Abstract: A method of producing an amorphous alloy ribbon having a composition of Fe100-a-bBaSibCc (13.0 atom %?a?16.0 atom %, 2.5 atom %?b?5.0 atom %, 0.20 atom %?c?0.35 atom %, and 79.0 atom %?(100-a-b)?83.0 atom %) includes: preparing an alloy ribbon; and, in a state in which the alloy ribbon is tensioned with a tensile stress of from 5 MPa to 100 MPa, increasing a temperature of the alloy ribbon to from 410° C. to 480° C., at an average temperature increase rate of from 50° C./sec to less than 800° C./sec, and decreasing a temperature of the thus heated alloy ribbon to a temperature of a heat transfer medium for temperature-decreasing, at an average temperature decrease rate of from 120° C./sec to less than 600° C./sec, with performing the increase and decrease of temperature being performed by contacting the traveling alloy ribbon with a heat transfer medium.

Abstract: A method of producing an amorphous alloy having a composition of Fe100-a-bBaSibCc (13.0 atom %?a?16.0 atom %, 2.5 atom %?b?5.0 atom %, 0.20 atom %?c?0.35 atom %, and 79.0 atom %?(100?a?b)?83.0 atom %) includes: preparing an alloy ribbon; and, in a state in which the alloy ribbon is tensioned with a tensile stress of from 20 MPa to 80 MPa, increasing a temperature of the alloy ribbon to from 410° C. to 480° C., at an average temperature increase rate of from 50° C./sec to less than 800° C./sec, and decreasing a temperature of the thus heated alloy ribbon to a temperature of a heat transfer medium for temperature-decreasing, at an average temperature decrease rate of from 120° C./sec to less than 600° C./sec.

Abstract: A bulk amorphous metal inductive device comprises a magnetic core having at least one low-loss bulk ferromagnetic amorphous metal magnetic component forming a magnetic circuit having an air gap therein. The component comprises a plurality of similarly shaped layers of amorphous metal strips bonded together to form a polyhederally shaped part. The device has one or more electrical windings and is easily customized for specialized magnetic applications, e.g. for use as a transformer or inductor in power conditioning electronic circuitry employing switch-mode circuit topologies and switching frequencies ranging from 1 kHz to 200 kHz or more. The low core losses of the device, e.g. a loss of at most about 12 W/kg when excited at a frequency of 5 kHz to a peak induction level of 0.3 T, make it especially useful at frequencies of 1 kHz or more.