Method of making sintered compact for rare earth magnet

Details Method of making sintered compact for rare earth magnet Method of making sintered compact for rare earth magnet

2006-06-06

2006-06-06

Sheehan, John P. (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C148S102000, C148S103000, C148S104000, C148S122000, C419S012000, C419S030000, C419S033000, C419S038000

Reexamination Certificate

active

07056393

ABSTRACT:
A method of making a sintered body for a rare earth magnet includes 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. The first and second fine powders each includes a main phase represented by (LR1-xHRx)2T14A, where T is Fe and/or at least one non-Fe transition metal element; A is boron and/or carbon; LR is at least one light rare earth element; HR is at least one heavy rare earth element; and 0≦x<1.

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