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A finite element based electrical resistance study of rough surfaces: applied to a bi-layered Au/MWCNT composite for micro-switching applications

A finite element based electrical resistance study of rough surfaces: applied to a bi-layered Au/MWCNT composite for micro-switching applications
A finite element based electrical resistance study of rough surfaces: applied to a bi-layered Au/MWCNT composite for micro-switching applications
A gold coated multi-walled carbon nanotube (Au/MWCNT) composite has been used as a surface material in electrical contacts to improve the lifetime of micro-switches. A modified nano-indentation setup, with a 2 mm-diameter gold coated stainless steel probe making contact with the Au/MWCNT composite, has been used to investigate the electrical behavior of the composite. The contact forces are ranged from 0.2 mN to 2 mN. A finite element (FE) contact model is developed, linked to the nano-indentation tests. The composite is modeled as a bi-layered structure, and surface roughness is included in the modeling. The contact area is calculated from the modeling. The effective resistivity for the surface is used to determine the contact resistance, using the Holm equation. The calculated force-resistances are based on a number of assumptions and show the same trend as the experimental results.
2158-9992
65-71
IEEE
Liu, Hong
e8808574-7eb8-459e-9539-110a1f76e117
McBride, John
d9429c29-9361-4747-9ba3-376297cb8770
Liu, Hong
e8808574-7eb8-459e-9539-110a1f76e117
McBride, John
d9429c29-9361-4747-9ba3-376297cb8770

Liu, Hong and McBride, John (2016) A finite element based electrical resistance study of rough surfaces: applied to a bi-layered Au/MWCNT composite for micro-switching applications. In 2016 IEEE 62nd Holm Conference on Electrical Contacts (Holm). IEEE. pp. 65-71 . (doi:10.1109/HOLM.2016.7780009).

Record type: Conference or Workshop Item (Paper)

Abstract

A gold coated multi-walled carbon nanotube (Au/MWCNT) composite has been used as a surface material in electrical contacts to improve the lifetime of micro-switches. A modified nano-indentation setup, with a 2 mm-diameter gold coated stainless steel probe making contact with the Au/MWCNT composite, has been used to investigate the electrical behavior of the composite. The contact forces are ranged from 0.2 mN to 2 mN. A finite element (FE) contact model is developed, linked to the nano-indentation tests. The composite is modeled as a bi-layered structure, and surface roughness is included in the modeling. The contact area is calculated from the modeling. The effective resistivity for the surface is used to determine the contact resistance, using the Holm equation. The calculated force-resistances are based on a number of assumptions and show the same trend as the experimental results.

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More information

e-pub ahead of print date: October 2016
Published date: 12 December 2016
Venue - Dates: 2016 IEEE 62nd Holm Conference on Electrical Contacts (Holm), Clearwater Beach, United States, 2016-10-09 - 2016-10-12
Organisations: Mechatronics

Identifiers

Local EPrints ID: 402402
URI: http://eprints.soton.ac.uk/id/eprint/402402
ISSN: 2158-9992
PURE UUID: 604468bb-8358-475f-8758-4d4bc1d2f6ea

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Date deposited: 08 Nov 2016 14:25
Last modified: 21 Oct 2019 16:30

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Contributors

Author: Hong Liu
Author: John McBride

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