%0 Conference Paper
%A Bram, Martin
%A Keszler, Monica
%A Grosswendt, Felix
%A Assmann, Anne-Caroline
%A Krengel, Martin
%A Maccari, Fernando
%A Gutfleisch, Oliver
%A Sebold, Doris
%A Guillon, Olivier
%A Weber, Sebastian
%T Utilizing Field Assisted Sintering for the Recycling of Hot-Deformed Nd-Fe-B Scrap
%M FZJ-2024-05886
%D 2024
%X With growing interest in electric vehicles and renewable energy, recycling of Nd-Fe-B magnets will continue to become ongoing challenge for the goal of a circular economy. Due to the microstructure necessary for hot-deformed Nd-Fe-B permanent magnets, state-of-the-art magnet production methods have limitations with regards to the direct recycling of scrap magnet particles with anisotropic microstructure. Recent work has shown that a combination of pre-sintering by Field Assisted Sintering Technology/Spark Plasma Sintering (FAST/SPS) and hot deformation by Flash Spark Plasma Sintering (Flash SPS) has can potentially produce Nd-Fe-B magnets directly from 100% scrap material. A systematic study was done to consolidate a combination of recycled magnet particles and melt-spun powder into a Flash SPS deformed magnet, using a range of weight percentages of scrap material and scrap particle size fractions. In some cases, HcJ of >1400 kAm-1 and Br of 1.1 T could be achieved with 20 wt.% scrap material. The relationship between oxygen uptake, particle size fraction, and percentage of recyclate in a final magnet are all explored and discussed in comparison to magnets produced with pristine material.
%B Materials Science and Engineering
%C 24 Sep 2024 - 26 Sep 2024, Darmstadt (Germany)
Y2 24 Sep 2024 - 26 Sep 2024
M2 Darmstadt, Germany
%F PUB:(DE-HGF)6
%9 Conference Presentation
%U https://juser.fz-juelich.de/record/1031879