Acoustic emission study of lubricant effect on proximity contact recording

Author

Liu, Youmin ; Jiaa, Chi L. ; Eltoukhy, Atef

Author_Institution

StorMedia Inc., Santa Clara, CA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3160

Lastpage

3162

Abstract

Pseudo-impact contact at the interface between proximity sliders and magnetic rigid disks were investigated by acoustic emission (AE) technique. Under a hot/wet condition of 60°C/80%RH and an operation speed of 19.15 m/s., AE responses were collected in real-time to monitor interaction events at the head/disk interface (HDI). The profile of AE responses shows various events at the HDI which can be correlated to the micro-wear of the carbon overcoat and lubricant degradation. These events were also detected by optical surface analysis (OSA). These wear and degradation events indicate the need for choosing the proper lubricant and demonstrate that AE is a suitable tool to detect these events at the head/disk interface

Keywords

acoustic emission; hard discs; lubrication; magnetic heads; magnetic recording; 19.15 m/s; 60 C; acoustic emission; carbon overcoat; head/disk interface; lubricant degradation; magnetic rigid disk; micro-wear; optical surface analysis; proximity contact recording; proximity slider; pseudo-impact contact; Acoustic emission; Acoustic waves; Bandwidth; Capacitive sensors; Condition monitoring; Degradation; Disk recording; Event detection; Force measurement; Lubricants; Magnetic heads; Optical detectors; Strain measurement; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617877

Filename

617877