Journal
SCRIPTA MATERIALIA
Volume 64, Issue 12, Pages 1137-1140Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.03.011
Keywords
Nd-Fe-B magnets; Coercivity; Grain boundary; DyF3 additions
Categories
Funding
- Shanghai-Applied Materials Research & Development Fund [08520740200]
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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 similar to 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. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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