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Primary ultrafine-crystalline alloy ribbon and its cutting method, and nano-crystalline, soft magnetic alloy ribbon and magnetic device using it

A method for cutting a primary ultrafine-crystalline alloy ribbon having a structure in which ultrafine crystal grains having an average grain size of 30 nm or less are dispersed in a proportion of 5-30% by volume in an amorphous matrix, comprising placing the ribbon on a soft base deformable to an acute angle by local pressing, bringing a cutter blade into horizontal contact with a surface of the ribbon, and pressing the cutter to the ribbon to apply uniform pressure thereto, thereby bending the ribbon along a cutter blade edge to brittly fracture-cut the ribbon.
Owner:HITACHI METALS LTD
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