Strategic coating of NdFeB magnets with Dy to improve the coercivity of permanent magnets [electronic resource]
Here, we present a method, supported by theoretical analysis, for optimizing the usage of the critical rare earth element dysprosium in Nd<sub>2</sub>Fe<sub>14</sub>B (NdFeB)-based permanent magnets. In this method, we use Dy selectively in locations such as magnet edges and...
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| Format: | Government Document Electronic eBook |
| Language: | English |
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Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. Office of Energy Efficiency and Renewable Energy ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2015.
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| Subjects: |
MARC
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| 245 | 0 | 0 | |a Strategic coating of NdFeB magnets with Dy to improve the coercivity of permanent magnets |h [electronic resource] |
| 260 | |a Washington, D.C. : |b United States. Department of Energy. Office of Energy Efficiency and Renewable Energy ; |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy, |c 2015. | ||
| 300 | |a p. 227-233 : |b digital, PDF file. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a computer |b c |2 rdamedia. | ||
| 338 | |a online resource |b cr |2 rdacarrier. | ||
| 500 | |a Published through SciTech Connect. | ||
| 500 | |a 12/25/2015. | ||
| 500 | |a Advances in Materials Research 4 4 ISSN 2234-0912 AM. | ||
| 500 | |a Huseyin Ucar; David S. Parker; I. C. Nlebedim; R. W. McCallum; S. K. McCall; M. Parans Paranthaman. | ||
| 520 | 3 | |a Here, we present a method, supported by theoretical analysis, for optimizing the usage of the critical rare earth element dysprosium in Nd<sub>2</sub>Fe<sub>14</sub>B (NdFeB)-based permanent magnets. In this method, we use Dy selectively in locations such as magnet edges and faces, where demagnetization factors are most significant, rather than uniformly throughout the bulk sample. A 200 nm thick Dy film was sputtered onto commercial N-38, NdFeB magnets with a thickness of 3 mm and post-annealed at temperatures from 600 - 700 C. Magnets displayed enhanced coercivities after post-annealing. Furthermore, our experimental results indicate as large as a 5 percent increase in the energy product of NdFeB magnets, achieved for a total Dy weight percentage of 0.06 percent, much less than that used in commercial grade Dy-NdFeB magnets. Finally, by assuming all Dy diffused into NdFeB magnets, the improvement in energy product corresponds to a saving of over 1% Dy (critical element). Magnets manufactured using this technique will therefore be higher performing and significantly less expensive than those made presently. | |
| 520 | 0 | |a Ndfeb Magnets; Sputter Deposition; Selective Dy Diffusion; Magnetic Properties; Theoretical Analysis. | |
| 536 | |b AC05-00OR22725. | ||
| 536 | |b AC52-07NA27344. | ||
| 650 | 7 | |a Materials Science. |2 edbsc. | |
| 710 | 2 | |a Oak Ridge National Laboratory. |4 res. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Energy Efficiency and Renewable Energy. |4 spn. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
| 856 | 4 | 0 | |u http://www.osti.gov/scitech/biblio/1286953 |z Online Access (via OSTI) |
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| 952 | f | f | |p Can circulate |a University of Colorado Boulder |b Online |c Online |d Online |e E 1.99:1286953 |h Superintendent of Documents classification |i web |n 1 |