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Characterisation of discharge events during plasma electrolytic oxidation

Characterisation of discharge events during plasma electrolytic oxidation
Characterisation of discharge events during plasma electrolytic oxidation
A study has been made of the electrical characteristics and optical emission spectra exhibited when discharge events take place during plasma electrolytic oxidation processing. Both conventional and small area experimental arrangements have been employed, allowing detailed measurement of durations, and temporal distributions, as well as such characteristics as charge transfer, and power. Individual discharges are of short duration, typically tens to hundreds of microseconds, but there is a strong endency for themto occur in cascades that commonly last between several ms and several tens of ms. The composition, temperature and electron density of the plasma formed during PEO processing are inferred from characteristics of the emission spectra. This confirms that there are two distinct regions of plasma; a lower density peripheral region at ~3500 K, and a higher density core at ~16,000±3500 K. The implications of these results are considered in terms of the interpretation of different types of experimental measurement, and attention is also briefly given to how such behaviour might relate to the mechanisms of growth.
Plasma electrolytic oxidation, Micro-arc oxidation, Spectral analysis, Electrical breakdown, Coatings
0257-8972
3410-3419
Dunleavy, C.S.
dd29fb19-d89a-4811-903f-89e530a37362
Golosnoy, I.O.
40603f91-7488-49ea-830f-24dd930573d1
Curran, J.A.
7d6d92c4-9bd2-4980-8ca8-d1053837ad92
Clyne, T.W.
00678bf7-17de-46e8-9b35-bf1ca73bce9b
Dunleavy, C.S.
dd29fb19-d89a-4811-903f-89e530a37362
Golosnoy, I.O.
40603f91-7488-49ea-830f-24dd930573d1
Curran, J.A.
7d6d92c4-9bd2-4980-8ca8-d1053837ad92
Clyne, T.W.
00678bf7-17de-46e8-9b35-bf1ca73bce9b

Dunleavy, C.S., Golosnoy, I.O., Curran, J.A. and Clyne, T.W. (2009) Characterisation of discharge events during plasma electrolytic oxidation. Surface and Coatings Technology, 203 (22), 3410-3419. (doi:10.1016/j.surfcoat.2009.05.004).

Record type: Article

Abstract

A study has been made of the electrical characteristics and optical emission spectra exhibited when discharge events take place during plasma electrolytic oxidation processing. Both conventional and small area experimental arrangements have been employed, allowing detailed measurement of durations, and temporal distributions, as well as such characteristics as charge transfer, and power. Individual discharges are of short duration, typically tens to hundreds of microseconds, but there is a strong endency for themto occur in cascades that commonly last between several ms and several tens of ms. The composition, temperature and electron density of the plasma formed during PEO processing are inferred from characteristics of the emission spectra. This confirms that there are two distinct regions of plasma; a lower density peripheral region at ~3500 K, and a higher density core at ~16,000±3500 K. The implications of these results are considered in terms of the interpretation of different types of experimental measurement, and attention is also briefly given to how such behaviour might relate to the mechanisms of growth.

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More information

Published date: 12 May 2009
Keywords: Plasma electrolytic oxidation, Micro-arc oxidation, Spectral analysis, Electrical breakdown, Coatings
Organisations: EEE

Identifiers

Local EPrints ID: 267632
URI: http://eprints.soton.ac.uk/id/eprint/267632
ISSN: 0257-8972
PURE UUID: dd9aff6f-e0fe-4ac6-aa08-0f560d5d8a3d

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Date deposited: 29 Jun 2009 13:55
Last modified: 25 Nov 2019 20:59

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