Abstract
Mass spectrometry was used to monitor in-situ gaseous species that were generated at the head-disk interface (HDI) in a high vacuum. It was found that the end groups of the lubricants significantly affected the wear durability at the HDI; piperonyl (–CH2-phe = (O)2 = CH2) terminated Fomblin AM3001 lubricant exhibited longer life than hydroxyl (–OH) terminated Fomblin ZDOL lubricant. The continuous removal of the lubricants resulted in a continuously increasing friction coefficient. Further, the characteristics of tribochemical reactions of the lubricants (Fomblin Z series) with different end groups was investigated in details using Time-of-Flight Secondary Ion Mass Spectroscopy (TOF-SIMS) just after the sliding tests. It was found that the decomposition of the end groups was more significant than that of the backbone. The lubricants terminated with the following groups showed the following order of increasing decomposition: –CH2O-CH2-phe = (O)2 = CH2 (AM3001), –CH2OH (ZDOL) < –CH2OCH2CH(OH)CH2OH (Z Tetraol) < –CH2(OCH2CH2)nOH (ZDOL-TX), –COOH (Z Diac). The decomposition of the lubricants appeared to start from the end groups.
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References
B. Bhushan and Z. Zhao, J. Info. Storage Proc. Syst. 1 (1999) 1.
G.H. Vurens and C.M. Mate, Appl. Surf. Sci. 59 (1992) 281.
Z. Zhao and B. Bhushan, Wear 202 (1996) 50.
B. Bhushan and Z. Zhao, IEEE Trans. Magn. 33 (1997) 918.
B.G. Min, J.W. Choi, H.R. Brown, D.Y. Yoon, T.M. O'Connor and M.S. Jhon, Tribol. Lett. 1 (1995) 225.
X. Ma, J. Gui, K.J. Grannen, L.A. Smoliar, B. Marchon, M.S. Jhon and C.L. Bauer, Tribol. Lett. 6 (1999) 9.
S. Mori, N. Onodera and M. Itoh, Wear 68 (1993) 85.
V.J. Novotny, X. Pan and C.S. Bhatia, J. Vac. Sci. Technol. A12 (1994) 2879.
J. Wei, W. Fong, D.B. Bogy and C.S. Bhatia, Tribol. Lett. 5 (1998) 203.
T. Numata, H. Onodera, Y. Miyake and S. Mori, Tribologist (J.Japan Tribol. Soc.) 44 (1999) 374.
C.Y. Chen, W. Fong, D.B. Bogy and C.S. Bhatia, Tribol. Lett. 7 (1999) 1.
T.M. O'Connor, M.S. Jhon, C.L. Bauer, B.G. Min, D.Y. Yoon and T.E. Karis, Tribol. Lett. 1 (1995) 219.
X. Ma, J. Gui, L. Smoliar, K. Grannen, B. Marchon, M.S. Jhon and C.L. Bauer, J. Chem. Phys. 110 (1999) 3129.
M. Yanagisawa, Tribol. and Mechanics of Mag. Storage Syst. IX, STLE Special Pub. SP-36 (1994) 25.
T. Yamamoto, M. Takahashi and M. Shinohara, STLE Special Pub., SP-29 (1990) 91.
R. Koka and F. Armatis, Tribol. Trans. 40 (1997) 63.
P.H. Kasai, W.T. Tang and P. Wheeler, Appl. Surf. Sci. 51 (1991) 201.
P.H. Kasai, Macromolecules, 25 (1992) 6791.
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Mori, S., Cong, P., Nanao, H. et al. Effects of End Groups on the Tribochemical Reactions of Lubricants at Head-Disk Interface. Tribology Letters 17, 317–325 (2004). https://doi.org/10.1023/B:TRIL.0000032470.61259.61
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DOI: https://doi.org/10.1023/B:TRIL.0000032470.61259.61