Rare earth magnet and a method for manufacturing compactable powder for the rare earth magnet without jet milling

A method of manufacturing a rare earth magnet without jet milling, the rare earth magnet comprising a R2T14B main phase, where R is at least one rare earth element including yttrium, and T is at least one transition metal element including Fe, wherein the method comprises the steps of:

• casting a molten alloy of a rare earth magnet raw material by strip casting to obtain a quenched alloy having an average thickness ranging from 0.2˜0.4 mm;
• putting the quenched alloy and a plurality of rigid balls into a rotatable hydrogen decrepitation container;
• rotating the rotatable hydrogen decrepitation container to hydrogen decrepitate and simultaneously ball milling to crush the quenched alloy under a hydrogen pressure ranging between 0.01 to 1 MPa and produce a mixture;
• dehydrogenating and simultaneously ball milling by rotating the rotatable hydrogen decrepitation container to crush the mixture and produce compactable powder;
• screening the compactable powder from the plurality of rigid balls to remove the plurality of rigid balls;
• compacting, after screening and without further pulverization of the compactable powder after dehydrogenating and simultaneously ball milling, the compactable powder in a two-part compacting method comprising magnetic field compacting and isostatic pressing compacting to provide a green compact;
• and
• sintering the green compact to provide the rare earth magnet, wherein the rare earth magnet is a permanent magnet,
• wherein the plurality of rigid balls does not break during rotating the rotatable hydrogen decrepitation container.