Title :
Improved coating for amorphous alloy with low loss deterioration
Author :
Okazaki, Yasuo ; Kanno, Hideo ; Sakuma, Eizou
Author_Institution :
Nippon Steel Corp., Kitakyushu, Japan
fDate :
9/1/1989 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
