Abstract
Rapidly solidified bulk Nd 15Fe 77B 8 magnets were produced by liquid dynamic compaction (LDC), a rapid solidification, spray deposition technique. Results of transmission electron microscopic studies showed that in magnets produced at low atomization gas pressures, the Nd 2Fe 14B phase had an oriented dendritic structure, and that magnets produced at high atomization gas pressures had an amorphous structure. Heat treatment of the amorphous structure resulted in the precipitation of fine Nd 2Fe 14B crystallites and a very large increase in coercivity to i H c = 14.8 kOe.
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