| 摘要 |
PURPOSE:To make a consideration for an eddy-current loss unnecessary, by hot-pressing in a metallic mold the material wherein glass flakes are blended with a quickly cooled magnet material made of a rare earth element-iron based alloy. CONSTITUTION:In a material 4, glass flakes, each including SiO2 as its principal component, are blended with a magnet material obtained by cooling quickly the molten alloy which includes rare earth element R, typical transition metal Fe, and B in the ratio of 2:14:1. The blended material 4 is compressed with the end faces of twin thermally compensating materials 3a, 3b via electrodes 2a, 2b. Successively, a discharge is performed to the blended material 4. Thereafter, a current is directly applied to the blended material 4 via the twin thermally compensating materials 3a, 3b and the electrodes 2a, 2b. When heating the blended material 4 in a cavity to a temperature not lower than the crystallization temperature of the quickly cooled magnet material under a compressive pressure, it is subjected to a plastic deformation, and is made minute. Thereby, since the blended material has the large residual magnetization and moreover has the structure wherein electrically insulating layers are arranged in a specified direction in a magnetic organization, its eddy-current loss can be decreased when mounting it as a rotor. |
