Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 429, Issue -, Pages 23-28Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2016.12.115
Keywords
Sintered Nd-Fe-B magnets; Magnetic properties; Thermal stability; TiC
Funding
- project Permanent magnets for sustainable energy application (MagMat) - European Regional (Social) Fund in Estonia [3.2.1101.12-0003]
- Innovation Fund Denmark
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This paper addresses the effect of nano-TiC addition on sintered Nd-Fe-B permanent magnets. TiC nanoparticles were added to sintered Nd-Fe-B magnets with a specific aim to improve the Curie temperature and thermal stability. A standard powder metallurgy route was adopted to prepare the magnets. It was found that introducing nano-TiC prior to jet milling was effective as the nanoparticles dispersed in the final alloy, concentcalcrating in the neodymium-rich phase of the magnets. Magnets with optimal properties were obtained with the addition of 1 wt% TiC nanoparticles. The hysteresis loop for such magnets showed an improved shape and VSM analysis a coercivity value of 1188 kA/m, a remanence value of 0.96 T and a maximum energy product of 132 kJ/m(3). The maximum working point and the Curie temperature of the developed magnets were 373 K and 623 K respectively.
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