钕磁铁
符号
矫顽力
材料科学
兴奋剂
物理
数学
磁铁
域代数上的
分析化学(期刊)
凝聚态物理
算术
纯数学
量子力学
有机化学
化学
作者
Y. J. Wong,Po‐Hung Lin,H. W. Chang,W.C. Chang
标识
DOI:10.1109/tmag.2023.3282209
摘要
Coercivity enhancement of hot-deformed (HD) NdFeB magnets by doping low-cost Ce80M20-xZnx ( $M$ = Cu and Al; $x$ = 0–20) alloy powders is compared. By doping Ce80M20 -xZnx powders, coercivity ( $_{i}H_{c}$ ) is increased from 15.0 kOe for the as-upset magnet to 17.2–18.5 kOe for $M$ = Cu and 17.0–19.1 kOe for $M$ = Al, respectively. Compared to the magnet doped with Ce80Al20 ( $_{i}H_{c}$ = 17.0 kOe), the magnet doped with Ce80Al10Zn10 exhibits a higher $_{i}H_{c}$ of 19.1 kOe. In addition, the grain morphology of the magnet doped with Ce80Al10Zn10 is more platelet-like than that doped with Ce80Al20. The platelet grain morphology contributes to the good (00L) texture, and thus, higher remanence is obtained. Microstructure and element analysis show Ce, Al, Cu, and Zn prefer to distribute at grain boundary, which can strengthen the decoupling effect between the adjacent Nd2Fe14B (2:14:1) grains. Almost unchanged Curie temperature ( $T_{C}$ ) of 2:14:1 phase for the magnet doped with Ce80Al10Zn10 also indicates Ce mostly distributes at the grain boundary. The effect of doping Ce–Al–Zn-containing alloys on the coercivity enhancement and mechanism for HD NdFeB magnets is also discussed in this work.
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