Process for in-line mechanically scribing of amorphous foil for magnetic domain alignment and core loss reduction

An amorphous core comprising an amorphous foil having a width of 75 to 260 mm and a uniform scribed pattern with a wavelength of 1 to 5 mm across the amorphous foil,

• wherein the scribed pattern is formed by a capillary vibration in a molten metal puddle, the capillary vibration is controlled by a frequency of the capillary vibration, the frequency of the capillary vibration is represented by f~(σ/ρ*G3)1/2, where ρ represents a density of a molten metal, G represents a gap height between a nozzle and a chill wheel surface where the molten metal puddle forms during processing, and σ represents a surface tension of the molten metal, and the frequency of the capillary vibration is dependent on the gap height, wherein the amorphous foil is wound into a toroidal core or into a laced distribution transformer core, and wherein the amorphous core has reduced losses of core losses less than 0.2 W/kg when tested at 1.4 T, 60 Hz and less than 0.17 W/kg when tested at 1.3 T, 60 Hz.

An amorphous foil having a width of 75 to 260 mm and a uniform scribed pattern with a wavelength of 1 to 5 mm across the amorphous foil,

• wherein the scribed pattern is formed by a capillary vibration in a molten metal puddle, the capillary vibration is controlled by a frequency of the capillary vibration, the frequency of the capillary vibration is represented by f~(σ/ρ*G3)1/2, where ρ represents a density of a molten metal, G represents a gap height between a nozzle and a chill wheel surface where the molten metal puddle forms during processing, and σ represents a surface tension of the molten metal, and the frequency of the capillary vibration is dependent on the gap height, wherein the amorphous foil is tested in a single sheet configuration, and wherein the amorphous foil has reduced losses of core losses less than 0.08 W/kg when tested at 1.4 T, 60 Hz and less than 0.06 W/kg when tested at 1.3 T, 60 Hz.