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Mamaev, A. I.; Chekanova, Yu. Yu.; Ramazanova, Zh.M.

doi:10.1023/a:1026693531016

Cited by 5 publications

(3 citation statements)

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“…This group is tightly connected with equivalent circuit models which can be obtained from the impedance spectra and current-voltage characteristics. The circuits formed by resistive elements [84] are mainly used for DC EPPs, whereas those made by resistive and capacitive elements [85,86] can be used for pulsed PEO and the nonlinear circuits [80] which apply to AC PEO conditions.…”

Section: Model Classificationmentioning

confidence: 99%

Towards smart electrolytic plasma technologies: An overview of methodological approaches to process modelling

Парфенов

Yerokhin

Nev’yantseva

et al. 2015

Surface and Coatings Technology

158

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Article:Parfenov, E.V., Yerokhin, A., Nevyantseva, R. ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Abstract This paper reviews the present understanding of electrolytic plasma processes (EPPs) and approaches to their modelling. Based on the EPP type, characteristics and classification, it presents a generalised phenomenological model as the most appropriate one from the process diagnostics and control point of view. The model describes the system 'power supply -electrolyser -electrode surface' as a system with lumped parameters characterising integral properties of the surface layer and integral parameters of the EPP. The complexity of EPPs does not allow the drawing of a set of differential equations describing the treatment, although a model can be formalised for a particular process as a black box regression. Evaluation of dynamic properties reveals the multiscale nature of electrolytic plasma processes, which can be described by three time constants separated by 2-3 orders of magnitude (minutes, seconds and milliseconds), corresponding to different groups of characteristics in the model. Further developments based on the phenomenological approach and providing deeper insights into EPPs are proposed using frequency response methodology and electromagnetic field modelling. Examples demonstrating the efficiency of the proposed approach are supplied for EPP modelling with static and dynamic neural networks, frequency response evaluations and electromagnetic field calculations.

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Section: Model Classificationmentioning

confidence: 99%

Towards smart electrolytic plasma technologies: An overview of methodological approaches to process modelling

Парфенов

Yerokhin

Nev’yantseva

et al. 2015

Surface and Coatings Technology

158

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“…A study of microdischarge characteristics, especially their time dependence and thermal effects on the surface layers formed (in particular under AC regimes of PEO), remains therefore of great interest. Unfortunately, this issue was not properly addressed in any of the more recent works on AC PEO process characterization [17][18][19][20][21]. In this study, we shall, therefore, discuss a correlation between the oxide ceramic layer formation process and the spatial characteristics of microdischarges appearing at the surface of an Al alloy during AC PEO, and, also, estimate electrical parameters of the microdischarges and their thermal effect on the surface layer.…”

Section: Introductionmentioning

confidence: 98%

Discharge characterization in plasma electrolytic oxidation of aluminium

Yerokhin

Snizhko

Gurevina

et al. 2003

J. Phys. D: Appl. Phys.

430

199

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Digital video imaging of the plasma electrolytic oxidation (PEO) of aluminium has been performed, which allowed evaluation of both dimensional characteristics of individual microdischarges appearing at the oxide–electrolyte interface and their collective behaviour throughout the oxidation process. It has been shown that the microdischarge cross-sectional dimensions vary within the range 0.01–1.35 mm2. In the course of PEO processing, small localized events (<0.03 mm3) always dominate in the microdischarge spatial distribution and the relative proportion of medium-sized to very large microdischarges is gradually redistributed in favour of the latter. Temporal dependences have been found for the fraction of surface area instantaneously experiencing the discharge, as well as for the spatial and current densities of the microdischarge. Discharge mechanisms occurring during PEO are discussed and a model of microdischarge formation is suggested, assuming the possibility of free-electron generation and glow discharge ignition in the gaseous media developed at the oxide–electrolyte interface. First approximation evaluations of thermal processes in the oxide layer under the discharge conditions have been considered. The estimated ranges of the microdischarge current density (50–18 kA m−2) and duration (0.25–3.5 ms) sufficient for initiating phase transitions (e.g. γ–α transformation and melting) in the surface oxide layer are shown to be in good agreement with experimental data.

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“…However, for normal PEO process, owing to the breakdown of the compact oxide film, a new unblocked route is provided to transfer ions through the films; 14 thus upon breakdowns of a former oxide coating, the active resistance decreases. 16,17 Therefore, after the breakthrough of the initial oxide film, the voltage drop across the electrolyte becomes significant.…”

Section: B Voltage Drop Across the Electrolyte Between Two Electrodesmentioning

confidence: 99%

Low energy-consumption plasma electrolytic oxidation based on grid cathode

Zhang

Tian

Yang

et al. 2010

Review of Scientific Instruments

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Plasma electrolytic oxidation (PEO) has attracted widespread attention owing to the simplicity of operation and the excellent properties of the formed coating. However, wider applications of PEO have been limited due to the high power consumption. This work describes the design and performance of a novel technique named shorter distance PEO (SD-PEO), which is intended for lowering the energy consumption. The key feature of the method is the application of grid cathode to eliminate the gaseous envelope effect and to block of the exchange of charge carries during SD-PEO process. Compared to PEO carried out at a normal electrode distance, e.g., 50 mm, both the voltage drop and the joule heat consumed in the electrolyte at a shorter distance, e.g., of 5 mm (SD-PEO) are relatively small. Consequently, the energy consumption rendered by the novel SD-PEO method may decrease by more than 25%. Our results reveal that SD-PEO is a low energy-consumption microarc oxidation technique with more potential in industry applications.

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Cited by 5 publications

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Towards smart electrolytic plasma technologies: An overview of methodological approaches to process modelling

Towards smart electrolytic plasma technologies: An overview of methodological approaches to process modelling

Discharge characterization in plasma electrolytic oxidation of aluminium

Low energy-consumption plasma electrolytic oxidation based on grid cathode

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