| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1500177 | Scripta Materialia | 2011 | 4 Pages |
Coercivity of Nd–Fe–B sintered magnets was obviously enhanced by DyF3 additions with little sacrifice of remanence and squareness factor. An ordered rare-earth oxyfluoride grain boundary phase containing ∼30 at.% F was formed. In addition, the presence of F decreased the thickness of the region of reduced anisotropy of the Nd2Fe14B grain. Dy segregated on the surface of the Nd2Fe14B grains. The individual effects of F and Dy elements on the increased coercivity are discussed based on these results.
► Coercivity of Nd–Fe–B sintered magnets can be increased by DyF3 additions. ► The coercivity approaches 2018 kA m−1 by 2.0 wt.% DyF3 with little loss of remanence. ► (Nd,Dy)2Fe14B phase with high magnetic anisotropy is formed in the magnet. ► An ordered rare-earth oxyfluoride grain boundary phase with ∼30 at.% F is formed. ► F decreases the thickness of the reduced anisotropy region of the Nd2Fe14B grain.
