The effect of glassfibre, graphite and MoS2 on the tribological performance of a liquid crystalline polymer
| Autor: | J.A. Kingma, P.R. Dufour, J.W.M. Mens, A.W.J. De Gee |
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| Rok vydání: | 1992 |
| Předmět: |
chemistry.chemical_classification
Bearing (mechanical) Materials science Surfaces and Interfaces Polymer Tribology Condensed Matter Physics Thermal diffusivity Critical value IR-32400 Thermotropic crystal Surfaces Coatings and Films law.invention chemistry Mechanics of Materials law Materials Chemistry Melting point METIS-144657 Graphite Composite material |
| Zdroj: | Wear, 1(156), 85-100. Elsevier |
| ISSN: | 0043-1648 |
| DOI: | 10.1016/0043-1648(92)90146-y |
| Popis: | A thermotropic liquid crystalline polymer (LCP) with a high melting point of approximately 400 °C, unfilled and filled with glassfibre, MoS 2 or graphitic carbon was tested in dry sliding contact with steel. Three different test methods were applied, i.e. measurement of coefficient of friction and specific wear rate vs. contact temperature; determination of load-carrying capacities at three different values of sliding speed, and friction and wear behaviour in 20 h tests under relatively severe conditions of load and sliding speed. It turned out that only glassfibre-containing materials perform adequately as dry-running bearing materials, provided that the contact temperature quickly rises above a critical value of the order of 125–140 °C. In load-carrying capacity tests and in 20 h tests under severe conditions, adding graphitic carbon to glassfibre-containing LCP is particularly beneficial, as this substantially increases the thermal diffusivity of the material. Thus it is concluded that glassfibre- and graphitic-carbon-containing LCP is perfectly suitable for use as a dry-running bearing material at elevated temperatures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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