Pulverizing anisotropic rapidly solidified Nd-Fe-B materials for bonded magnets

• M. Doser

  Hitachi Magnetics Corp., Edmore, Michigan 48829

• V. Panchanathan

  G.M. Magnequench, Anderson, Indiana 46013

• R. K. Mishra

  G.M. Research Laboratories, Warren, Michigan 48090

抄録

The high (BH)max potential of Nd-Fe-B materials make them excellent candidates for bonded magnets. We have previously shown that anisotropic bonded magnets can be made from hot deformed rapidly solidified materials. The purpose of this paper is to show how hot deformed materials can be pulverized into desired particle size ranges by using specific hydrogen decrepitation (HD) cycles. Specific temperatures for hydriding and desorbing cycles to achieve desired particle size ranges and magnetic values are given. The data shows that there are optimum times and temperatures to achieve the desired magnetic properties. TEM and SEM photomicrographs of mechanically and HD pulverized materials are shown. TEM studies show that stacking faults generated during HD are relieved after desorption. With proper control of HD and desorption, bonded magnets have been produced having (BH)max values as high as 18.9 MGOe.

収録刊行物

• Journal of Applied Physics

  Journal of Applied Physics 70 (10), 6603-6605, 1991-11-15

  AIP Publishing

キーワード

• General Physics and Astronomy

詳細情報

• CRID: 1363670319168738816
• NII論文ID: 30015846235
• DOI: 10.1063/1.349871
• ISSN: 10897550
• ISSN: 00218979
• Web Site: https://pubs.aip.org/aip/jap/article-pdf/70/10/6603/18647169/6603_1_online.pdf
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