Effects of Gas Physical Properties on Flying Performance of Air Bearing Slider

Author

Zhou, Weidong ; Liu, Bo ; Yu, Shengkai ; Hua, Wei ; Gonzaga, Leonard

Author_Institution

Data Storage Inst., A*STAR (Agency for Sci., Technol. & Res.), Singapore, Singapore

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1389

Lastpage

1392

Abstract

The temperature effects of gas physical properties, such as the dynamic viscosity and mean free path on the gas bearing force and flying attitude of a slider, were studied based on a generalized lubrication equation derived from the Boltzmann equation. The simulation studies showed that these variations with the environmental temperature are relatively small in an unsealed disk drive, but they are significant in a fully sealed one. By evaluating temperature effects in a sealed drive filled with various gases, we present an acceptable lubricating gas selection criterion for the future ultra-thin film bearings from the viewpoint of head-disk interface properties.

Keywords

Boltzmann equation; disc drives; hard discs; lubrication; machine bearings; magnetic heads; viscosity; Boltzmann equation; air bearing slider; dynamic viscosity; flying attitude; flying performance; gas bearing force; gas physical properties; generalized lubrication equation; head-disk interface; lubricating gas selection criterion; mean free path; temperature effects; ultrathin film bearings; unsealed disk drive; Boltzmann equation; Corrosion; Disk drives; Gases; Lubricants; Lubrication; Magnetic films; Magnetic heads; Magnetic recording; Temperature; Air bearing slider; disk drives; flying height; head-disk interface; magnetic recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2039854

Filename

5467632