| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1498866 | Scripta Materialia | 2013 | 4 Pages |
Abstract
A high coercivity of 2.6 T is achieved in melt-spun Nd–Fe–B isotropic magnet powders by the grain boundary diffusion process using Nd80Cu20 and Nd82Al18 alloys. δM measurements indicate that Nd2Fe14B nanocrystals are magnetically decoupled after the diffusion process. Transmission electron microscopy revealed that the exchange decoupling is due to the formation of a thin Nd-rich phase at the grain boundaries. The mechanism of the coercivity enhancement is discussed based on microstructure observations and micromagnetic simulations.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
H. Sepehri-Amin, D. Prabhu, M. Hayashi, T. Ohkubo, K. Hioki, A. Hattori, K. Hono,