Natallia Shalkevich, Werner Escher, et al.
Langmuir
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.
Natallia Shalkevich, Werner Escher, et al.
Langmuir
Peter J. Price
Surface Science
C. Smart, S.K. Reynolds, et al.
MRS Proceedings 1992
J. Tersoff
Applied Surface Science