Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1992-11-20
1994-10-04
Wyszomierski, George
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148104, 419 12, H01F 4102
Patent
active
053523016
ABSTRACT:
A method is provided for forming a high energy product, anisotropic, hot pressed iron-rare earth metal permanent magnet without the requirement for magnetic alignment during pressing or additional hot working steps. The method of this invention includes providing a quantity of anisotropic iron-rare earth metal particles and hot pressing the particles so as to form a substantially anisotropic permanent magnet. The pressed permanent magnet of this invention permits a greater variety of shapes as compared to conventional hot worked anisotropic permanent magnets. As a result, the magnetic properties and shape of the permanent magnet of this invention can be tailored to meet the particular needs of a given application.
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Heisz et al, "Isotropic and Anisotropic Nd-Fe-B-Type Magnets by Mechanical Alloying and Hot Pressing", Applied Physics Letters, vol. 53, No. 4, 25 Jul. 1988, pp. 342-343.
Patent Abstracts of Japan, vol. 13, No. 433, 27 Sep. 1989, Publication No. JP 1-161802.
Croat John J.
Panchanathan Viswanathan
General Motors Corporation
Grove George A.
Wyszomierski George
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