Metglas, Inc.

Hitachi Metals, Ltd.

Proterial, Ltd.

Donald Robert Reed, Jr

Eric Theisen

Ronald Joseph Martis

Naoki Ito

John Paul Webb

Joseph Custis Boggs

Thomas Joseph Hastie

Norman Eugene Fuller, Jr

Donald E Granger, Jr

The invention relates to the reduction of core losses in soft magnetic applications utilizing amorphous foil as the core material. Amorphous foil is known to have lower losses when compared to crystalline silicon steel laminations. It is found that a reduction of 10-40% of losses can be achieved over the current state of the art amorphous material by mechanical scribing of the surface of the soft magnetic laminations comprising the wound core in power conditioning devices such as a transformer. The scribing process introduces control of the magnetic domains causing ease of magnetic flux reversal

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

An apparatus for annealing alloy ribbon, the apparatus comprising: an unwinder unwinding an alloy ribbon from a spool of the alloy ribbon; a heating member comprising a first flat surface, on which the alloy ribbon unwound by the unwinder runs while contacting the first flat surface, the heating member heating the alloy ribbon running while contacting the first flat surface through the first flat surface; a cooling member comprising a second flat surface, on which the alloy ribbon heated by the heating member runs while contacting the second flat surface, the cooling member cooling the alloy ribbon running while contacting the second flat surface through the second flat surface; and a winder winding the alloy ribbon cooled by the cooling member.

Apparatus for annealing alloy ribbon and method of producing annealed alloy ribbon

An iron-based soft magnetic alloy greater than 63.5 mm in width, a thickness between 13 and 20 microns and having a composition represented by the following formula:(FeM)CuSiBM'M&#x2033;Xwherein M is Co and/or Ni, M&#x2032; is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, M&#x2033; is at least one element selected from the group consisting of V, Cr, Mn, Al, elements in the platinum group, Sc, Y, rare earth elements, Au, Zn, Sn and Re, X is at least one element selected from the group consisting of C, Ge, P, Ga, Sb, In, Be and As, and a, x, y, z, p, q and r respectively satisfy 0&#x2264;a&#x2264;0.5, 0.1&#x2264;x&#x2264;3, 0&#x2264;y&#x2264;30, 1&#x2264;z&#x2264;25, 5&#x2264;y+z&#x2264;30, 0.1&#x2264;p&#x2264;30, q&#x2264;10 and r&#x2264;10, the alloy being at least 50% crystalline with an average particle size of 100 nm or less. This alloy has low core loss, high permeability and low magnetostriction.

Wide iron-based amorphous alloy, precursor to nanocrystalline alloy

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Conway, SC, United States of America

Donald Robert Reed, Jr