An experiment is conducted to investigate the role of surface roughness on the coefficient of friction and contact resistance of sliding electrical contacts. A hemispherical pin is sliding along both smooth and rough 2-meter rail surface. Tests are performed at both low and moderate sliding speed and for a range of electrical current densities, ranging from 0 to about 12 GA/m2. It was found that surface roughness had a significant influence on the coefficient of friction, with the smoother surfaces exhibiting higher coefficients of friction. Contact resistance, on the other hand, did not show as strong an effect of surface roughness, except for a few parameter combinations. At the higher current densities studied (>10 GA/m2), it was found that the contact resistance values tended to be on the order of 1 mΩ, independent of load, speed and roughness. This convergence may be due to presence of liquid metal film at the interface, which established ideal electrical contact.
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ASME/STLE 2007 International Joint Tribology Conference
October 22–24, 2007
San Diego, California, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4810-8
PROCEEDINGS PAPER
Influence of Surface Roughness on Friction and Contact Resistance in Sliding Electrical Contacts
Dinesh G. Bansal,
Dinesh G. Bansal
Georgia Institute of Technology, Atlanta, GA
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Jeffrey L. Streator
Jeffrey L. Streator
Georgia Institute of Technology, Atlanta, GA
Search for other works by this author on:
Dinesh G. Bansal
Georgia Institute of Technology, Atlanta, GA
Jeffrey L. Streator
Georgia Institute of Technology, Atlanta, GA
Paper No:
IJTC2007-44355, pp. 1057-1059; 3 pages
Published Online:
March 23, 2009
Citation
Bansal, DG, & Streator, JL. "Influence of Surface Roughness on Friction and Contact Resistance in Sliding Electrical Contacts." Proceedings of the ASME/STLE 2007 International Joint Tribology Conference. ASME/STLE 2007 International Joint Tribology Conference, Parts A and B. San Diego, California, USA. October 22–24, 2007. pp. 1057-1059. ASME. https://doi.org/10.1115/IJTC2007-44355
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