Amorphous melt-spun ribbons of an Nd/sub 4/Fe/sub 77.5/B/sub 18.5/ alloy were consolidated into bulk materials by shock compaction. The resultant bulk materials showed a low coercivity as expected for amorphous Nd-Fe-B materials. Heat treatment of the bulk materials above the crystallization temperature resulted in the formation of metastable Fe/sub 3/B phase together with Nd/sub 2/Fe/sub 14/B phase. The resultant bulk magnets showed a coercivity as high as 2.7 kOe as was the case for the annealed melt-spun ribbons.
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Testuji Saito (2001) studied this question.
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