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Effects of Nb addition on structural and magnetic properties of Fe-B/Nd2Fe14B-based nanocomposite magnets

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3 Author(s)
T. Miyoshi ; Res. & Dev. Div., Neomax Co. Ltd, Osaka, Japan ; H. Kanekiyo ; S. Hirosawa

Effects of Nb addition on Ti-doped Nd-poor and B-rich composition are investigated. It is found that Nb addition improves the glass-forming ability of rapidly solidified Nd-Fe-B-Ti-based alloys, resulting in significant improvements of magnetic properties in a low cooling-rate regime. Moreover, magnetic properties of the alloys prepared by various surface speeds of Cu wheel, Vs, were almost constant at an excellent level. As a result of transmission electron microscope observation, microstructure was relatively identical and fine regardless of Vs. Therefore, Nb addition is effective to obtain the high performance of magnetic properties within a wide range of cooling rates.

Published in:

IEEE Transactions on Magnetics  (Volume:41 ,  Issue: 10 )