Alliedsignal Inc.

Allied Corporation

Christopher A Bruckner

Davidson M Nathasingh

John Silgailis

A method of rapidly annealing an amorphous alloy consisting of applying a magnetic field to the alloy, immersing the alloy in a liquid comprising molten tin and then placing the amorphous alloy in a cooling fluid. The cooling fluid may be an organic liquid or liquefied gas. Rapid magnetic annealing provides advantages not only of less time and energy costs, but also yields an annealed alloy that is more ductile than those of the prior art. The greater ductility permits the amorphous alloy to be annealed by this method and then rewound into a core.

Rapid magnetic annealing of amorphous metal in molten tin

A magnetic core is disclosed comprising a plurality of stacked laminations of metallic glassy ribbon. The laminations are arranged in groups of at least two laminations, with the laminations of each group being arranged to compensate for cross-sectional non-uniformity present in laminations comprising each group, thereby producing groups having substantially parallel top and bottom planar surfaces. The groups are then stacked in partially overlapping relationship to define a closed loop magnetic core. Cores formed from such groups of laminations exhibit reduced core losses as compared to prior art stacked cores.

Stacked lamination magnetic cores

A method of rapidly annealing an amorphous metal core consists of applying a magnetic field to the core, immersing the core in a hot liquid for a period of time, and then placing the core in a cooling fluid. The hot liquid is preferably a molten metal or molten metal alloy, such as molten tin or solder. The cooling fluid may be an organic liquid or liquefied gas. Rapid magnetic annealing provides advantages not only of less time and energy costs, but also yields an annealed core that is more ductile than those of the prior art. The greater ductility permits a wound core to be annealed by this method and then rewound into another core.

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Madison, NJ, United States of America

Christopher A Bruckner