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Laser ablation of silicone composites

Laser ablation of silicone composites
Laser ablation of silicone composites
Silicone rubber based composites are used widely for outdoor high voltage components such as bushings, cable strings and as weather resistant coatings. In adverse weather conditions, dry band discharges [1] can occur resulting in tracking and surface damage; this can ultimately result in dielectric or mechanical failure. Traditionally these components are filled with aluminium trihydrate (ATH) and other fillers, such as silica, to improve their tracking resistance and erosion performance [2]. It is important in designing such materials that good arc resistant composites are chosen in order to maximise lifetime and minimise downtime and maintenance costs. Inclined plane tracking tests [2] have proved useful in determining the relative resistance of different material formulations to surface damage and have indicated that materials having a high filler loading are beneficial up to the point where a good dispersion of the filler can be maintained. An alternative test method is to use a high power laser to apply a known amount of energy at a known power to a localised region of the sample. Recently, this technique has been successfully applied to the characterisation of several outdoor insulation materials [3], however in these experiments we have sought to compare different materials rather than a fixed material having different filler contents. In the current investigation we consider the role of the filler content on the ablation resistance of several silicone rubber based composites, a range of laser powers and energies were employed and the resulting surface damage was quantified by pit-depth and mass loss measurements supplemented by optical microscopy. The extent of ablation was correlated to the filler content and composition and pointers to improved materials provided.
Hosier, I. L.
6a44329e-b742-44de-afa7-073f80a78e26
Abd Rahman, M. S.
8217f865-63cf-4fa4-9f2b-19589bbdb2f0
Vaughan, A. S.
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Krivda, A.
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Kommann, X
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Schmidt, L E
654c4336-d089-4f9e-bda1-97676d28fe7e
Hosier, I. L.
6a44329e-b742-44de-afa7-073f80a78e26
Abd Rahman, M. S.
8217f865-63cf-4fa4-9f2b-19589bbdb2f0
Vaughan, A. S.
6d813b66-17f9-4864-9763-25a6d659d8a3
Krivda, A.
9b12a308-ea80-4691-b8da-66b6359a059c
Kommann, X
e3e92da1-ec36-4d10-9f80-e8005bd1538f
Schmidt, L E
654c4336-d089-4f9e-bda1-97676d28fe7e

Hosier, I. L., Abd Rahman, M. S., Vaughan, A. S., Krivda, A., Kommann, X and Schmidt, L E (2011) Laser ablation of silicone composites. Dielectrics 2011, United Kingdom. 13 - 15 Apr 2011.

Record type: Conference or Workshop Item (Paper)

Abstract

Silicone rubber based composites are used widely for outdoor high voltage components such as bushings, cable strings and as weather resistant coatings. In adverse weather conditions, dry band discharges [1] can occur resulting in tracking and surface damage; this can ultimately result in dielectric or mechanical failure. Traditionally these components are filled with aluminium trihydrate (ATH) and other fillers, such as silica, to improve their tracking resistance and erosion performance [2]. It is important in designing such materials that good arc resistant composites are chosen in order to maximise lifetime and minimise downtime and maintenance costs. Inclined plane tracking tests [2] have proved useful in determining the relative resistance of different material formulations to surface damage and have indicated that materials having a high filler loading are beneficial up to the point where a good dispersion of the filler can be maintained. An alternative test method is to use a high power laser to apply a known amount of energy at a known power to a localised region of the sample. Recently, this technique has been successfully applied to the characterisation of several outdoor insulation materials [3], however in these experiments we have sought to compare different materials rather than a fixed material having different filler contents. In the current investigation we consider the role of the filler content on the ablation resistance of several silicone rubber based composites, a range of laser powers and energies were employed and the resulting surface damage was quantified by pit-depth and mass loss measurements supplemented by optical microscopy. The extent of ablation was correlated to the filler content and composition and pointers to improved materials provided.

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D2011Ian.ppt - Other
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More information

Published date: 13 April 2011
Additional Information: Event Dates: 13 - 15 April 2011
Venue - Dates: Dielectrics 2011, United Kingdom, 2011-04-13 - 2011-04-15
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 272200
URI: http://eprints.soton.ac.uk/id/eprint/272200
PURE UUID: 5f530150-e92d-4d7c-a823-ed7ac1e7805f
ORCID for I. L. Hosier: ORCID iD orcid.org/0000-0003-4365-9385
ORCID for A. S. Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

Catalogue record

Date deposited: 16 Apr 2011 11:02
Last modified: 09 May 2019 00:36

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Contributors

Author: I. L. Hosier ORCID iD
Author: M. S. Abd Rahman
Author: A. S. Vaughan ORCID iD
Author: A. Krivda
Author: X Kommann
Author: L E Schmidt

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