CeFeCo稀土软磁复合材料制备及高频性能调控
Fabrication and high-frequency performance manipulation for CeFeCo rare-earth soft magnetic composites
刘广 1熊清碧 1万文晨 1刘昱来 1严密 2吴琛2
作者信息
- 1. 浙江大学材料科学与工程学院,浙江 杭州 310012
- 2. 浙江大学材料科学与工程学院,浙江 杭州 310012;白云鄂博稀土资源研究与综合利用全国重点实验室,包头稀土研究院,内蒙古 包头 014030
- 折叠
摘要
以Ce2(Fe0.8Co0.2)17稀土软磁合金为研究对象,研究了球磨和表面氧化工艺对稀土软磁复合材料显微组织、软磁性能和高频损耗的调控机制.研究表明,稀土软磁复合材料在兆赫兹频段具有优异的频率稳定性,球磨制备的片状磁粉可引入尺寸和形状效应,有效抑制高频铁磁共振,显著提升截止频率,并降低涡流效应.对片状磁粉表面进一步氧化处理,可阻断磁粉间的涡流传输路径,大幅降低高频涡流损耗,在3 MHz、10 mT下磁芯的功率损耗仅为1 363.1 kW/m3,为高频低损耗软磁复合材料的研发奠定了基础.
Abstract
Ce2(Fe0.8Co0.2)17 as a rare-earth soft magnetic alloy was focused on,and the regulatory mechanisms of ball-milling and surface oxidation on the microstructure,soft magnetic properties,and high-frequency loss of corre-sponding composites were elucidated.The rare-earth soft magnetic composites exhibit exceptional frequency stability within the megahertz range.Flakey magnetic powders obtained via ball milling are beneficial to introduce size and shape effects to effectively suppress high-frequency ferromagnetic resonance,enhance the cutoff frequency,and mit-igate eddy current effects.Surface oxidation of the flaky powders further disrupts eddy current pathways between the magnetic particles,significantly reducing high-frequency eddy current loss.The optimized magnetic core demon-strates a low power loss of 1 363.1 kW/m3 at 3 MHz and 10 mT,laying foundation for the development of high-fre-quency and low-loss soft magnetic composites.
关键词
稀土软磁/复合材料/球磨/绝缘包覆/功率损耗Key words
rare-earth soft magnetic/composite material/ball-milling/insulation coating/power loss引用本文复制引用
出版年
2024
NETL
NSTL
万方数据