The strip casting (SC) technique is employed to fabricate Nd(Fe,Mo)12Nx magnets. The crystallographic structure, intrinsic and permanent magnetic properties, as well as the microstructures of the compound are investigated. There are prominent advantages for the SC Nd-Fe-Mo alloys and their nitrides when compared with the samples prepared by the conventional casting (CC) method: (1) SC technique rebounds to the formation of the compounds crystallizing in a ThMn12-type structure. A single-phased host alloy Nd(Fe,Mo)12 can be directly prepared by strip casting without any isothermal annealing. Accordingly, lower energy cost and less rare earth demand notablely benefit the manufacture processing from a point of economizing. (2) The intrinsic magnetic properties, such as Curie temperature Tc, saturation magnetization Ms and anisotropy field Ha of the SC sample exceed the CC sample due to a phase forming condition with less-Mo-depended. (3) The microstructure studies also demonstrate that the SC compound contains finer grains, better-proportioned phase distribution than the CC compound. Optimized final particles are observed aligned in their easy axis and the energy product of powder sample is up to (BH)max~22 MGOe (176 kJ/m3).
The strip casting (SC) technique is employed to fabricate Nd(Fe,Mo)12Nx magnets. The crystallographic structure, intrinsic and permanent magnetic properties, as well as the microstructures of the compound are investigated. There are prominent advantages for the SC Nd-Fe-Mo alloys and their nitrides when compared with the samples prepared by the conventional casting (CC) method: (1) SC technique rebounds to the formation of the compounds crystallizing in a ThMn12-type structure. A single-phased host alloy Nd(Fe,Mo)12 can be directly prepared by strip casting without any isothermal annealing. Accordingly, lower energy cost and less rare earth demand notablely benefit the manufacture processing from a point of economizing. (2) The intrinsic magnetic properties, such as Curie temperature Tc, saturation magnetization Ms and anisotropy field Ha of the SC sample exceed the CC sample due to a phase forming condition with less-Mo-depended. (3) The microstructure studies also demonstrate that the SC compound contains finer grains, better-proportioned phase distribution than the CC compound. Optimized final particles are observed aligned in their easy axis and the energy product of powder sample is up to (BH)max~22 MGOe (176 kJ/m3).
LIU Shun-Quan;HAN Jing-Zhi;WANG Chang-Sheng;YANG Jin-Bo;DU Hong-Lin;YANG Ying-Chang. Structural and Magnetic Properties of Nd(Fe,Mo)12Nx Compounds Produced by Strip-Casting Method[J]. 中国物理快报, 2010, 27(9): 97505-097505.
LIU Shun-Quan, HAN Jing-Zhi, WANG Chang-Sheng, YANG Jin-Bo, DU Hong-Lin, YANG Ying-Chang. Structural and Magnetic Properties of Nd(Fe,Mo)12Nx Compounds Produced by Strip-Casting Method. Chin. Phys. Lett., 2010, 27(9): 97505-097505.
[1] Yang Y C, Zhang X D, Kong L S, Pan Q and Ge S L 1991 Appl. Phys. Lett. 58 2042 [2] Yang Y C, Liu Z X, Zhang X D, Cheng B P and Ge S L 1994 J. Appl. Phys. 76 1745 [3] Gong W and Hadjipanayis G C 1992 IEEE Trans. Magn. 28 2563 [4] Endoh M, Nakamura K and Mikami H 1992 IEEE Trans. Magn. 28 2560 [5] Han J Z, Liu S Q, Wang C S, Du H L, Yang J B and Yang Y C 2006 J. Appl. Phys. 99 08B517 [6] Bernardi J, Fidler J, Sagawa M, and Hirose Y 1998 J. Appl. Phys. 83 6396 [7] Pei W L, He C S, Lian F Z, Zhou G Q and Yang H C 2002 J. Magn. Magn. Mater. 239 475 [8] Wang Y Z, Hu B P, Rao X L, and Liu G C 1993 J. Appl. Phys. 73 6251 [9] Zhang X D, Cheng B P and Yang Y C 2000 Appl. Phys. Lett. 77 4022 [10] Yellon W B and Hadjipanayis G C 1992 IEEE Trans. Magn. 28 2316
2010, Vol. 27 
