%0 Journal Article %1 Jimenez06 %A Jiménez, Ana-Eva %A Bermúdez, María-Dolores %D 2006 %J Tribology Letters %K Aluminium and friction ionic liquid lubricant steel wear %N 1 %P 53-60 %T Ionic liquids as lubricants for steel-aluminium contacts at low and elevated tempreatures %V 26 %X Room temperature ionic liquids (ILs) are high performance fluids with a wide thermal stability range. In this work we present the first study of ILs as lubricants under a wide range of temperature conditions ($-30, 100 and 200^/circC). The tribological performance of the imidazolim ionic liquids 1-hexyl,3-methyl (L106) and 1-octyl,3-methyl (L108)imidazolium tetrafluoborates have been compared with that of a mineral oil (MO) an dthe synthetic ester propylene glycol dioleate (PGDO) in pin-on-disk aluminum-steel contacts.ILS show lower friction an wear values than conventional oils at all tempreatures. The lubricating performance depends on thermal stability, polarity of the molecues, their ability to form ordered absorbed layers and the tribocorrosion processen, which take place at the interface. While the conventional oils MO and PGDO fail above 150$^/circC$ due to thermal decomposition, the longer alkyl chain L108 provides an effective surface seperation at all tempreatures. L108 only shows friction an wear increments at $-30^/circC$ in the pressence of water, due to severe abrasion. While the more polar, shorter alkyl chain L106 shows severe wear at $200^/circC$ due to aluminum flouride wear debis formation by tribocorrosion reaction. The time for tribocorrosion to take place has been determined from friction increments and wear debris generation. Weat mechanisms are discussed on the basis of SEM, EDS and XPS results.

@article{Jimenez06, abstract = {Room temperature ionic liquids (ILs) are high performance fluids with a wide thermal stability range. In this work we present the first study of ILs as lubricants under a wide range of temperature conditions ($-30, 100 and 200^{/circ}C). The tribological performance of the imidazolim ionic liquids 1-hexyl,3-methyl (L106) and 1-octyl,3-methyl (L108)imidazolium tetrafluoborates have been compared with that of a mineral oil (MO) an dthe synthetic ester propylene glycol dioleate (PGDO) in pin-on-disk aluminum-steel contacts.ILS show lower friction an wear values than conventional oils at all tempreatures. The lubricating performance depends on thermal stability, polarity of the molecues, their ability to form ordered absorbed layers and the tribocorrosion processen, which take place at the interface. While the conventional oils MO and PGDO fail above 150$^{/circ}C$ due to thermal decomposition, the longer alkyl chain L108 provides an effective surface seperation at all tempreatures. L108 only shows friction an wear increments at $-30^{/circ}C$ in the pressence of water, due to severe abrasion. While the more polar, shorter alkyl chain L106 shows severe wear at $200^{/circ}C$ due to aluminum flouride wear debis formation by tribocorrosion reaction. The time for tribocorrosion to take place has been determined from friction increments and wear debris generation. Weat mechanisms are discussed on the basis of SEM, EDS and XPS results.}, added-at = {2008-08-18T13:22:13.000+0200}, author = {Jiménez, Ana-Eva and Bermúdez, María-Dolores}, biburl = {https://www.bibsonomy.org/bibtex/23d27002270f0db91cef14a1c0604f219/ramunno}, interhash = {96f105e7a208e8dc0d410ce1286cef0f}, intrahash = {3d27002270f0db91cef14a1c0604f219}, journal = {Tribology Letters}, keywords = {Aluminium and friction ionic liquid lubricant steel wear}, month = {april}, number = 1, pages = {53-60}, timestamp = {2008-08-18T13:22:13.000+0200}, title = {Ionic liquids as lubricants for steel-aluminium contacts at low and elevated tempreatures}, volume = 26, year = 2006 }