wtc2005_63524 - Proceedings of the: World Tribology...

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1 Copyright © #### by ASME Proceedings of the: World Tribology Congress III Washington Hilton, Washington DC WTC2005-63524 TRIBOLOGICAL INVESTIGATION OF A LOW FRICTION, LOW WEAR POLYMER/POLYMER COMPOSITE David L. Burris Dept. of Mechanical and Aerospace Engineering University of Florida Gainesville FL 32611 W. Gregory Sawyer Dept. of Mechanical and Aerospace Engineering University of Florida Gainesville FL 32611 INTRODUCTION Wear resistant and low friction solid lubricants offer the design engineer attractive options for extreme environment lubrication, particularly in situations where the use of fluid lubricants are precluded. Past work with wear resistant PTFE nanocomposites made with sub 100nm particles of alumina showed that the nanoparticles decorate the PTFE surface during jet-milling process. Subsequent compression molding of these powders is believed to result in a compartmentalize PTFE composite. It is hypothesized that these reinforcing nanoparticles arrest crack propagation, although there is qualitative evidence that they weaken strength of the composite. The hypothesis for this investigation was to use small particles of PEEK as the filler, which can act to compartmentalize damage and form a structural filler network that would not require matrix/filler strength for mechanical integrity. The tribological properties of composite samples ranging from 0-100 weight percent PEEK filled PTFE were evaluated in this study. EXPERIMENTAL SETUP Hand mixed powders of appropriate proportions of approximately 3 µ m PEEK and 20 µ m PTFE were jet-milled and subsequently compression molded at 362˚C into 19 mm diameter x 25mm long cylinders. Samples measuring 6.4 mm x
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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_63524 - Proceedings of the: World Tribology...

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