Gast ::
| Hauptseite > Publikationsdatenbank > Effect of grain-boundary diffusion process on the geometry of the grain microstructure of Nd − Fe − B nanocrystalline magnets |
| Hauptseite > Publikationsdatenbank > Effect of grain-boundary diffusion process on the geometry of the grain microstructure of Nd − Fe − B nanocrystalline magnets |
| Journal Article | FZJ-2019-05189 |
; ; ; ; ; ; ; ;
2019
APS
College Park, MD
This record in other databases: 
Please use a persistent id in citations: http://hdl.handle.net/2128/23220 doi:10.1103/PhysRevMaterials.3.084410
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.
Keyword(s): Magnetic Materials (1st) ; Magnetism (2nd)
; 
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Science Citation Index Expanded ; Web of Science Core Collection
|
The record appears in these collections: |
PDF
PDF (PDFA)