Phosphonium ionic liquids as lubricants for aluminium-steel
Contribuinte(s) |
Hadfield, M. Seabra, J. Brebbia, C. A. |
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Data(s) |
01/01/2010
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Resumo |
The performance of a series of novel room temperature ionic liquids (ILs) based on the trihexyl(tetradecyl)phosphoniumcation (P66614 +) and a number of novel anions have been studied in pin-on-disk tests using a 100Cr6 steel ball on AA2024 aluminium disks.<br /><br />The anions coupled to the (P66614 +) cation include diphenyl phosphate (DPP-), dibutyl phosphate (DBP-), bis (2,4,4-trimethyl pentyl) phosphinate (M3PPh-) and bis(2-ethyl hexyl) phosphate (BEH-).<br /><br />More traditional anions such as bis(trifluoromethanesulfonyl) amide (NTf2 -) and bromide (Br-) were also investigated. Experiments were conducted at various loads to assess the IL film forming abilities.<br /><br />The results suggest that the structure of the anion is important in forming a surface film that reduces the friction and wear of the aluminium disk. At 30N five of the six ILs tested showed a 30-90% reduction in wear, as determined from wear scar depth measurements, compared to fully formulated diesel oil.<br /><br />The IL lubricant with a diphenyl phosphate anion achieved the lowest wear coefficient, showing a better performance than a typical fluorine-containing IL anion, NTf2.<br /><br />To further investigate wear mechanisms and surface interactions the wear scars were analysed using a scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). <br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
WIT |
Relação |
http://dro.deakin.edu.au/eserv/DU:30031052/howlett-phosphoniumionicliquids-2010.pdf http://dx.doi.org/10.2495/TD100231 |
Direitos |
2010, WIT |
Palavras-Chave | #ionic liquids #phosphonium #phosphorus anions #phenyl rings #lubricants #tribology #wear test #SEM #EDS |
Tipo |
Conference Paper |