The Effect of Nano-TiC Addition on Sintered Nd-Fe-B Permanent Magnets

Zorjana Mural, Lauri Kollo, Manlong Xia, Christian Bahl, Asger Bech Abrahamsen, Henrique Neves Bez, Joosep Link, Renno Veinthal

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Abstract

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/m3. The maximum working point and the Curie temperature of the developed magnets were 373 K and 623 K respectively.
Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Volume429
Pages (from-to)23–28
Number of pages11
ISSN0304-8853
DOIs
Publication statusPublished - 2017

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