Title :
Observation of PFPE lubricant film on magnetic disk surface by atomic force microscopy
Author_Institution :
Div. of Data Storage & Retrieval, Hitachi Ltd., Kanagawa, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
We observed how PFPE lubricant film formed to magnetic disk surface using AFM with a fluoride coated probe. We found that PFPE lubricant did not uniformly cover the carbon protective surface but concentrated in valleys of surface roughness. The lubricant film has one to two step structure and the first step height is almost the same as the radius of molecular gyration. After the pin-on-disk test, the lubricant step height and the coverage increased, compared to the initial state
Keywords :
atomic force microscopy; hard discs; lubrication; surface topography; wear testing; PFPE lubricant film; atomic force microscopy; coverage; fluoride coated probe; magnetic disk surface; molecular gyration; pin-on-disk test; step height; surface roughness; valleys; Atomic force microscopy; Coatings; Force measurement; Lubricants; Magnetic films; Magnetic force microscopy; Probes; Rough surfaces; Scanning electron microscopy; Surface roughness;
Journal_Title :
Magnetics, IEEE Transactions on
