DocumentCode
1193644
Title
Production of bulk nanocomposite magnets of an Nd4Fe77.5B18.5 alloy by compression shearing method
Author
Saito, Tetsuji ; Takeishi, Hiroyuku ; Nakayama, Noboru
Volume
41
Issue
10
fYear
2005
Firstpage
3781
Lastpage
3783
Abstract
Amorphous melt-spun ribbons of an Nd4Fe77.5B18.5 alloy were successfully transformed into bulk material by a compression shearing method. The resultant bulk material showed a low coercivity, as would be expected for an amorphous Nd-Fe-B material. Heat treatment of the amorphous bulk material above the crystallization temperature resulted in the formation of a metastable Fe3B phase together with an Nd2Fe14B phase. The resultant nanocomposite magnets exhibited a coercivity as high as 2.4 kOe, as was the case for the annealed melt-spun ribbon. It was found that such a bulk nanocomposite magnet with a high coercivity could be directly produced from annealed melt-spun ribbon by the compression shearing method.
Keywords
amorphous magnetic materials; ferromagnetic materials; magnetic annealing; melt spinning; nanocomposites; Nd4Fe77.5B18.5; amorphous bulk material; amorphous material; amorphous melt-spun ribbons; annealing; bulk nanocomposite magnets; coercivity; compression shearing method; crystallization temperature; heat treatment; Amorphous magnetic materials; Amorphous materials; Coercive force; Crystalline materials; Iron; Magnetic materials; Magnets; Neodymium; Production; Shearing; Amorphous alloys; Nd–Fe–B alloys; compression shearing method; permanent magnets;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.2005.854695
Filename
1519443
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