THERMAL, MECHANICAL, AND TRIBOLOGICAL PROPERTIES OF PTFE COMPOSITE WITH 20% GRAPHITE CONTENT IRRADIATED WITH AN ELECTRON BEAM
Journal Title: Tribologia - Year 2017, Vol 274, Issue 4
Abstract
The paper investigated the effect of irradiation with an electron beam of energy 10MeV in doses of 26-156 kGy on polytetrafluoroethylene with a 20% graphite additive. The tests have shown that changes in thermal properties of the composite (heat of crystallization, melting point and degree of crystallinity) directly affected mechanical properties and contributed to the significant improvement of tribological properties. Tribological tests were performed on a pin-on-disc (T-01) test stand and counter-specimens were made of 1H18N9T steel. The load applied in the friction pair was 1 and 2 MPa (20 and 40 N). A nearly fourfold reduction in linear wear compared to the initial state for a load of 1 MPa has been shown. On the other hand, a more than 20-fold decrease in wear was found during tribological tests when the load was increased to 2 MPa. The most advantageous results were obtained for specimens irradiated with a dose of 104 kGy; irradiation with a higher dose led to degradation of the polymer and caused its wear to increase again. The obtained results hold promise for a significant improvement of the operational life of friction couples which do not require lubrication, used for example in air compressors and engines, and for the possible application of thus modified polymers in nuclear and space industries.
Authors and Affiliations
Adrian BARYLSKI, Sławomir KAPTACZ, Władysław SKONECZNY, Marian KUPKA, Krzysztof ANIOŁEK
Keywords
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- EP ID EP238178
- DOI 10.5604/01.3001.0010.5980
- Views 67
- Downloads 0
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