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@ARTICLE{Titov:865912,
author = {Titov, Ivan and Barbieri, Massimiliano and Bender, Philipp
and Peral, Inma and Kohlbrecher, Joachim and Saito, Kotaro
and Pipich, Vitaliy and Yano, Masao and Michels, Andreas},
title = {{E}ffect of grain-boundary diffusion process on the
geometry of the grain microstructure of {N}d − {F}e −
{B} nanocrystalline magnets},
journal = {Physical review materials},
volume = {3},
number = {8},
issn = {2475-9953},
address = {College Park, MD},
publisher = {APS},
reportid = {FZJ-2019-05189},
pages = {084410},
year = {2019},
abstract = {Hot-deformed anisotropic Nd−Fe−B nanocrystalline
magnets have been subjected to the grain-boundary diffusion
process (GBDP) using a Pr70Cu30 eutectic alloy. The
resulting grain microstructure, consisting of
shape-anisotropic Nd−Fe−B nanocrystals surrounded by a
Pr−Cu-rich intergranular grain-boundary phase, has been
investigated using unpolarized small-angle neutron
scattering and very small-angle neutron scattering. The
neutron data have been analyzed using the generalized
Guinier-Porod model and by computing, model independently,
the distance distribution function. We find that the GBDP
results in a change of the geometry of the scattering
particles: In the small-q regime, the scattering from the
as-prepared sample exhibits a slope of about 2, which is
characteristic for the scattering from two-dimensional
platelet-shaped objects, while the GBDP sample manifests a
slope of about 1, which is the scattering signature of
one-dimensional elongated objects. The evolution of the
Porod exponent indicates the smoothing of the grain surfaces
due to the GBDP, which is accompanied by an increase of the
coercivity.},
cin = {JCNS-FRM-II / JCNS-1},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)KWS3-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000480695600004},
doi = {10.1103/PhysRevMaterials.3.084410},
url = {https://juser.fz-juelich.de/record/865912},
}