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Evaluating the influence of current on the wear processes of Au/Cr-Au/MWCNT switching surfaces

Evaluating the influence of current on the wear processes of Au/Cr-Au/MWCNT switching surfaces
Evaluating the influence of current on the wear processes of Au/Cr-Au/MWCNT switching surfaces
Wear processes of the switching contact pair consisting of a gold layer on multiwall carbon nanotubes (Au/MWCNT) and a chromium and gold coated hemispherical ball (Au/Cr) are evaluated over a range of current conditions. The switching experiments were conducted using typical conditions for a MEMS relay application, i.e. 4 V, with static contact force 1 mN with currents level of 20 - 200mA. The Au coated MWCNT substrate exhibited a transfer process over a large number of switching cycles. On the assumption that the transfer process was a combination of a fine transfer and delamination processes; a previous experimental investigation was considered by dividing the wear processes into four stages of a failure behavior. It is observed that the fine transfer process dominates in the unstable and stable contact resistance stage and then the delamination dominates in the rising stage and a failure process. The increase of contact resistance was used to identify contact failure.
carbon nanotubes, stable stage, mems switching surface, fine transfer mechanism and contact resistance
344-349
Chianrabutra, Chamaporn
f09c1da6-370e-43ac-b9bb-5283633ebadb
Jiang, Liudi
374f2414-51f0-418f-a316-e7db0d6dc4d1
Lewis, Adam
92717168-ccc3-4540-8150-6e42198ae454
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Chianrabutra, Chamaporn
f09c1da6-370e-43ac-b9bb-5283633ebadb
Jiang, Liudi
374f2414-51f0-418f-a316-e7db0d6dc4d1
Lewis, Adam
92717168-ccc3-4540-8150-6e42198ae454
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770

Chianrabutra, Chamaporn, Jiang, Liudi, Lewis, Adam and McBride, J.W. (2013) Evaluating the influence of current on the wear processes of Au/Cr-Au/MWCNT switching surfaces. 59th IEEE Holm Conference on Electrical Contacts, United States. 22 - 25 Sep 2013. pp. 344-349 .

Record type: Conference or Workshop Item (Paper)

Abstract

Wear processes of the switching contact pair consisting of a gold layer on multiwall carbon nanotubes (Au/MWCNT) and a chromium and gold coated hemispherical ball (Au/Cr) are evaluated over a range of current conditions. The switching experiments were conducted using typical conditions for a MEMS relay application, i.e. 4 V, with static contact force 1 mN with currents level of 20 - 200mA. The Au coated MWCNT substrate exhibited a transfer process over a large number of switching cycles. On the assumption that the transfer process was a combination of a fine transfer and delamination processes; a previous experimental investigation was considered by dividing the wear processes into four stages of a failure behavior. It is observed that the fine transfer process dominates in the unstable and stable contact resistance stage and then the delamination dominates in the rising stage and a failure process. The increase of contact resistance was used to identify contact failure.

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More information

e-pub ahead of print date: 22 September 2013
Venue - Dates: 59th IEEE Holm Conference on Electrical Contacts, United States, 2013-09-22 - 2013-09-25
Keywords: carbon nanotubes, stable stage, mems switching surface, fine transfer mechanism and contact resistance
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 358471
URI: https://eprints.soton.ac.uk/id/eprint/358471
PURE UUID: 9f0f03de-bda8-4f98-a2b2-975c8443034c
ORCID for Liudi Jiang: ORCID iD orcid.org/0000-0002-3400-825X

Catalogue record

Date deposited: 09 Oct 2013 09:45
Last modified: 06 Jun 2018 12:41

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Contributors

Author: Chamaporn Chianrabutra
Author: Liudi Jiang ORCID iD
Author: Adam Lewis
Author: J.W. McBride

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