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Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten. Complex fluids in tribology to reduce friction: Mesogenic fluids, ionic liquids and ionic liquid crystals
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Preprint urn:nbn:de:0011-n-2549426 (11 MByte PDF) MD5 Fingerprint: 5b95165de9012c9c96516cdff0604240 Created on: 23.5.2014 |
| Tribology international 65 (2013), Special Issue "Great Challenges in Tribology", pp.3-12 ISSN: 0301-679X |
| Leeds-Lyon Symposium on Tribology <39, 2012, Leeds> |
| Deutsche Forschungsgemeinschaft DFG SPP 1191; KA2745/3-1 |
| Deutsche Forschungsgemeinschaft DFG SPP 1191; KA2745/2-1 |
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| English |
| Journal Article, Conference Paper, Electronic Publication |
| Fraunhofer IWM () |
| mesogenic fluids; ionic liquids; ionic liquid crystals; wear analysis; in-lubro infrared spectroscopy; friction mechanisms |
Abstract
The tribological behavior of complex fluids was investigated to study the mechanisms, which cause low friction values. Therefore reciprocating sliding tests using two different geometries (cylinder-on-disc, ring-on-disc) were performed. Afterwards the characteristics of the wear scars were analyzed. In addition, in-lubro infrared analysis executed to assign the relative change of the content of water during a tribological test. The mesogenic fluid MF-02/06 (µ about 0.005), imidazolium-based ionic liquids (µ about 0.02) and ionic liquid crystals (µ about 0.01) showed low friction coefficients after a specific running-in time using cylinder-on-disc geometry. The wear scars showed a characteristic grooved structure for the fluids with the lowest friction coefficients. Using in-lubro IR-spectroscopy, it was detected that the water content decreases during the tribological test, which influences the corrosive behavior.