| 简介 |
PROBLEM TO BE SOLVED : To attempt further improvement of a magnetic characteristic on a rare-earth sintered magnet of an R-T-B series, and prevent a crack on a rare-earth sintered magnet, thus realizing a favorable production yield.
SOLUTION : This presents a manufacturing method for a rare-earth sintered magnet manufactured by forming raw material alloy powder of R, T, and B as sintered main ingredients. Here, R is at least a kind of a rare-earth element. However, a rare-earth element includes Y according to a general idea. Further, T is at least a kind of a transition metal element. A pulsed magnetic field is applied at least once to the raw material alloy powder filled into a metal mold with a filling density of 1.8-2.3 g/cm3 and then, the raw material alloy powder is compressed, thus forming a rare-earth sintered magnet.
COPYRIGHT : (C)2006, JPO&NCIPI |
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