| Original Articles |
|
|
|
|
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 |
|
| Cite this article: |
|
FANG Yi-Kun, ZHU Ming-Gang, GUO Yong-Quan et al 2004 Chin. Phys. Lett. 21 1655-1658 |
|
|
|
|
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.
|
| Keywords:
81.20.Ev
75.50.Ww
75.60.Ch
07.79.Pk
|
|
|
Published: 01 August 2004
|
|
| PACS: |
81.20.Ev
|
(Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)
|
| |
75.50.Ww
|
(Permanent magnets)
|
| |
75.60.Ch
|
(Domain walls and domain structure)
|
| |
07.79.Pk
|
(Magnetic force microscopes)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
