Magnetic Microstructure of Sintered Nd-Fe-B Magnets Made from Casting Strips
FANG Yi-Kun1, ZHU Ming-Gang2, GUO Yong-Quan2, LI Wei2, HAN Bao-Shan1
1State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Division of Functional Materials, Central Iron & Steel Research Institute, Beijing 100081
Magnetic Microstructure of Sintered Nd-Fe-B Magnets Made from Casting Strips
1State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Division of Functional Materials, Central Iron & Steel Research Institute, Beijing 100081
Abstract：The magnetic microstructures of two Dy-Al substituted sintered Nd-Fe-B magnets with the different nominal compositions of Nd12.2Dy0.6Fe80.4Al0.7B6(at.%) (composition-A, C-A) and Nd13.7Dy0.6Fe78.8Al0.7B6.2(at.%) (composition-B, C-B) prepared by strip casting technique have been revealed by using a magnetic force microscope. The magnetic properties of sintered C-B magnets are worse than that of C-A sintered magnets. In particular, the value of density products (BH)max for sintered C-A magnets is about 32% higher than that of C-B magnets, which is reflected by their quite different magnetic microstructures. We believe that for the C-B samples, the inappropriate composition and thus the redundant Nd2Fe17(B) phase of the casting strips make its final magnetic microstructures worse than the C-A, and then deteriorates the performance of the C-B magnets.
FANG Yi-Kun; ZHU Ming-Gang;GUO Yong-Quan;LI Wei;HAN Bao-Shan. Magnetic Microstructure of Sintered Nd-Fe-B Magnets Made from Casting Strips[J]. 中国物理快报, 2004, 21(8): 1655-1658.
FANG Yi-Kun, ZHU Ming-Gang, GUO Yong-Quan, LI Wei, HAN Bao-Shan. Magnetic Microstructure of Sintered Nd-Fe-B Magnets Made from Casting Strips. Chin. Phys. Lett., 2004, 21(8): 1655-1658.
2004, Vol. 21 
