High Performance (Nd,Pr)-(Fe,Co)-B Magnets
Final rept. 1 Jun 2000-31 Dec 2001
DELAWARE UNIV NEWARK
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This project was focused on the advanced NdPr-Fe-B based magnets. The aim of this study was twofold 1 to develop high performance nanocomposite R2Fe14Balpha-Fe magnets through adjustments in chemical compositions and processing conditions and 2 to investigate the effect of small substitutions on the coercivity of the higher energy product BHm Nd-Fe-B sintered magnets in an attempt to increase their coercivity without decreasing much their remanent magnetization. The studies on nanocomposite magnets have been very successful and led to the development of Pr-Th-Fe-Nb-B magnets with BHm17.3 MGOe. In the other project, Ga substitution was found to alter the intergranular morphology and chemical composition, and thus significantly increase the coercivity through domain wall pinningnucleation.
- Electricity and Magnetism