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Giant Magnetoresistance Imaging for NDE of Conductive Materials

Published online by Cambridge University Press:  10 February 2011

E. S. Boltz ,
S. G. Albanna ,
A. R. Stallings ,
Y. H. Spooner  and
J. P. Abeyta
E. S. Boltz
Affiliation:
Marathon Sensors Inc., 3100 E. Kemper Rd., Cincinnati, OH 45241
S. G. Albanna
Affiliation:
TPL, Inc, 3921 Academy Pkwy. North, NE, Albuquerque, NM 87120
A. R. Stallings
Affiliation:
TPL, Inc, 3921 Academy Pkwy. North, NE, Albuquerque, NM 87120
Y. H. Spooner
Affiliation:
Superior MicroPowders, Albuquerque, NM
J. P. Abeyta
Affiliation:
TPL, Inc, 3921 Academy Pkwy. North, NE, Albuquerque, NM 87120
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Abstract

Traditional coil-based eddy-current sensors are severely limited in their ability to detect small buried defects, defects under fasteners and deeply buried cracks and corrosion. TPL has developed eddy-current sensors and arrays based on the use of Giant Magnetoresistance (GMR) sensor elements. GMR offers high sensitivity, very wide bandwidth and low noise from DC to over 1 GHz. Coupled with the ability to fabricate GMR sensors with micron-level dimensions, these new eddy-current sensors offer an ideal technology for inspections requiring high spatial resolution and low-frequency, deeply-penetrating fields.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 591 , 1999 , 151
Copyright
Copyright © Materials Research Society 2000

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References

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