Improved coating for amorphous alloy with low loss deterioration

Author

Okazaki, Yasuo ; Kanno, Hideo ; Sakuma, Eizou

Author_Institution

Nippon Steel Corp., Kitakyushu, Japan

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3352

Lastpage

3354

Abstract

Insulation coating for Fe-based amorphous ribbon was studied with emphasis on loss deterioration and interlayer insulation resistivity. An aluminum oxide coating was prepared by the solution anodic deposition process so that the coating thickness could be controlled in a range that did not decrease the packing factor. Even thin aluminum oxide coatings were found to have a high resistivity. Additional coating of one or more inorganic substances on the aluminum oxide results in low loss deterioration both in straight ribbon and toroidal cores. Magnetic domain observation reveals that stress induced by the aluminum oxide coating is relieved by the additional coating, which also enhances the corrosion resistance in a moist atmosphere

Keywords

alumina; anodised layers; boron alloys; corrosion protective coatings; ferromagnetic properties of substances; insulating coatings; iron alloys; magnetic cores; magnetic domains; magnetic leakage; magnetic properties of amorphous substances; metallic glasses; scanning electron microscope examination of materials; silicon alloys; Al₂O₃; FeSiBC; SEM; amorphous ribbons; annealing; coating thickness; corrosion resistance; insulation coating; interlayer insulation resistivity; loss deterioration; magnetic domain; packing factor; solution anodic deposition process; toroidal cores; Aluminum oxide; Amorphous materials; Coatings; Conductivity; Corrosion; Insulation; Magnetic cores; Magnetic domains; Stress; Thickness control;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42298

Filename

42298