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.
- exchange interaction
- grain refining
- magnetic properties
Chen, W., Zhao, X., Hu, J. J., Li, A. J., Tian, Y., Tang, G. D., Gao, R. W., Zhu, M. G., Li, X. M., & Li, W. (2006). Refinement of the microstructure and enhancement of the magnetic properties in alpha-Fe/(Nd,DY)(2)Fe14B annealing nanocomposite using the two-step technique. Journal of Magnetism and Magnetic Materials, 306(1), 51-54. https://doi.org/10.1016/j.jmmm.2006.02.104