Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5490735 | Journal of Magnetism and Magnetic Materials | 2017 | 17 Pages |
Abstract
In this study, we investigated the effect of strain on the microstructure and magnetic properties of bulk α-Fe/Nd2Fe14B nanocomposite magnets produced by a combination of severe plastic deformation at room temperature and subsequent thermal annealing. Experiment results indicate that severe plastic deformation can induce the formation of α-Fe and Nd2Fe14B nanocrystals in the amorphous matrix and then suppress the formation of metastable intermediate phases during thermal annealing. The volume fraction of α-Fe phase in the magnets increases as the strain increasesï¼and the grain size of α-Fe and Nd2Fe14B phases significantly decreases. As a result, the bulk magnets made at ε=6.2 show enhanced magnetic properties, (BH)max=17.8 MGOe and Hc=7.2 kOe, compared with that of directly annealed partially amorphous (Nd-Pr)-Fe-Co-Nb-B, (BH)max=12.2 MGOe and Hc=6.2 kOe.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Hailing Li, Wei Li, Defeng Guo, Xiangyi Zhang,