FERROMAGNETIC AMORPHOUS ALLOY RIBBON AND FABRICATION THEREOF

摘要

A ferromagnetic amorphous alloy ribbon includes an alloy having a composition represented by Fe a Si b ,B c C d where 80.5 = a = 83 at.%, 0.5 = b = 6 at.%, 12 = c = 16.5 at.%, 0.01 = d =1 at.% with a + b + c + d = 100 and incidental impurities, the defect length along a direction of the ribbon's length being between 5 mm and 200 mm, the defect depth being less than 0.4x t µ?? and the defect occurrence frequency being less than 0.05x w times within 1.5 m of ribbon length, where f and w are ribbon thickness and ribbon width, respectively, and the ribbon in its annealed state and straight strip form of the ribbon, has a saturation magnetic induction exceeding 1.60 T, and exhibits a magnetic core loss of less than 0.14 W/kg when measured at 60 Hz and at 1.3 T induction level. The ribbon is suitable for use in transformer cores, rotational machines, electrical chokes, magnetic sensors and pulse power devices.