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Effect of Intermolecular Forces on the Dynamic Response of a Slider

[+] Author Affiliations
Saurabh K. Deoras, Frank E. Talke

University of California at San Diego, San Diego, CA

Paper No. WTC2005-63679, pp. 733-734; 2 pages
doi:10.1115/WTC2005-63679
From:
  • World Tribology Congress III
  • World Tribology Congress III, Volume 1
  • Washington, D.C., USA, September 12–16, 2005
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4201-0 | eISBN: 0-7918-3767-X
  • Copyright © 2005 by ASME

abstract

As the spacing between the slider and the disk approaches atomic distances, near range intermolecular forces start to act at the slider-disk interface. Wu and Bogy have numerically predicted that intermolecular forces become of importance when the slider-disk spacing is lower than 5nm [1]. Thornton and Bogy have proposed that it may not be possible for a slider to fly at a very low flying height without “snapping” and without having slider disk contacts [2; 3]. According to their calculations, a slider would “snap” (get pulled very close) to the disk surface, as a result of attractive intermolecular forces, when the flying height is lowered below a certain “critical” flying height. However, the question arises whether a slider is likely to “snap” at flying heights greater than the “critical” flying height due to its dynamic response.

Copyright © 2005 by ASME

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