| Autor: |
Ding, Y., Chen, R. J., Liu, Z., Lee, D., Yan, A. R. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; May2010, Vol. 107 Issue 9, p09A726-1-09A726-3, 3p |
| Abstrakt: |
A new coercivity enhancement process using dysprosium diffusion in grain boundaries of rapidly solidified strips was developed. The effects of the dysprosium diffusion on microstructure and magnetic properties of sintered Nd14.4Fe78.4Co1.3B5.9 magnets have been investigated. The transmission electron microscope observation showed that the intergranular phases of rapidly solidified strips were optimized through the grain boundary diffusion process of strips. From the mapping distribution of dysprosium atoms in sintered magnets and the fact that remanence almost kept constant, one could suppose that dysprosium element preferred the interface of the matrix grains, which was probably a reason of coercivity enhancement. The coercivity of the magnets made from diffusion heat treatment strips was increased by 1100 Oe, while the remanence was almost kept constant. Reduction in remanence is from 14.1 to 13.92 kG. The energy product of the magnets was slightly increased from 46.4 to 47.4 MGOe. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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