PROCESS AND SYSTEM FOR PRODUCING GRANULATION POWDER OF RARE EARTH ALLOY AND PROCESS FOR PRODUCING SINTERED OBJECT OF RARE EARTH ALLOY

Title:

PROCESS AND SYSTEM FOR PRODUCING GRANULATION POWDER OF RARE EARTH ALLOY AND PROCESS FOR PRODUCING SINTERED OBJECT OF RARE EARTH ALLOY

Document Type and Number:

WIPO Patent Application WO/2004/105982

Kind Code:

A1

Abstract:

A process for producing granulation powder comprising a step for providing powder of rare earth alloy having remanent magnetization, a step for feeding the powder to a track (22) defined by a side face (22a) and a bottom face (22b) inclining downward toward the side face, and a step for imparting kinetic energy to the powder by vibrating the track and performing granulation under substantially zero magnetic field utilizing cohesive force caused by remanent magnetization of the powder and rolling action caused by kinetic energy while transporting the powder in the longitudinal direction of the track. Granulation powder of rare earth alloy exhibiting excellent fluidity and press moldability and capable of producing a magnet having excellent magnetic characteristics can thereby be obtained.

Inventors:

NAKAMURA AKIRA (JP)
NAKASHIMA SUMIHITO (JP)
OTANI TOMOIKU (JP)

Application Number:

PCT/JP2004/007586

Publication Date:

December 09, 2004

Filing Date:

May 26, 2004

Export Citation:

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Assignee:

NEOMAX CO LTD (JP)
NAKAMURA AKIRA (JP)
NAKASHIMA SUMIHITO (JP)
OTANI TOMOIKU (JP)

International Classes:

B22F9/04; H01F1/053; H01F41/02; H01F1/057; (IPC1-7): B22F3/02

Foreign References:

JPH01114005A	1989-05-02
JPH06262055A	1994-09-20
JPS4022649B1
US5116434A	1992-05-26
JP2001362436A
JP2002298621A	2002-10-11

Other References: