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US 2012/0235778 A1Published application
R-t-b rare earth sintered magnet
AssigneeTDK Corporation
InventorsRyota KUNIEDA, Tetsuya CHIBA, Takuma HAYAKAWA, Atsushi FUJIWARA
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Abstract
The invention provides an R-T-B rare earth sintered magnet 100 including R2T14B-containing crystal grains as the main phase 10, and having an RL-T-M1 based compound 12 at the grain boundary triple points, wherein R represents a rare earth element, T represents at least one element selected from among Fe, Co and Cu, B represents boron, RL represents a light rare earth element, and M1 represents at least one element selected from among Al, Zn and Ga.
Claims7
An R-T-B rare earth sintered magnet comprising:
- an R2T14B-containing crystal grain as the main phase, and
- an RL-T-M1 based compound at the grain boundary triple points,
- wherein R represents a rare earth element, T represents at least one element selected from among Fe, Co and Cu, B represents boron, RL represents a light rare earth element, and M1 represents at least one element selected from among Al, Zn and Ga.
Dependencies are inferred from the claim text.