Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1980-04-21
1982-08-03
Sheehan, John P.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
75 05B, 148 3157, 148121, H01F 102
Patent
active
043426085
ABSTRACT:
Permanent magnet materials such as Al-Ni-Co-Fe, Mo-Co-Fe, and Co-Cr-Fe alloys comprise cobalt which has become increasingly expensive. Mn-Al is a cobalt-free magnet alloy which, according to the invention, is used to produce isotropic magnets having a maximum energy product of at least 1 million gauss-oersted. Magnets are produced by rapid quenching from a melt, e.g., by splat cooling, melt extraction, or helium blast cooling, followed by a magnetic aging heat treatment. Magnetic particles such as, e.g., fiber sections are bonded, bundled, or encased to form a magnet having desired shape.
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Bell Telephone Laboratories Incorporated
Businger Peter A.
Sheehan John P.
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