| 摘要 |
PURPOSE:To maintain and ensure the same shape arbitrariness and thermal stability as a resin magnet and realize a rare earth-iron permanent magnet having performance superior to the magnetic stability of a hot press magnet by making a rare earth-iron thin piece obtained by ultra-quenching be an aggregate of an arbitrary shape and by fixing the thin films. CONSTITUTION:By using DC discharge used as a method of generating discharge plasma, an aggregate of a rare earth-iron thin piece obtained by ultra-quenching is made to transit to an active state, and thereafter is resistance-sintered. Therefore, since not only a rare earth-iron permanent magnet of an arbitrary shape can be obtained very speedily, but the production or/and growth of phase B of R2Fe(Co)14 is suppressed, the thermal stability of a permanent magnet is not degraded due to a considerable decrease in the specific coercive force Hcj of the original thin piece or in its temperature coefficient. Further, since a plastic deformation of the thin piece is promoted, partial magnetic anisotropy in a pressure axial direction progresses, and high magnetic performance can be ensured. |
