of Solvent and Electrical Voltage on Cathode Plasma Electrolytic Deposition of Al2O3 Antioxidation Coatings on Ti-45Al-8.5Nb Alloys

Influence of Solvent and Electrical Voltage on Cathode Plasma Electrolytic Deposition of Al2O3 Antioxidation Coatings on Ti-45Al-8.5Nb Alloys

Development of copper-enriched porous coatings on ternary Ti-Nb-Zr alloy by plasma electrolytic oxidation

Deposition, characterization and performance evaluation of ceramic coatings on metallic substrates for supercritical water-cooled reactors

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