Magnetic field alignability of hot-rolled anisotropic Nd-Fe-B-Cu powders : The 5th Joint MMM−Intermag Conference
Mukai, T. ; Inaguma, T. ; Okazaki, Y. ; Sakamoto, H.
[S.l.] : American Institute of Physics (AIP)
Published 1991
[S.l.] : American Institute of Physics (AIP)
Published 1991
| ISSN: |
1089-7550
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
We have investigated alignability of anisotropic Nd-Fe-B powders in a magnetic field when they are resin bonded by compression moulding. A high-energy anisotropic powder of Cu-added Nd-Fe-B alloys, which was fabricated by packed rolling of melt-spun ribbons, is used for the present study. The result is compared with the alignability of conventional 2:17 type Sm-Co powder. For a Nd-Fe-B-Cu powder (iHc = 16 kOe), 90% of the saturated Br value was obtained at an aligning field as low as 2 kOe, whereas for a Sm-Co powder (iHc = 12 kOe), an aligning field of 13 kOe was required to obtain the 90% value. The good alignability of the Nd-Fe-B-Cu powder is attributed to a steep rise in the initial magnetization curve. It benefits radial orientation of the powder in ring magnets, for which limitations of the aligning field exist depending upon the size of the magnet. A maximum energy product of 15 MGOe has been obtained for radially oriented Nd-Fe-B-Cu bonded magnets.
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| Type of Medium: |
Electronic Resource
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| URL: |