矫顽力
磁铁
材料科学
晶界
微观结构
晶间腐蚀
超晶格
透射电子显微镜
相(物质)
粒度
结晶学
凝聚态物理
冶金
化学
纳米技术
光电子学
物理
有机化学
量子力学
作者
Shulin Huang,Yingcai Mao,Haibin Wang,Xinshuo Chen,Xiangke Lv,Xike Ouyang,Guangzi Lai,Yong Ding,Min Zhang
出处
期刊:AIP Advances
[American Institute of Physics]
日期:2023-05-01
卷期号:13 (5)
摘要
In this work, we focus on the modification of the Cu element in commercial N40M magnets toward the composition and structure of the grain boundary phase. The magnetic properties and microstructure of Ce-magnets with low and high Cu content were investigated. The Ce-magnet with high Cu-content has higher coercivity and a more continuous and homogenous grain boundary phase. The grain boundary phase’s structural shift is found to be the source of the coercivity change. The transmission electron microscopy study shows that the PrNd23Ce7Gd1.5FebalB0.93Cu0.35M1 magnet contains fcc and hcp type (Ce, Nd)-oxide phases, each with a different O concentration. The formation of the superlattice has been examined, and the superlattice spots show that the Cu-rich phases have an ordered structure.
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