Vol.28 No.9 包小倩等：高性能烧结NdFeB磁体的制备技术 ·853。 Solids,.2001,287:140 magnets.J Alloys Compd,1996.239:50 [5]Pei W L.He C S,Lian F Z,et al.Structures and magnetic [9 Morimoto K.Kato K.Igarashi K.et al.Magretic properties properties of sintered Nd-Fe-B magnets pmoduced by strip of anisotropic Nd-Fe-B HDDR powders prepared fwom strip casting technique.J Magn Magn Mater.2002.239.475 east alloys.J Alloys Compd.2004.366:274 [6]Meguines P J.Ahmed A,Jones D G.et al.The hydrogen 10]Sagaw a M.Nagata H.Novd processing technology for per decrepitation behavior of alloys and magnets based on marence magnets.IEEE Trans Magn.1993.29:2747 Nd16FeBs.J Appl Phys.1990,67(9):4626 【I山李青华，包小倩，高学绪，等.NF一B磁体热等静压烧结 [7]Stiller C.Roth S.Binner A.Hydrogen decrepitation of sin- 的实验研究.北京科技大学学报，2004,26(3)：282 tered NdFeB magnets.IEEE Trans Mag,1994.30(2):672 【1周寿增，唐伟忠，王润。烧结N十F一B永磁合金的边界显 [8]Yartys VA,Williams A J,Knoch K G.et al.Further studes 微结构与磁硬化.金属学报.1990.26(4)：290 of anistmopic hydrogen decrepitation in NdisFesB sintered Improved processing techniques for high performance NdFeB magnets BAO Xiaogian,LI Qinghua,ZHU Xuex in2,LI Chengdong?,ZHU Jie,ZHANG Maocai, ZHOU Shouzeng) 1)State Key Laboratory for Advanced M etals and Materials,University of Science and Technology Beijing.Beijing 100083.China 2)Beijing General Research Institute for Nonfermus Metal,Beijing 100088.China ABSTRACT A high perform ance sintered NdFeB magnet with N52 w as prepared by strip casting,hy dro- gen decrepitation,jet milling,rubber isostatic pressing with impulse magnetic field and vibrating.The structure of the magnet was investigated by XRD,optical microscope,TEM and SEM,and its demagneti- zation curve w as tested by magnetograph.The results show that the room-temperature magnetic properties of the Nd29.oPm.5Gao 2 Fe69.1Nbo.2 B1.o magnet can reach up to B=1.457 T,H=1 097 kA'm and (BH)m=409kJ'm,with a better homogeneity and consistency. KEY WORDS sintered NdFeB magnets;strip casting;hydrogen decrepitation;rubber isostatic pressingSolids, 2001, 287:140 [ 5] Pei W L, He C S , Lian F Z, et al.Structures and magnetic properties of sintered Nd-Fe -B magnets produced by strip casting technique .J Magn Magn Mater, 2002, 239:475 [ 6] Mcguiness P J, Ahmed A, Jones D G, et al.T he hydrogen decrepitation behavior of alloys and magnets based on Nd16Fe76B8 .J Appl Phys, 1990, 67( 9) :4626 [ 7] S tiller C , Roth S, Binner A .Hydrogen decrepitation of sin￾t ered NdFeB magnets.IEEE Trans Magn, 1994, 30( 2) :672 [ 8] Yart ys V A, Williams A J, Knoch K G, et al.Further studies of anistropic hydrogen decrepit ation in Nd16 Fe76 B8 sintered magnets.J Alloys Compd, 1996, 239:50 [ 9] Morimoto K, Kato K, Igarashi K, et al.Magnetic properties of anisotropic Nd-Fe-B HDDR powders prepared from strip cast alloys.J Alloys Compd, 2004, 366:274 [ 10] Sagaw a M, Nagat a H .Novel processing technology f or per￾manence magnets.IEEE Trans Magn, 1993, 29:2747 [ 11] 李青华, 包小倩, 高学绪, 等.Nd-Fe-B 磁体热等静压烧结 的实验研究.北京科技大学学报, 2004, 26( 3) :282 [ 12] 周寿增, 唐伟忠, 王润.烧结 Nd-Fe-B 永磁合金的边界显 微结构与磁硬化.金属学报, 1990, 26( 4) :290 Improved processing techniques fo r high performance NdFeB magnets B AO Xiaoqian 1) , LI Qinghua 1) , ZHU X uex in 2) , LI Chengdong 2) , ZHU J ie 1) , ZHANG Maocai 1) , ZHOU Shouzeng 1) 1) St at e Key Laborat ory for Advanced M etals and Materials, University of S cience and Technology Beijing, Beijing 100083, China 2) Beijing General Research Institut e for Nonferrous Metals, Beijing 100088, C hina ABSTRACT A high performance sintered NdFeB magnet with N52 w as prepared by strip casting , hy dro￾gen decrepitation, jet milling, rubber isostatic pressing with impulse magnetic field and vibrating .The structure of the mag net w as investigated by XRD, optical microscope, TEM and SEM , and its demag neti￾zation curve w as tested by magnetog raph .The results show that the room-temperature magnetic properties of the Nd29.0 Pr0.5Ga0.2 Fe69.1Nb0.2B1.0 magnet can reach up to B r =1.457 T, Hci =1 097 kA·m -1 and ( BH) m =409 kJ·m -3 , w ith a better homogeneity and consistency . KEY WORDS sintered NdFeB mag nets ;strip casting ;hydrogen decrepitation ;rubber isostatic pressing Vol.28 No.9 包小倩等:高性能烧结 NdFeB 磁体的制备技术 · 853 ·