| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1797788 | Journal of Magnetism and Magnetic Materials | 2016 | 5 Pages |
•Novel ‘Flash Spark Plasma Sintering’ technique was applied to melt-spun Nd–Fe–B.•Extremely rapid deformation (<3.6 s−1) and heating (2660 K min−1) observed.•Anisotropic, nanostructured, high coercivity (1600 kA m−1) material produced.•‘FSPS’ is a promising technique for efficient production of anisotropic Nd–Fe–B.
A Spark Plasma Sintering (SPS) furnace was used to Flash-Sinter (FS) Nd–Fe–Dy–Co–B–Ga melt spun permanent magnetic material. During the 10 s “Flash” process (heating rate 2660 K min−1), sample sintering (to theoretical density) and deformation (54% height reduction) occurred. This produced texturing and significant magnetic anisotropy, comparable to conventional die-upset magnets; yet with much greater coercivities (>1600 kA m−1) due to the nanoscale characteristics of the plate-like sintered grains. These preliminary results suggest that Flash-SPS could provide a new processing route for the mass production of highly anisotropic, nanocrystalline magnetic materials with high coercivity.
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