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Title:
MAGNETIC POWDER CONTAINING SM-FE-N CRYSTAL GRAINS, SINTERED MAGNET PRODUCED FROM SAME, METHOD FOR PRODUCING SAID MAGNETIC POWDER, AND METHOD FOR PRODUCING SAID SINTERED MAGNET
Document Type and Number:
WIPO Patent Application WO/2018/163967
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a sintered magnet which contains Sm-Fe-N crystal grains and has high coercivity; and a magnetic powder which is capable of forming a sintered magnet without lowering the coercivity even if heat is generated in association with the sintering. A sintered magnet which comprises a crystal phase that is composed of a plurality of Sm-Fe-N crystal grains and non-magnetic metal phases that are present between adjacent Sm-Fe-N crystal grains, and wherein the ratio of the Fe peak intensity IFe to the SmFeN peak intensity ISmFeN as determined by an X-ray diffraction method is 0.2 or less. A magnetic powder which contains Sm-Fe-N crystal grains and non-magnetic metal layers that cover the surfaces of the Sm-Fe-N crystal grains.

Inventors:
TAKAGI KENTA (JP)
YAMAGUCHI WATARU (JP)
YOKOYAMA TAKAAKI (JP)
SAKAGUCHI KENJI (JP)
YOSHII KAZUHIRO (JP)
YOKOYAMA YUJI (JP)
Application Number:
PCT/JP2018/007849
Publication Date:
September 13, 2018
Filing Date:
March 01, 2018
Export Citation:
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Assignee:
AIST (JP)
MURATA MANUFACTURING CO (JP)
International Classes:
H01F1/059; B22F1/05; B22F1/17; B22F3/00; B22F3/14; B22F9/04; C22C33/02; H01F41/02; C22C38/00
Domestic Patent References:
WO2015199096A12015-12-30
Foreign References:
JP2005171264A2005-06-30
JP2000286115A2000-10-13
JPH04360501A1992-12-14
JP2015142119A2015-08-03
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
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