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TECHNICAL PAPERS

Effects of Backbone and Endgroup on the Decomposition Mechanisms of PFPE Lubricants and Their Tribological Performance at the Head-Disk Interface

[+] Author and Article Information
Chao-Yuan Chen, David B. Bogy

Computer Mechanics Laboratory, Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720

C. Singh Bhatia

SSD/IBM, 5600 Cottle Road, San Jose, CA 95193

J. Tribol 123(2), 364-367 (May 25, 2000) (4 pages) doi:10.1115/1.1308018 History: Received January 11, 2000; Revised May 25, 2000
Copyright © 2001 by ASME
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References

Wei,  J., Fong,  W., Bogy,  D. B., and Bhatia,  C. S., 1998, “The Decomposition Mechanisms of a Perfluoropolyether at the Head/Disk Interface of Hard Disk Drives,” Tribol. Lett., 5, pp. 203–209.
Bhatia,  C. S., Fong,  W., Chen,  C.-Y., Wei,  J., Bogy,  D. B., Anders,  S., Stammler,  T., and Stohr,  J., 1999, “Tribo-Chemistry at the Head/Disk Interface,” IEEE Trans. Magn., 35, No. 2, pp. 910–915.
Chen, C.-Y., Fong, W., Bogy, D. B., and Bhatia, C. S., 1999, “The decomposition mechanisms and thermal stability of ZDOL lubricant on hydrogenated carbon overcoats,” ASME J. Tribol., April 2000 (to be published).
Chen,  C.-Y., Bogy,  D. B., and Bhatia,  C. S., 1999, “Tribochemistry of Monodispersed ZDOL with Hydrogenated Carbon Overcoats,” J. Vac. Soc. Technol., Jul/Aug, 18, No. 4, pp. 1809–1817.
Yun,  X. H., Bogy,  D. B., and Bhatia,  C. S., 1997, “Tribochemical Study of Hydrogenated Carbon Coatings with Different Hydrogen Content Levels in Ultra High Vacuum,” ASME J. Tribol., 119, pp. 437–443.
Sianesi,  D., Pasetti,  A., Fontanelli,  R., Bernardi,  G. C., and Caporiccio,  G., 1973, “Perfluoropolyethers by Photooxidation of Fluoroolefins,” La Chim. E. L’Industria, 55, pp. 208–221.
Ohsaka,  Y., 1985, “Recent Advances in Synthetic Lubricating Oils, 8 Perfluorinated Polyethers,” Petrotech (Tokyo), 8, pp. 840–843.
Kasai,  P. H., 1992, “Degradation of Perfluoropolyethers Catalyzed by Lewis Acids,” Adv. Info. Storage, Syst.4, pp. 291–314.
Li,  P., Lyth,  E., Munro,  D., and Ng,  L. M., 1998, “Adsorption and Reaction Mechanism of Perfluoroethers on Al2O3,TiO2, and SiO2 surfaces: Implications for Tribology,” Tribol. Lett., 4, pp. 109–118.
Kasai,  P. H., and Wheeler,  P., 1991, “Degradation of Perfluoropolyethers Catalyzed by Aluminum Chloride,” Appl. Surf. Sci., 52, pp. 91–106.
Kasai,  P. H., 1999, “Degradation of Perfluoropoly(ethers) and Role of X-1P Additives in Disk Files,” J. Info. Storage Proc. Syst.,1, pp. 23–31.
Waltman,  R. J., Tyndall,  G. W., Pacansky,  J., and Berry,  R. J., 1999, “Impact of Polymer Structure and Confinement on the Kinetics of ZDOL 4000 Bonding to Amorphous-Hydrogenated Carbon,” Tribol. Lett., 7, No. 2, pp. 91–102.
Chen, C.-Y., Bogy, D. B., and Bhatia, C. S., 2000, “Effect of Backbone on the Spreading Behavior of PFPE Lubricants and their Tribological Performance at the Head-Disk Interface,” J. Vac. Soc. Technol. (submitted).

Figures

Grahic Jump Location
Friction coefficient of UHV drag test on 12 Å ZDOL 4200 lubricated CHx disk
Grahic Jump Location
Friction coefficient of UHV drag test on 12 Å demnum SA 5500 lubricated CHx disk
Grahic Jump Location
Friction coefficient of UHV drag test on 12 Å AM 3001 lubricated CHx disk
Grahic Jump Location
Integrated degradation intensities of four major AM fragments during UHV drag tests on CHx disks lubricated with different lubricants
Grahic Jump Location
Wear durability of CHx disks lubricated with different lubricants during UHV drag tests
Grahic Jump Location
Weigt loss observed on PFPE’s when heated in contact with A12O3 (1 wt. %) at 200°C

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