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Lubricant Spin-Off from Magnetic Recording Disks

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Abstract

As the rotation rate of magnetic recording disks increases over the next few years, lubricant spin-off from the disk surface may be significant. Lubricant thickness was measured as a function of spin time at 10 000 rpm on typical carbon overcoated magnetic recording disks initially lubricated with 10–135 Å of perfluoropolyether Zdol. The viscosity of the lubricant film increased as the film thickness decreased with spin time. Lubricant spin-off in response to air shear stress on the free surface was approximately described by viscous flow. The rate of lubricant removal by evaporation was compared to the spin-off removal rate in films between 10 and 50 Å thick. Dispersion interaction and chemisorption are expected to retain a molecularly thin film of lubricant on the disk surface.

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Authors and Affiliations

  1. IBM Research Division, Almaden Research Center, San Jose, CA, 95120, USA

    T.E. Karis, B. Marchon, V. Flores & M. Scarpulla

Authors
  1. T.E. Karis
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  2. B. Marchon
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  3. V. Flores
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  4. M. Scarpulla
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Karis, T., Marchon, B., Flores, V. et al. Lubricant Spin-Off from Magnetic Recording Disks. Tribology Letters 11, 151–159 (2001). https://doi.org/10.1023/A:1012553415639

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