Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1500545 | Scripta Materialia | 2010 | 4 Pages |
Abstract
We report the coercivity enhancement of hydrogenation–disproportionation–desorption–recombination processed Nd–Fe–B nanocrystalline powders from 1321 to 1552 kA m−1 (19.5 kOe) by the grain boundary diffusion of Nd–Cu melts with hyper-eutectic compositions. A distinct Nd-rich grain boundary phase was observed after the diffusion process by scanning electron microscopy and transmission electron microscopy; however, atom probe tomography indicated that the change in composition of the grain boundary phase was not significant. The mechanism of the coercivity enhancement is discussed based on these results.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
H. Sepehri-Amin, T. Ohkubo, T. Nishiuchi, S. Hirosawa, K. Hono,