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@ARTICLE{PrasadMishra:910106,
author = {Prasad Mishra, Tarini and Leich, Lennart and Krengel,
Martin and Weber, Sebastian and Röttger, Arne and Bram,
Martin},
title = {{N}d{F}e{B} {M}agnets with {W}ell‐{P}ronounced
{A}nisotropic {M}agnetic {P}roperties {M}ade by {E}lectric
{C}urrent‐{A}ssisted {S}intering},
journal = {Advanced engineering materials},
volume = {25},
number = {1},
issn = {1438-1656},
address = {Frankfurt, M.},
publisher = {Deutsche Gesellschaft für Materialkunde},
reportid = {FZJ-2022-03614},
pages = {2201027},
year = {2023},
abstract = {Electric current-assisted sintering (ECAS) technologies are
highly promising for processing of NdFeB magnets. Due to the
combination of direct Joule heating and application of
external load, even powders, whose particle size
distribution and morphology are not optimum for conventional
powder processing like melt-spun powders or magnet scrap,
can be easily sintered to high densities. A systematic study
is done to demonstrate the potential of field-assisted
sintering technique/spark plasma sintering (FAST/SPS) and
flash spark plasma sintering (flash SPS) for sintering of
NdFeB powders. Melt-spun, commercial NdFeB powder
(Magnequench MQU-F) is used as starting material. Its
platelet-like shape makes this powder extremely difficult to
sinter by conventional methods. This study clearly reveals
that especially in the case of flash SPS application of
external pressure in combination with short cycle times
enables to achieve well-pronounced anisotropic magnetic
properties without the need of subsequent upset forging.
Optimized flash SPS parameters are applied to NdFeB magnet
scrap with broad particle size distribution, demonstrating
the general potential of ECAS technologies for recycling of
waste magnet materials. Finally, the results are benchmarked
with respect to established NdFeB processing technologies
and electrodischarge sintering (EDS), another promising ECAS
technology with very short cycling time.},
cin = {IEK-1},
ddc = {660},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000864408400001},
doi = {10.1002/adem.202201027},
url = {https://juser.fz-juelich.de/record/910106},
}