Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1995-11-28
1997-04-29
Sheehan, John
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148104, H01F 4102
Patent
active
056245033
ABSTRACT:
A process for producing a magnet in which the content of anisotropic magnet powder is from 95 to 50% by weight. The process includes the following steps. A powder mixture composed of the anisotropic magnet powder and solder powder containing isotropic magnet powder as a main constituent thereof is charged in a compacting mold. The powder mixture in a cavity is orientated in a magnetic field. It is compressed and Joule heated. Thus, the powder mixture is fixed. When the powder mixture is fixed into a magnet, the ratio (Po/Lo) of the average grain size Po of the anisotropic magnet powder to the size of the magnet Lo which size is measured in the orientation direction is preferably 0.6 or more.
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Matsushita Electric - Industrial Co., Ltd.
Sheehan John
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