Nanocrystalline Nd2Fe14B/α-Fe permanent magnet

ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 12 No. 4 August 2002

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Nanocrystalline Nd₂Fe₁₄B/α-Fe
permanent magnet

NI Jian-sen(倪建森), XU Hui(徐晖)，ZHU Ming-yuan(朱明原),
LI Qiang(李强)，ZHOU Bang-xin(周邦新)，DONG Yuanda(董远达)

(Institute of Materials Science and Engineering, Shanghai University,
Shanghai 200072, China)

Abstract: Nd_8.5Fe₇₅Co₅Cu₁Zr₃Nb₁B_6.5 bonded magnet was prepared by melt-spinning (v_s=18m/s) and subsequent heat treatment (670℃, 4min). Excellent magnetic properties of the bonded magnet were achieved: B_r=0.68T, _iH_c=620.3kA/m, (BH)_max=74kJ/m³. The addition of Cu and Zr elements shows to be advantageous in improving an intrinsic coercivity and squareness of hysteresis loop, as well as energy product. It has a remarkable remanence enhancement and the isotropic saturation remanence ratio M_r/M_s is 0.83.

Key words: Nd-Fe-B；permanent magnet；nanocrystalline；grain size

Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
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