Tribology Letters

, Volume 54, Issue 3, pp 279–286 | Cite as

Investigation of Head/Disk Contacts in Helium–Air Gas Mixtures

  • Zhengqiang Tang
  • Pablo A. Salas Mendez
  • Frank E. Talke
Original Paper

Abstract

The shock response of a pico-type magnetic recording slider in different helium–air gas mixtures is investigated numerically. A finite element-based air bearing simulator and a slider/disk contact model including van der Waals and friction forces are coupled to determine the contact characteristics between slider and disk. The minimum flying height and the maximum contact force are studied as a function of helium percentage and disk velocity. The results show that the dynamic performance of the slider is not affected substantially as long as the helium percentage is <50 % but is increasingly more affected if the helium percentage becomes larger than 50 %.

Keywords

Slider/disk contact Helium–air Dynamic flying height Air bearing 

References

  1. 1.
    Bouchard, G., Talke, F.E.: Non-repeatable flutter of magnetic recording disks. IEEE Trans. Magn. 22, 1019–1021 (1986)CrossRefGoogle Scholar
  2. 2.
    Sato, I., Otani, K., Oguchi, S., Hoshiya, K.: Characteristics of heat transfer in a helium-filled disk enclosure. IEEE Trans. Adv. Packag. 11, 571–575 (1988)Google Scholar
  3. 3.
    Aruga, K., Suwa, M., Shimizu, K., Watanabe, T.: A study on positioning error caused by flow induced vibration using helium-filled hard disk drives. IEEE Trans. Magn. 43, 3750–3755 (2007)CrossRefGoogle Scholar
  4. 4.
    Yang, J., Tan, C.P.H., Ong, E.H.: Thermal analysis of helium-filled enterprise disk drive. Microsyst. Technol. 16, 1699–1704 (2010)CrossRefGoogle Scholar
  5. 5.
    Park, K.S., Park, Y.P., Park, N.C.: Prospect of recording technology for higher storage performance. IEEE Trans. Magn. 47, 539–545 (2011)CrossRefGoogle Scholar
  6. 6.
    Park, K.S., Choi, J., Park, N.C., Park, Y.P.: Effect of temperature and helium ratio for performance of thermal flying control in air–helium gas mixture. Microsyst. Technol. 19, 1679–1684 (2013)CrossRefGoogle Scholar
  7. 7.
    Ananth, R.S., Fick, A.L., Morris, F.I.: Method of manufacturing a hermetically sealed disk drive. US Patent No. 1995/5454157 (1995)Google Scholar
  8. 8.
    Kouno, T., Aoyagi, A., Ichikawa, K., Nakamiya, T.: Manufacturing method of hermetic connection terminal used in a disk drive device having hermetically sealed enclosure and disk drive device. US Patent No. 2009/0168233 A1 (2009)Google Scholar
  9. 9.
    Gustafson, J.R., Jacoby, J.E.: Sealed laminated electrical connector for helium filled disk drive. US Patent No. 2011/0211279 A1 (2011)Google Scholar
  10. 10.
    Liu, N., Zheng, J., Bogy, D.B.: Thermal flying-height control sliders in hard disk drives filled with air–helium gas mixtures. Appl. Phys. Lett. 95, 213505 (2009)CrossRefGoogle Scholar
  11. 11.
    Liu, N., Zheng, J., Bogy, D.B.: Thermal flying-height control sliders in air–helium gas mixtures. IEEE Trans. Magn. 47, 100–104 (2011)CrossRefGoogle Scholar
  12. 12.
    Salas, P.A., Talke, F.E.: Numerical simulation of thermal flying-height control sliders to dynamically minimize flying height variations. IEEE Trans. Magn. 49, 1337–1342 (2013)CrossRefGoogle Scholar
  13. 13.
    Xu, J.: Head/disk interface tribology in the nanometer regime. Dissertation, University of California, San Diego (2008)Google Scholar
  14. 14.
    Kogut, L., Etsion, I.: A static friction model for elastic-plastic contacting rough surfaces. ASME J. Tribol. 126, 34–40 (2004)CrossRefGoogle Scholar
  15. 15.
    Suh, A.Y., Polycarpou, A.A.: Adhesive contact modeling for sub-5-nm ultralow flying magnetic storage head-disk interfaces including roughness effects. J. Appl. Phys. 97, 104328–104338 (2008)CrossRefGoogle Scholar
  16. 16.
    Chang, W.R., Etsion, I., Bogy, D.B.: Static friction coefficient model for metallic rough surfaces. ASME J. Tribol. 110, 57–63 (1988)CrossRefGoogle Scholar
  17. 17.
    Bird, G.A.: Molecular Gas Dynamics and the Direct Simulation of Gas Flows. Oxford University Press, New York (1994)Google Scholar
  18. 18.
    Poling, B.E., Prausnitz, J.M., O’Connell, J.P.: The Properties of Gases and Liquids, 5th edn. McGraw-Hill, New York (2001)Google Scholar
  19. 19.
    Liu, N., Bogy, D.B.: Temperature effect on a HDD slider’s flying performance. Tribol. Lett. 35, 105–112 (2009)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Zhengqiang Tang
    • 1
    • 3
  • Pablo A. Salas Mendez
    • 2
  • Frank E. Talke
    • 3
  1. 1.South China University of TechnologyGuangzhouPeople’s Republic of China
  2. 2.Western Digital CorporationSan JoseUSA
  3. 3.Center for Magnetic Recording ResearchUniversity of California, San DiegoLa JollaUSA

Personalised recommendations