| 简介 |
The present disclosure provides a rare earth magnet having a main phase and a grain boundary phase and a manufacturing method therefor. In the rare earth magnet of the present disclosure, the overall composition is represented by a formula (R1(1-x-y)LaxCey)u(Fe(1-z)Coz)(100-u-w-v)BwM1v. (R1 is a predetermined rare earth element, M1 is a predetermined element, and the followings are satisfied, 0.05≤x≤0.25, 0.5≤y/(x+y)≤0.50, 13.5≤u≤20.0, 0≤z≤0.100, 5.0≤w≤10.0, and 0≤v≤2.00). The main phase has an R2Fe14B-type crystal structure, and the average grain size and the volume fraction of the main phase are respectively 1.0 μm to 20.0 μm and 80.0% to 90.0%. The main phase and the grain boundary phase satisfy, (the existence proportion of La in the grain boundary phase)/(the existence proportion of La in the main phase)>1.30. |
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