Near-zero magnetostrictive amorphous alloy with high...

Details Near-zero magnetostrictive amorphous alloy with high... Near-zero magnetostrictive amorphous alloy with high...

C - Chemistry, Metallurgy

22

C

31/149, 75/1.1

C22C 19/07 (2006.01) C22C 45/04 (2006.01) H01F 1/153 (2006.01)

Patent

CA 1082491

ABSTRACT OF THE DISCLOSURE A new series of glassy metal alloys with near-zero magneto- striction is disclosed. The glassy alloys have the composition (Cox Fe1-x)aBbCc, where "x" ranges from about 0.84 to 1.0, "a" ranges from about 78 to 85 atom percent, "b" ranges from about 10 to 22 atom percent and "c" ranges from 0 to 12 atoms percent, with the proviso and the sum of "b" and "c" ranges from about 15 to 22 atom percent. The magnetostriction of these alloys ranges from about +5 x 10-6 to -5 x 10-6 and the saturation induction is at least about 10 kGauss. The transition metal content is responsible for the low magnestostric- tion in these alloys, as well as their high saturation induction. The metalloid content (needed to stabilize the glassy state which is one of low anisotropy) strongly affect the saturation induction and Curie temperature, but not the magnestostriction. The near-zero magnetostrictive amorphous alloys of the present invention find use in a variety of tape-wound and laminated core devices, such as power transformers and signal transformers.

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