WTC2005_63550 - Proceedings of the: World Tribology...

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1 Copyright © #### by ASME Proceedings of the: World Tribology Congress III Washington Hilton, Washington DC WTC2005-63550 FRICTIONAL AND ELECTRICAL PROPERTIES OF MULTIWALLED CARBON NANOTUBES P. L. Dickrell Dept of Mechanical and Aerospace Engineering University of Florida Gainesville, FL 32611 N. R. Raravikar Dept. of Materials. Science and Engineering Rensselaer Polytechnic Institute Troy, NY 12180 S. K. Pal Dept. of Materials. Science and Engineering Rensselaer Polytechnic Institute Troy, NY 12180 L. S. Schadler Dept. of Materials. Science and Engineering Rensselaer Polytechnic Institute Troy, NY 12180 P. M. Ajayan Dept. of Materials. Science and Engineering Rensselaer Polytechnic Institute Troy, NY 12180 W. G. Sawyer Dept of Mechanical and Aerospace Engineering University of Florida Gainesville, FL 32611 ABSTRACT This presentation examines the tribological properties and contact resistance of oriented capped carbon multiwalled nanotube (MWNT) films. Highly anisotropic tribological behavior of MWNT films oriented in mutually orthogonal directions is observed. The average values of coefficient of friction varied from high values (μ=0.795) for vertically aligned nanotubes grown on rigid substrates to low values (μ=0.090) for the same nanotubes dispersed flat on the same substrates. The results were insensitive to humidity, which is in contrast to graphite materials. The multiwalled nanotube layers also had a monotonic decrease in friction coefficient with increased surface temperature in both orientations, having a
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This note was uploaded on 08/22/2011 for the course EGM 4313 taught by Professor Mei during the Spring '08 term at University of Florida.

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WTC2005_63550 - Proceedings of the: World Tribology...

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