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发明公开
CN104674115A 一种低B的稀土磁铁 无效 - 撤回

一种低B的稀土磁铁
摘要：
本发明公开了一种低B的稀土磁铁，所述稀土磁铁含有R2T14B主相，包括如下的原料成分：R：13.5at％～14.5at％、B：5.2at％～5.8at％、和余量为T，所述的R为包括Nd的至少一种包含钇元素在内的稀土元素，所述T为包括Cu：0.3at％～0.8at％、Co：0.3at％～3at％和余量Fe的过渡金属元素。该稀土磁铁通过复合添加0.3～0.8at％的Cu和适量的Co，使得晶界中形成3种富Cu相，这种在晶界中存在的3种富Cu相的磁性效果和对晶界中B不足问题的修复，可显著改善磁铁的方形度和耐热性能。
摘要（英）：

The invention discloses a low-B rare earth magnet which contains a R2T14B main phase. The rare earth magnet is prepared from 13.5-14.5 at% of R, 5.2-5.8 at% of B and the balance of T. The R comprises Nd and is a rare earth element at least comprising yttrium; and the T comprises 0.3-0.8 at% of Cu, 0.3-3 at% of Co, and the balance of Fe of transition metals. By compositely adding 0.3-0.8 at% of Cu and a proper amount of Co into the rare earth magnet, three Cu-rich phases are formed in the grain boundary; and the magnetic effect of the three Cu-rich phases in the grain boundary and the restoration of the insufficient B in the grain boundary can obviously improve the square degree and heat resistance of the magnet.

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