Coercivity Mechanism of Melt-spun Nd-Fe-B Bonded Magnet

Abstract

Abstract: The microstructures of melt-spun Nd_135- Fe_81.74B4.76 ribbons have been investigated by means of X-ray diffraction,Mossbauer spectroscopy and HREM.Experimental results show that optimal magnetic properties of the bond- ed magnet can be obtained by melt-spun alloys at wheel velocity of 24m/s,the microstructure of which was single phase Nd_2Fe_(14)B crystallites,and no other phases,such as Nd-rich,B-rich or x-Fe phase,were present.It is considered that the high intrinsic coercivity ~iH_c can be attributed to the sin- gle-domain behaviour of Nd_2Fe_(14)B crystallite phase.

Key words: coercivity, Nd-Fe-B magnet

HUANG Gangxiang XU Qingzhen GAO Huimin YU Shanfu HUA Hongci WANG Geya Shanghai Iron and Steel Research Institute,Shanghai,200940,China.Shanghai Institute of Metallurgy,Academia Sinica,Shanghai,200050,China.. Coercivity Mechanism of Melt-spun Nd-Fe-B Bonded Magnet[J]. J Mater Sci Technol, 1990, 6(4): 272-276.

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Coercivity Mechanism of Melt-spun Nd-Fe-B Bonded Magnet

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