Local fluctuation of rigid magnetic disk durability

Author

Belonogov, M.V. ; Kurnosov, S.K. ; Petinov, V.I.

Author_Institution

Inst. of Chem. Phys., Acad. of Sci., Chernogolovka, USSR

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

2511

Lastpage

2513

Abstract

A method of friction, wear, and temperature-rise measurement in local areas of a disk surface with 30-μm resolution has been developed. An indenter-thermocouple is designed to measure temperature in the contact region. The indenter has a small contact area with the coating and forms a narrow track on the disk surface. The method allows detection of asperities and local peculiarities of the disk surface, where a disk/head failure can occur. The durability of rigid-disk coatings with different lubricant layers was studied. Microscopic investigations of the surface areas where deviations from the average tribology characteristics take place allow them to be related to local nonhomogeneities of coatings and lubricant layers. It is shown that peculiarities of tribological properties are connected with coating asperities of about 10 μm. The temperature-rise measurements give more information about the coating tribology than conventional friction-coefficient measurements

Keywords

fluctuations; friction; hard discs; magnetic recording; temperature measurement; wear; asperities; average tribology characteristics; coating; contact region; disk surface; disk/head failure; friction; indenter-thermocouple; local areas; local fluctuation; local nonhomogeneities; local peculiarities; lubricant layers; narrow track; rigid magnetic disk durability; temperature-rise measurement; wear; Cascading style sheets; Differential amplifiers; Fluctuations; Friction; Lubricants; Magnetic heads; Measurement standards; Optical interferometry; Temperature sensors; Time measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104780

Filename

104780