Glassy metal fabric: A unique magnetic shield

Metallic glass ribbon of the composition Fe40Ni40P14B6, METGLAS® alloy 2826, has been produced in kilogram quantities with controlled magnetic properties. Cylindrical shields have been made by interlacing such ribbons using three different methods. Shielding ratios have been measured at 60 Hz for the cylindrical shields and compared with an equal weight shield wrapped from polycrystalline 80/20 NiFe foil. Shielding ratios of woven metallic glass compare favorably with equal weight polycrystalline foil shields. The woven metallic glass shield also has the important advantage of being flexible and less sensitive to mechanical strain.