Block Magnets with Uniform Core-Shell Microstructure Regenerated from NdFeB Grain Boundary Diffusion Sheet Magnets.

ABSTRACT: The grain boundary diffusion (GBD) process is currently the relatively effective method for utilizing heavy rare earth (HRE) elements in NdFeB magnets, especially for magnetic sheets. However, due to a highly uneven microstructure, the recovery of GBD magnets was considered difficult. In this work, our study prioritized short-loop recycling of GBD NdFeB sheet magnets to prepare block magnets. A comparative investigation was conducted between GBD-processed NdFeB magnets and the conventional sintered magnets, with particular emphasis on their recyclability characteristics. Among them, the Tb content of GBD magnets of 0.4 wt.% was significantly lower than sintered magnets of 1.73 wt.%. When two waste magnets were supplemented with the same amount of rare earth, it was found that the coercivit

SUBMITTER: Zhuge X 

PROVIDER: S-EPMC12472906 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature