Improvement of magnetic interface coupling through a magnetic coupling gel

Author

Chen, Z.J. ; Negley, M. ; Jiles, D.C. ; Sahlik, M.J.

Author_Institution

Ames Lab., Iowa State Univ., Ames, IA, USA

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

4029

Lastpage

4031

Abstract

Surface measurement of magnetic properties is potentially a very advantageous technique for nondestructive evaluation. The effect of a magnetic coupling gel on surface magnetic measurement, is reported in this paper. Test results under three interface conditions are presented and compared. It was found that the magnetic gel reduces the variability of the measurement by improving the magnetic interface coupling between the sensor and test specimen. A simple model of a magnetic circuit is analyzed to show the coupling function of magnetic gel. From these results, it is deduced that the magnetic coupling gel plays an important part in improving reliability of the magnetic measurements

Keywords

gels; interface magnetism; magnetic field measurement; magnetic fluids; magnetic hysteresis; magnetic permeability; nondestructive testing; surface magnetism; coupling function; magnetic circuit; magnetic coupling gel; magnetic interface coupling; magnetic properties; surface measurement; Coupling circuits; Inspection; Magnetic field measurement; Magnetic flux; Magnetic heads; Magnetic hysteresis; Magnetic sensors; Magnetic variables measurement; Permeability measurement; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.489851

Filename

489851