Hot-pressed neodymium-iron-boron magnets

Lee, R. W.
April 1985
Applied Physics Letters;4/15/1985, Vol. 46 Issue 8, p790
Academic Journal
A new method is described which produces fully dense, well-aligned Nd-Fe-B magnets from rapidly quenched ribbons. Full density is achieved by hot pressing at ∼15 kpsi in argon at 700 °C. A second hot press in a larger die cavity to allow deformation transverse to the press direction (die upsetting) introduces a preferred magnetization direction parallel to the press direction. Energy products of 40 MGOe (Br/Hci=13.5 kG/11 kOe) have been generated by this method.


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