Fe--Cr--Co Magnets by powder metallurgy processing

Details Fe--Cr--Co Magnets by powder metallurgy processing Fe--Cr--Co Magnets by powder metallurgy processing

1981-12-07

1983-08-30

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148102, 419 36, 419 38, H01F 102

Patent

active

044014821

ABSTRACT:
Fe--Cr--Co alloys have found application in the manufacture of permanent magnets on account of magnetic properties such as, high coercive force, remanent magnetization, and energy product. A method is disclosed for producing magnetic articles comprising Fe, Cr, and Co from powders comprising elemental or pre-alloyed particles. A powder is mixed with an essentially noncarbonizing organic binder, compressed, heated to remove binder, sintered, and aged. Heating results in essentially complete removal of binder prior to sintering.
Magnetic bodies produced according to the disclosed method typically comprise less than 1 weight percent of undesirable nonmagnetic phases and have a maximum energy product of at least 1 million gauss oersted.

REFERENCES:
patent: 2546047 (1951-03-01), Studders
patent: 3901742 (1975-08-01), Facaros
patent: 3954519 (1976-05-01), Inoue
patent: 3970485 (1976-07-01), Doser
patent: 4075437 (1978-02-01), Chin et al.
patent: 4174983 (1979-11-01), Chin et al.
Treatise on Powder Metallurgy, Claus G. Goetzel, Interscience Publishing Inc., New York, vol. 1, 1949, pp. 254-255.

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