摘要
用双合金工艺在Nd13.05Dy0.23Fe80.12B6.5铸片主合金中分别添加质量分数为3%～20%的富稀土铸锭辅合金Nd38.2Ce11.8Fe44.88Al4.12B,研究在钕铁硼永磁体中用Ce部分地取代Nd时对永磁体的磁性能的变化规律。实验结果表明,在一定的烧结及热处理工艺条件下,辅合金加入量介于8%～12%(质量分数)时,磁体的内禀矫顽力和磁能积相对较高,对剩磁的影响不大。显微成分分析表明,采用双合金法,使组织中细小的颗粒状富稀土相增多,形成了更多的对矫顽力有贡献的富稀土相,并且富稀土相分布于晶界上。
The changes of NdFeB properties and microstructure with substitution of Ce for Nd were studied by adding 3～20wt% sub-alloy Nd38.2Ce11.8Fe44.88Al4.12B to main-alloy Nd13.05Dy0.23Fe80.12B6.5.The result shows that the coercivity and magnetic energy product were higher and the remanence of the magnets changed little under a certain sintering and thermal treatment condition when 8～12wt% sub-alloys were added.The quantity of fine rich rare earth phase in the magnets＇microstructures increased and distributed mainly on crystal boundary.The RE-rich phase is useful to enhance the coercivity of the materials.
出处
《稀土》
EI
CAS
CSCD
北大核心
2012年第2期6-9,共4页
Chinese Rare Earths
基金
国家自然科学基金项目资助(50761001)
关键词
双合金
钕铁硼
磁性能
CE
dual-alloy
NdFeB
magnetic properties
Ce
