Abstract
The Nd8-xDyxFe87.5B4.5 (x = 0- 1.0) nanocomposites have been prepared by melt spinning and subsequent two-step heat treatment technique. The crystallization behaviors, microstructures and magnetic properties of the samples have been investigated. The experimental results show that the crystallization temperature of alpha-Fe soft phase has no obvious change through Dy addition while the crystallization temperature of 2:14:1 hard phase increases remarkably with increasing Dy content. By adopting a two-step heat treatment technique, a finer and more uniform microstructure can be developed. A dramatic enhancement of remanence J(r) from 0.84 to 1.1 T, coercivity H-cj from 417 to 520 kA/m and energy product (BH)(m) from 76.8 to 110 kJ/m(3) have been obtained in Nd7Dy1Fe87.5B4.5 (30 vol%alpha-Fe) nanocomposite.
| Original language | English |
|---|---|
| Journal | Journal of Magnetism and Magnetic Materials |
| Volume | 306 |
| Issue number | 1 |
| Pages (from-to) | 51-54 |
| ISSN | 0304-8853 |
| DOIs | |
| Publication status | Published - 2006 |
Keywords
- exchange interaction
- grain refining
- magnetic properties
- nanocomposite
- annealing
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