Novel Ionic Lubricants for Magnetic Thin Film Media

New protic ionic liquids (PILs) have been developed. The kinetic friction coefficients of ammonium salts of the alcolate, the carboxylate, and the sulfonate were from 0.23, 0.17, and 0.15, respectively, and 0.26 for Fomblin Z-DOL. PILs have better friction and wear properties compared to Z-DOL. The...

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Veröffentlicht in:	IEEE transactions on magnetics 2013-07, Vol.49 (7), p.3756-3759
Hauptverfasser:	Kondo, Hirofumi, Ito, Makiya, Hatsuda, Koki, Yun, Kyungsung, Watanabe, Masayoshi
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Cross-disciplinary physics: materials science rheology Degradation Exact sciences and technology Friction heat-assisted magnetic recording lubricant Lubricants Magnetic liquids Magnetism Materials science Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Media Metals. Metallurgy Methods of deposition of films and coatings film growth and epitaxy Other topics in materials science Physics Surface treatment Thermal stability
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Beschreibung
Zusammenfassung:	New protic ionic liquids (PILs) have been developed. The kinetic friction coefficients of ammonium salts of the alcolate, the carboxylate, and the sulfonate were from 0.23, 0.17, and 0.15, respectively, and 0.26 for Fomblin Z-DOL. PILs have better friction and wear properties compared to Z-DOL. The ammonium salts as a hydrophilic group have a lower frictional coefficient, which enhanced the abrasion resistance. The friction and the thermal degradation decreases with the increasing between the Broensted acid and the Broensted amine. The material based on an ammonium sulfonate has higher , and does not decompose even at 300 , making it more thermally stable than Z-DOL.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/TMAG.2013.2244575