Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 426, Issue -, Pages 70-73Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2016.11.067
Keywords
Mischmetal; Permanent magnets; Phase constitution; Magnetic properties
Funding
- National Basic Research Program of China [2014CB643702]
- National Natural Science Foundation of China [51461033, 51590880]
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Magnetic materials of MM-Fe-B (MM=mischmetal) ribbons were prepared using melt spinning method by varying the content of MM. The ribbons contain minor phases besides the main phase of Re2Fe14B. X-ray techniques show that the diffraction peak intensities of the minor phase Fe3B vary with the content of constituent elements, indicating that the amount of minor phase could be tunable. The squareness of hysteresis loop is the best in MM13Fe80.5B6.5 ribbons, which should mainly ascribe to the less amount of minor phase. Henkel plots verify the more uniform magnetization reversals in MM13Fe80.5B6.5 ribbons, and the energy product achieves to the maximum of 12.74 MGOe with the coercivity of 6.50 kOe. With the increase of MM content the coercivity increases monotonically, and reaches to 9.13 kOe in MM15Fe77.5B7.5 ribbons, which should be related with the nature of the defects in the main phase. These investigations show that optimizing the content of constituent elements and phase constitution could improve magnetic properties in the resourcesaving magnets of MM-Fe-B ribbons.
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