Patent ID: 7056393

Claim:
A method of making a sintered body for a rare earth magnet, the method comprising the steps of: (a) preparing a first coarse powder by coarsely pulverizing a rare earth alloy sintered body by a hydrogen pulverization process; (b) preparing a first fine powder by finely pulverizing the first coarse powder; (c) preparing a second fine powder by pulverizing an alloy block of a rare earth alloy material; and (d) sintering a mixed powder including the first and second fine powders; wherein each of the first and second fine powders includes a main phase having a composition represented by the general formula: (LR 1-x HR x ) 2 T 14 A, where T is either Fe alone or a mixture of Fe and at least one transition metal element other than Fe; A is either boron alone or a mixture of boron and carbon; LR is at least one light rare earth element; HR is at least one heavy rare earth element; and 0≦x<1.