| 摘要 |
A permanent magnet material has a principal phase of TbCu7 type crystal structure and improved magnetic properties. This permanent magnet material is represented by the general formula: R1xR2yBzNuM100-x-y-z-u, wherein R1 is at least one rare earth element including Y, R2 is at least one element selected from the group consisting of Zr, Hf and Sc, M is at least one element selected from Fe and Co, x, y, z and u are atomic percents individually defined as x>/=2, y>/=0.01, 4</=x+y</=20, 0</=z</=10, and 0<u</=20. The permanent magnet material has a principal phase of a TbCu7 type crystal structure. The permanent magnet material satisfies the relation of t</=60 and sigma /t</=0.7, wherein t(nm) is an average crystal grain size of the principal phase and sigma (nm) is a standard deviation of the crystal grain size. |
| 申请人 |
KABUSHIKI KAISHA TOSHIBA, KAWASAKI |
发明人 |
SAKURADA, SHINYA;ARAI, TOMOHISA;HASHIMOTO, KEISUKE;HIRAI, TAKAHIRO |
