RING-LIKE RARE EARTH SINTERED MAGNET AND MANUFACTURING METHOD THEREOF

文件类型：PDF文档
文件大小：120K
PROBLEM TO BE SOLVED : To realize a magnetic characteristic higher than that of an existing magnet.SOLUTION : A ring-like rare earth sintered magnet is formed by molding and sintering a material alloy powder containing R (R is at least any one of Y and a rare earth element), T (T is at least one kind of transition metal materials) and B as main components, and is subjected to polar anisotropic orientation when molding. The average grain size of the material alloy powder is 4.1-6.5 μm. The polar anisotropic orientation is preferably performed by application of pulse magnetic field. The external diameter is 7-11 mm. The internal diameter is 5-8 mm.COPYRIGHT : (C)2006, JPO&NCIPI