Nanocompositional Electron Microscopic Analysis and Role of Grain Boundary Phase of Isotropically Oriented Nd-Fe-B Magnets
EELS line scans across GBs showing the asymmetric change of composition depending on the relative orientation of the GBs with respect to the neighbouring hard magnetic grains. (a) EELS-1 transition between and orientation (--GB). (b) EELS-2 line scan across the asymmetric --GB (from to ) and (c) EELS-3 line scan across --GB (from to ). The change in the chemical composition from the 2-14-1 grain into the GB is steeper in the -GB compared to -GB in (a); in the -GB compared to the -GB in (b); and in the -GB compared with the -GB in (c).