Method of manufacturing a high permeability amorphous magnetic a

Details Method of manufacturing a high permeability amorphous magnetic a Method of manufacturing a high permeability amorphous magnetic a

1980-05-28

1982-01-19

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 3, 148101, H01F 100

Patent

active

043115390

ABSTRACT:
A method of manufacturing an high permeability amorphous magnetic alloy is disclosed. In the method, an amorphous alloy ribbon is annealed at an elevated temperature T(.degree.K.) satisfying the relation 0.95.times.Tc (.degree.K.).ltoreq.T(.degree.K.)<Tcry(.degree.K.) where Tc is a magnetic Curie temperature and Tcry is a crystallization temperature of the alloy. Then the ribbon is quenched to a room temperature from the elevated temperature. The quenched amorphous alloy ribbon is again annealed at a temperature between 100.degree. C. and 250.degree. C. By the method, the amorphous magnetic alloy shows a high permeability over a wide frequency range and flat frequency response characteristics of permeability over a wide frequency range.

REFERENCES:
patent: 4056411 (1977-11-01), Chen et al.
patent: 4187128 (1980-02-01), Billings et al.

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