| 摘要 |
PURPOSE:To obtain a rare earth permanent magnet where a corrosion resistance is improved, by wrapping a magnetic phase with a kind or two kinds of compounds of R(Cu1-xTx) and R(Cu1-yTy)2 where R represents rare earth elements including Y, T is transition metals, and x, y is a range of 0-0.2. CONSTITUTION:An R2T14B phase is dispersed in a matrix material consisting of a kind or more of compounds as a principal composition which is selected out of phases R(Cu1-xTx) and R(Cu1-yTy)2 where x, y represent a range of 0-0.2 and R is rare earth elements including Y, and T is transition metals. The volumetric distribution ratio of R(Cu1-xTx) in the matrix is less than 50%. These properties make it possible to obtain a rare earth permanent magnet having a corrosion resistance which is exceedingly greater than that of conven tional Nd-Fe-B magnets. |
