Effect of multiple alloying elements (Ga, Nb, Zr, Hf and Pr) on microstructure and magnetic properties of nanocomposite Nd9-xPrxFe86.5-y-z-m-nGayNbzZrmHfnB4.5 (x=0, 2.25; y, z, m, n=0.5, 1.0) ribbons was investigated by a L16(215) orthogonal experiment. The results show that the addition of multiple alloying elements can effectively reduce the grain size of Nd2Fe14B and α-Fe phases and promote amorphous phase to occur at low wheel speed. No inhomogeneous growth of grains was found in annealed ribbons, but a large amount of additives would results in irregularity of Nd2Fe14B and α-Fe grains. On the other hand, addition of multiple alloying elements has complex effects on magnetic properties due to interactions between alloying elements. When the content of Nb is 0.5%, increasing the content of Pr and Ga and decreasing the content of Zr and Hf can improve the magnetic properties effectively. The optimum magnetic properties were obtained in Nd2.25Pr6.75Fe84.5Ga1.5Nb0.5B4.5 ribbons spun at 15 m*s-1 with Jr=1.053 T, iHc=530.9 kA*m-1,(BH)max＝124 kJ*m-3.
参考文献
| [1] | Stoner E C;Wohlfarth E P .A mechanism of magnetic hysteresis in heterogeneous alloys[J].Philosophical Transactions of the Royal Society,1948,240:599. |
| [2] | Skomski R;Coey J M D .Giant energy product in nanostructure two-phase magnets[J].Physical Review B,1993,48(21):15812. |
| [3] | Bauer J.;Zern A.;Kronmuller H.;Seeger M. .NANOCRYSTALLINE FENDB PERMANENT MAGNETS WITH ENHANCED REMANENCE[J].Journal of Applied Physics,1996(3):1667-1673. |
| [4] | Betancourt J I;Davis H A .Magnetic properties of nanocrystalline neodymium (Nd-Pr)-Fe-B alloys[J].Journal of Applied Physics,1999(85):5911. |
| [5] | Wang Z C;Zhang M C;Qiao Y et al.Nanocomposite(NdDy)2(FeNb)14B/α-Fe alloy[J].北京科技大学学报,1997,19(01):75. |
| [6] | Melsheimer A;Seeger M;Kromüller H .Influence of Co substitution in exchange coupled NdFeB nanocrystalline permanent magnets[J].Journal of Magnetism and Magnetic Materials,1999,202:458. |
| [7] | Chen Zhongmin;Zhang Yong;Hadjipanayis G C et al.Exchange coupled R2(Fe,Co,Nb)14B/(Fe,Co) (R=Nd,Pr) and Sm2(Fe,Co,Cr)17C2/(Fe,Co) nanocomposite magnets[J].Journal of Alloys and Compounds,1999,287:227. |
| [8] | Inoue A;Kojima A;Takeuchi A et al.Hard and soft magnetic properties of nanocrystalline Fe-Nd-Zr-B alloys containing intergranular amorphous phase[J].Journal of Applied Physics,1996,79:4836. |
| [9] | Yang Choongjin;Eon Byung Park .Effect of magnetic field treatment on enhanced exchange coupling of Nd2Fe14B/Fe3B magnet[J].IEEE Transactions on Magnetics,1996,32:4428. |
| [10] | Chang WC.;Ma BM.;Bounds CO.;Wu SH. .THE EFFECTS OF LA-SUBSTITUTION ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF NANOCOMPOSITE NDFEB MELT SPUN RIBBONS[J].Journal of Magnetism and Magnetic Materials,1997(1/2):65-70. |
| [11] | Ahmad I;Al-Khafaji M A;Davis H A et al.Microstructure study of high coercivity Ga containing Nd-Fe-B permanent magnets[J].Journal of Magnetism and Magnetic Materials,1995,145:19. |
| [12] | Yao J M;Chin T S;Chen S K .Coercivity of Ti-modified (α-Fe)-Nd2Fe14B nanocrystalline alloys[J].Journal of Applied Physics,1994(76):7071. |
| [13] | Hadjipanayis G C .Nanophase hard magnets[J].Journal of Magnetism and Magnetic Materials,1999,200:373. |
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