The frictional behavior of thin film magnetic disks

Author

Yang, M. ; Ganapathi, S.K. ; Balanson, R.D. ; Talke, Frank E.

Author_Institution

Center for Magnetic Recording Res., California Univ., San Diego, CA, USA

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

5157

Lastpage

5159

Abstract

The frictional behavior of carbon-overcoated disks is studied under constant speed drag testing conditions. The effects of linear velocity, environmental conditions, and surface contamination on the friction at the head/disk interface are investigated. The results suggest that the friction build-up as a function of repeated passes may be related to changes in the carbon-hydrogen bonds in the carbon overcoat. During sliding in air, oxygen or water vapor may affect the C-H bonds, which may in turn be responsible for the observed friction increase. This phenomenon is influenced by the temperature at the interface of sliding, the environmental conditions, and the surface cleanliness of the disk

Keywords

bonds (chemical); carbon; environmental degradation; friction; magnetic disc storage; magnetic thin film devices; surface chemistry; wear resistant coatings; C overcoated disks; C overcoats; C-H bonds; constant speed drag testing; environmental conditions; friction build-up; frictional behavior; head/disk interface; linear velocity; repeated passes; sliding velocity; surface cleanliness; surface contamination; thin film magnetic disks; wear resistant coatings; Friction; Heating; Magnetic films; Magnetic memory; Magnetic recording; Nitrogen; Protection; Strain measurement; Surface contamination; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278772

Filename

278772