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Rare earth-iron-boron permanent magnet - has main phase free from tin and an additional tin-contg. phase
Rare earth-iron-boron permanent magnet - has main phase free from tin and an additional tin-contg. phase
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机译:稀土-铁-硼永磁体-主相不含锡,并且含锡。相
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摘要
In a permanent magnet having the compsn. 8-30 at% RE (= rare earths including Y), 0.1-2 at% Sn, 2-28 at% B and balance Fe and contg. the tetragonal phase RE2Fe14B as main phase, the novelty is that the RE2Fe14B main phase is free from Sn and that the permanent magnet has a Sn-contg. additional phase contg. RE, Fe and Sn, pref. RE6Fe13Sn. Also claimed is a Sn content is added in the form of one or more Sn-contg. powders before compaction during prodn. of the permanent magnet by compacting alloy powders and then sintering. ADVANTAGE - Magnet has higher coercive field strength and improved temp. dependency of coercive field strength than conventional FEFeB permanent magnets.
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