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Complex fluids in tribology to reduce friction: Mesogenic fluids, ionic liquids and ionic liquid crystals

 
: Amann, T.; Dold, C.; Kailer, A.

:
Preprint urn:nbn:de:0011-n-2549426 (11 MByte PDF)
MD5 Fingerprint: 5b95165de9012c9c96516cdff0604240
Erstellt am: 23.5.2014


Tribology international 65 (2013), Special Issue "Great Challenges in Tribology", S.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
Englisch
Zeitschriftenaufsatz, Konferenzbeitrag, Elektronische Publikation
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.

: http://publica.fraunhofer.de/dokumente/N-254942.html