Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1976-09-07
1978-03-28
Satterfield, Walter R.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
75122, 148 28, 148108, 148122, H01F 100
Patent
active
040812987
ABSTRACT:
A process is provided for improving magnetic properties of certain glassy metal alloys which comprises immersing toroidally wound cores of glassy metal alloy filaments in a thermally stable, nonferromagnetic, electrically inert and chemically unreactive liquid, maintaining the liquid at a temperature of between about 310.degree. and 350.degree. C for about 3/4 to 8 hrs., depending on the temperature selected, and cooling the filament to about 25.degree. C at a rate not greater than about 30.degree. C/min. through its Curie temperature. Optionally, a magnetic field of about 1 to 10 Oe may be applied circumferentially around the cores during cooling through the Curie temperature to further improve the magnetic properties of the glassy metal alloy.
REFERENCES:
patent: 3614893 (1971-10-01), Nesbitt et al.
patent: 3820040 (1974-06-01), Berry et al.
patent: 3856513 (1974-12-01), Chen et al.
patent: 3865784 (1975-02-01), Neale et al.
Polk, D. et al., Formation & Properties of Glassy Ni-Fe Alloys, in Journ. Non-Cryst. Sol., June 15, 1974, p. 167.
Durand Kevin James
Mendelsohn Lewis Isaac
Nesbitt Ethan Allen
Allied Chemical Corporation
Collins David W.
Fuchs Gerhard H,.
Satterfield Walter R.
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