A model for lubricant flow from disk to slider

A model is presented that calculates the equilibrium lubricant thickness on a slider, resulting from a steady state where net inflow from disk evaporation equals net outflow from evaporation back to the disk, and flow to the slider back end from air shear. Based on experimental vapor pressure and vi...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2003-09, Vol.39 (5), p.2447-2449
Main Authors: Marchon, B., Karis, T., Qing Dai, Pit, R.
Format: Article
Language:English
Subjects:
Applied sciences
Disk drives
Electronics
Exact sciences and technology
Lubricants
Lubrication
Magnetic and optical mass memories
Magnetic flux
Magnetic heads
Magnetism
Other magnetic recording and storage devices (including tapes, disks, and drums)
Predictive models
Pressing
Steady-state
Storage and reproduction of information
Tribology
Viscosity
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Summary:A model is presented that calculates the equilibrium lubricant thickness on a slider, resulting from a steady state where net inflow from disk evaporation equals net outflow from evaporation back to the disk, and flow to the slider back end from air shear. Based on experimental vapor pressure and viscosity data, and using surface viscosity enhancement factor and disjoining pressure values available in the literature, this model predicts a transition from a flooded regime for molecular weight M/sub n/ below 1.5 kDaltons to a starved regime where slider lubricant thickness drops to a value close to zero. At the same time, lubricant accumulation to the slider back end is expected to decrease exponentially.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2003.816433