Extreme operating conditions, as encountered in the sliding armature-rail interface in electromagnetic launchers, require novel lubrication schemes. Low melting-point metals may be effective in concurrently lowering the armature-rail electrical resistance and friction. Bismuth-coated armatures reduce rail wear while improving the efficiency over multiple launches. These metals may serve as liquid lubricants for other high-power sliding electrical contact applications.
- Tribology Division
Bismuth Lubrication of Rail-Armature Interface
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Hsieh, P, Ghosh, G, Fine, ME, Chung, Y, Wang, J, & Crawford, M. "Bismuth Lubrication of Rail-Armature Interface." 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. 1045-1046. ASME. https://doi.org/10.1115/IJTC2007-44300
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