A novel accelerated wear test for magnetic recording disks

Author

Peck, P.R. ; Kono, R.N. ; Jhon, M.S. ; Karis, T.E.

Author_Institution

Dept. of Chem. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3969

Lastpage

3971

Abstract

Future disk files will operate at lower flying height, thus increasing the possibility of asperity contacts. Conventional tests include sliding (pin-on-disk or slider-on-disk), flying (flyability tests), or contact start/stop modes of operation. A novel accelerated water test (NAWT) was developed to produce intermittent asperity contacts. The NAWT operates in a mixed sliding and flying region, and is designed to operate in a zone of interaction where a significant number of asperity contacts occur. The NAWT uses an acoustic emission sensor to detect asperity contacts. The signal is processed by fast Fourier transform to detect significant increase in the frequency and severity of the contacts. The new apparatus and procedure are presented along with illustrative results

Keywords

acoustic emission testing; life testing; magnetic disc storage; wear testing; accelerated water test; accelerated wear test; acoustic emission sensor; asperity contacts; contact start/stop modes; fast Fourier transform; flyability tests; flying height; magnetic recording disks; zone of interaction; Acoustic emission; Acoustic signal detection; Automatic testing; Computer crashes; Life estimation; Magnetic heads; Magnetic recording; Rough surfaces; Surface roughness; Vehicle crash testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281359

Filename

281359