The invention relates to the
metallurgy field and discloses novel
samarium-
cobalt-base nano-composite permanent magnetic material. The
samarium cobalt base is (Sm, R)1(Co, Fe, Cu, Zr)7 in type and comprises a TbCu7 type structure, and Co is partially replaced by Fe, Cu and Zr; Re is any one of heavy
rare earth Lu, Dy and Tb and partially replaces Sm. The preparation method includes steps that 1) mixing raw materials of the
samarium cobalt base according to proportion, and
smelting to obtain a 1: 7 type
samarium cobalt base
alloy ingot; 2) ball milling the
alloy ingot through a high-energy ball milling technique, mixing with Fe
powder according to proportion, and performing high-energy ball milling to obtain nanocrystalline composite
magnetic powder; 3) carrying out annealing heat treatment on the nanocrystalline composite
magnetic powder. According to the samarium-cobalt-base nanocrystalline permanent
magnet material and the preparation method thereof, the soft / hard-
magnetic phase composite
magnetic powder is prepared through the high-energy ball milling,
laser heat treatment and other techniques, a high
magnetic energy product is obtained through exchange
coupling between the nanocrystalline hard
magnetic phase and nanocrystalline soft
magnetic phase, and meanwhile, because rare-earth Fe phase is not used, the cost is lowered, and the operation technique is simplified.