R-T-B sintered magnets

专利名称：R-T-B sintered magnets发明人：藤原 真理子,三輪 将史申请号：JP2018062776申请日：20180328公开号：JP2019176011A公开日：20191010

专利附图：

摘要：Problem to be solved: to provide an R-T-B sintered magnet excellent incorrosion resistance. R-T-B sintered magnet 2Rare earth element RTransition metalelement tBContaining GA and oSintered magnet 2The magnet body 4 and the oxide layer6 covering the magnet body 4 are provided.Magnet bodyThe main phase particle 8

containing the crystal ofContains a grain boundary phase 1 located between the mainphase particles 8 and containing RThe oxide layerRTContains multiple oxide phases 3Acontaining GA and oOxide phase 3AThe following formula (1) and the following formula(2) are satisfied for the content of each element (unit: atomic%).Oxide phase 3a in oxidelayerThe grain boundary phase 1 in the magnet body 4 is covered.0.3 ≦ [R] \\/ [t] ≦ 0.5 (1)0.2. Lar. [O] \\/ ([R] + [t] + [GA] + [O]). Leq. 0.7 (2) Diagram

申请人：ＴＤＫ株式会社

地址：東京都中央区日本橋二丁目５番１号

国籍：JP

代理人：長谷川 芳樹,黒木 義樹,三上 敬史

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