| 简介 |
PROBLEM TO BE SOLVED : To provide a rare-earth magnet in which a high coercive force and a high residual magnetic flux density can become compatible, and to provide a method of manufacturing the same.
SOLUTION : The rare-earth magnet includes a layer grain boundary phase formed in the part of the grain boundary of an Nd2Fe14B which is the main phase of an R-Fe-B (R is a rare-earth element) magnet. The grain boundary phase contains a fluorine compound. The thickness of the fluorine compound is 10 μm or the thickness of the fluorine compound is 0.1 μm to 10 μm. The main phase particle coverage of the fluorine compound is 50% or higher in average. And, after the fluorine compound of powder formed in a plate shape in the grain boundary phase is formed in a layer state, after the fluorine compound has been vacuum-melted at a predetermined temperature, the fluorine compound is quenched or it is manufactured, by heating and pressurizing the main phase and the fluorine compound and the fluorine compound is formed in a layer state along the grain boundary phase.
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