| 简介 |
PROBLEM TO BE SOLVED : To provide an exchange spring magnet material which is high in density and whose crystal grains are anisotropic, and to provide a method of manufacturing the same. SOLUTION : An alloy which contains rare earth elements and which has not yet been hydrogenated is ground into raw material powder, and the material powder is compression-molded by a molding die as being oriented under a magnetic filed. In this state, the molded body is subjected to hydrogenation and dehydrogenation processing at a temperature of 700 deg.C or higher and then pressurized in a process in which temperature is made to drop, by which an anisotropic bulk exchange spring magnet provided with a soft and a hard phase can be obtained, where the axis of easy magnetization of the crystalline direction in the hard phase is lined up in one direction. |
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