Abstract
A new rapid solidification processing technique, liquid dynamic compaction (LDC), has been used to make bulk permanent magnets of composition Fe57 Co20 Nd15 B8. In this process, molten metal is spray atomized onto a cooled substrate in a protective atmosphere. Oxidation is minimal. Subsequent heat treatment at 450 °C of the LDC’d material has resulted in isotropic permanent magnets with intrinsic coercivity and remanance approaching 8000 Oe and 6000 G, respectively.
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