首页|High-performance Ce-substituted (Nd0.7Ce0.3)-Fe-B hot-deformed magnets fabricated from amorphous melt-spun powders
High-performance Ce-substituted (Nd0.7Ce0.3)-Fe-B hot-deformed magnets fabricated from amorphous melt-spun powders
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NSTL
Elsevier
We report a method to produce high-performance and cost-effective Ce-substituted Nd-Fe-B hot-deformed magnets with 30% Nd reduction. To suppress the formation of the Ce-dissolved REFe2 phase, which primarily limits [001] texture development and RE-rich grain boundary phase formation, amorphous melt-spun precursors were used to fabricate 30%-Ce-substituted hot-deformed magnets. By suppressing the formation of REFe2 phase from the precursors, the c-axis alignment of 2:14:1 platelets in the magnets due to grain boundary sliding and rotation improved, and the Nd/Ce-concentration of grain boundary phases in the magnets increased. As a result, both coercivity (Hcj) and remanence (4 pi M-r) of the magnets noticeably increased to 15 kOe and 13 kG, respectively, in relation to those of the magnets fabricated from crystalline precursors containing an REFe2 phase (H-cj = 13.4 kOe, 4 pi Mr = 12.1 kG). The magnetic performance of the 30%-Ce-substituted magnets developed in this work is sufficient to replace the N42M-graded commercial Ce-free magnets.
NSTL
Elsevier
