STATIC AND DYNAMIC CHARACTERISTICS OF THE POLYMER COMPOSITES CONTAINING DISPERSED POLYTETRAFLUORETHYLENE
Journal Title: Tribologia - Year 2015, Vol 260, Issue 2
Abstract
The paper presents the results of static and dynamic friction force measurements for metal-polymer regeneration composites obtained in a reciprocating motion. The composite matrix was epoxy resin filled with iron powder, and a solid lubricant – polytetrafluoroethylene – tarflen obtained by suspension method. The composites with various quantitative contents of polytetrafluoroethylene (PTFE) 5, 10 and 15% were prepared. The composites were cross-linked at room temperature. The static and dynamic friction coefficient of composite-steel tribosystems was measured by means of a special test rig with a tribosystem adapted for sliding friction investigation under reciprocation motion. Using the elaborated methodology the stick-slip phenomena occurred in the investigated tribosystems was analysed. The measurements were performed under various unit pressures typical for the sliding guides in cutting machines (0.1, 0.5, 1.0, 1.5, 2.0 MPa). As a reference the static and dynamic characteristics of the steel – steel tribosystem was investigated. On the basis of obtained test results, it was concluded that polytetrafluoroethylene used as a friction modifier improves the tribological properties of the composite. The composite-steel tribosystem shows lower static friction coefficient and reduced stick-slip phenomena than conventional steel-steel tribosystem.
Authors and Affiliations
Zbigniew PAWELEC, Piotr KOWALEWSKI
Keywords
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