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Friction tests have been carried out on bearing steel friction pairs coated with a-C:H and ta-C under lubricated conditions with 1-hexadecene and pure oleic acid, respectively. Main results show that ta-C leads to the super-low regime with oleic acid (friction coefficient below 0.01) and that a-C:H is quite well lubricated by 1-hexadecen. Surface analyses by coupling X-ray photoelectron spectroscopy (XPS) and secondary ion mass spectrometry (SIMS) have been carried out in the case of oleic acid with ta-C and a-C:H coatings. Results show that tribochemical reactions have occurred. OH groups terminate the ta-C surface whereas a-C:H is covered by a thin tribofilm and is terminated by oleic acid monolayers. The superlow regime in the case of ta-C is mainly attributed to the presence of the OH-termination.


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Super-low friction of ta-C coating in presence of oleic acid

Show Author's information Makoto KANO1Jean Michel MARTIN2( )Kentaro YOSHIDA1Maria Isabel DE BARROS BOUCHET2
Division of Mechanical & Material Engineering, Kanagawa Industrial Technology Center 705-1 Shimo-Imaizumi, Ebina, Kanagawa, Japan
LTDS, Ecole Centrale de Lyon 69380, Ecully, France

Abstract

Friction tests have been carried out on bearing steel friction pairs coated with a-C:H and ta-C under lubricated conditions with 1-hexadecene and pure oleic acid, respectively. Main results show that ta-C leads to the super-low regime with oleic acid (friction coefficient below 0.01) and that a-C:H is quite well lubricated by 1-hexadecen. Surface analyses by coupling X-ray photoelectron spectroscopy (XPS) and secondary ion mass spectrometry (SIMS) have been carried out in the case of oleic acid with ta-C and a-C:H coatings. Results show that tribochemical reactions have occurred. OH groups terminate the ta-C surface whereas a-C:H is covered by a thin tribofilm and is terminated by oleic acid monolayers. The superlow regime in the case of ta-C is mainly attributed to the presence of the OH-termination.

Keywords: friction, wear, epoxy composite, short carbon fiber

References(10)

[1]
Y Mabuchi, T Hamada, H Izumi, Y Yasuda, M Kano. The development of hydrogen-free DLC-coated valve-lifter. SAE Paper 2007-01-1752 (2007)
[2]
S Okuda, T Dewa, T Sagawa. Development of 5W-30 GF-4 fuel-saving engine oil for DLC-coated valve lifters. SAE Paper 2007-01-1979 (2007)
[3]
Y Yasuda, M Kano, Y Mabuchi, S Abou. Research on diamond-like carbon coatings for low-friction valve lifters. SAE Paper 2003-01-1101 (2003)
[4]
M Kano, Y Yasuda, Y Mabuchi, J Ye, S Konishi. Ultra-low friction properties of DLC lubricated with ester-containing oil—Part1: Pin-on-disc and SRV friction tests. In 30th Leeds-Lyon Symposium Proceedings, Lyon, France, 2003: 689−692.
DOI
[5]
M Kano, Y Yasuda, Y Okamoto, Y Mabuchi, T Hanada, T Ueno, J Ye, S Konishi, S Takeshima, J M Martin, et al. Ultralow friction of DLC in presence of glycerol mono-oleate (GNO). Tribol Lett 18(2): 245−251 (2005)
[6]
C Matta, L Joly-Pottuz, M I De Barros Bouchet, J M Martin, M Kano, Q Zhang, III W A Goddard. Superlubricity and tribochemistry of polyhydric alcohols. Phys Rev B 78: 085436 (2008)
[7]
M Kano, K Yoshida. Ultra low friction of DLC coating with lubricant. J Phys: Conf Ser 258: 012009 (2010)
[8]
H Takigawa, K Izumi, R Miyamoto, T Sakakibara. DLC thin film preparation by cathodic arc deposition with a super droplet-free system. Surf Coat Tech 163−164: 368−373 (2003)
[9]
L Joly-Pottuz, C Matta, M I De Barros Bouchet, B Vacher, J M Martin, T Sagawa. Superlow friction of ta-C lubricated by glycerol: An electron energy loss spectroscopy study. J Appl Phys 102: 064912 (2007)
[10]
M I De Barros-Bouchet, G Zilibotti, C Matta, M C Righi, L Vandenbulcke, B Vacher, J M Martin. Lubrication of diamond by water vapor and hydrogen. Coupling gas phase tribometry and computer works, J Phys Chem C 116(12): 6966-6972 (2012)
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Publication history

Received: 12 December 2013
Revised: 15 March 2014
Accepted: 27 March 2014
Published: 05 May 2014
Issue date: June 2014

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© The author(s) 2014

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