Back to Search
Start Over
Tuning the microstructure and magnetic properties of bulk nanocomposite magnets with large strain deformation.
- Source :
-
Journal of Magnetism & Magnetic Materials . Mar2017, Vol. 425, p84-89. 6p. - Publication Year :
- 2017
-
Abstract
- In this study, we investigated the effect of strain on the microstructure and magnetic properties of bulk α-Fe/Nd 2 Fe 14 B 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 Nd 2 Fe 14 B 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 increases,and the grain size of α-Fe and Nd 2 Fe 14 B phases significantly decreases. As a result, the bulk magnets made at ε =6.2 show enhanced magnetic properties, ( BH ) max =17.8 MGOe and H c =7.2 kOe, compared with that of directly annealed partially amorphous (Nd-Pr)-Fe-Co-Nb-B, ( BH ) max =12.2 MGOe and H c =6.2 kOe. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03048853
- Volume :
- 425
- Database :
- Academic Search Index
- Journal :
- Journal of Magnetism & Magnetic Materials
- Publication Type :
- Academic Journal
- Accession number :
- 119775939
- Full Text :
- https://doi.org/10.1016/j.jmmm.2016.10.126