| 摘要 |
PROBLEM TO BE SOLVED: To provide a nanocomposite crystalline sintered magnet of high density and performance at a low cost by molding/solidifying a quench alloy at a lower pressure and temperature. SOLUTION: Quenching/solidifying is performed after a molten metal 21 of an alloy, which is represented, in a general expression either by Fe100-x-yRxBy, Fe100-x-y-zRxByCoz, Fe100-x-y-uRxByMu, or Fe100-x-y-z-uRxByCozMu is prepared. Then the solidified alloy powder is pressurized/sintered to manufacture a sintered magnet. When an alloy molten metal, which satisfies 1 atom %<=x<=7 atom %, 15 atom %<=y<=20 atom %, 0.2 atom %<=z<=7 atom %, and 0.01 atom %<=u<=7 atom %, is quenched and solidified, it turns into an amorphous state, and shows glass transition at a temperature lower than a crystallization temperature before softening. By utilizing the softening phenomenon, the sintered magnet of a Fe3B/R2Fe14B nanocomposite crystalline which is superior in magnetic characteristics is manufactured at low temperatures and pressures. |
