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Einfluss von Lanthan auf Gefügeentwicklung und verbesserte magnetische Eigenschaften von Cer enthaltenden gesinterten Magneten
Author(s) -
Wei Z.,
Ying L.,
Jun L.,
Lele L.,
Xi G.
Publication year - 2020
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.202000021
Subject(s) - lanthanum , microstructure , cerium , materials science , alloy , magnet , coercivity , lanthanide , grain boundary , doping , metallurgy , grain size , phase (matter) , chemistry , inorganic chemistry , condensed matter physics , ion , optoelectronics , physics , organic chemistry , quantum mechanics
In this study, lanthanum was applied to strip cast Ce−Fe−B alloy to improve its phase composition and microstructure. The results reveal that lanthanum doping can significantly enhance the proportion of 2 : 14 : 1 phase and improve the microstructure of Ce−Fe−B alloy. Besides, the influence of the starting alloys structure on the microstructure and magnetic properties of final multi‐phases cerium‐containing magnets was also systematically investigated. Compared to the multi‐phases magnet without lanthanum addition, a pronounced coercivity increment could be distinguished in lanthanum‐doping multi‐phases magnet, which could be attributed to the finer grain size together with ideal grain boundary. In this work, the superior performance of H cj = 701.28 kA/m B r = 1.30 T, and ( BH ) max = 313.70 kJ/m 3 were obtained by blending Nd−Fe−B alloy with (La 0.35 Ce 0.65 )‐Fe−B alloy to meet 25.0 wt.% lanthanum‐cerium utilization content, suggesting that the possibility to develop high abundant rare earth permanent magnetic materials.