Improvement of Magnetic Performance for the Fe-6.5 wt%Si Soft Magnetic Composites
Many efforts have been carried out to improve the magnetic performance of Fe-6.5Si soft magnetic composites through element doping,multi-constituents compositing and hybrid insulated coating.Results are shown as follows.(1)The core loss of Ti-doped Fe-6.5Si SMCs decreases first and then increases with increasing the Ti addition,while the tendency of permeability is opposite.It exhibits optimal magnetic properties for 0.5 wt%Ti doping,in which core loss and permeability reduced by 13.5%and increased by 19.1%compared with Ti-free Fe-6.5Si SMCs,respectively.The permeability of Fe-6.5Si SMCs increases significantly with Co doping.Compared with Fe-6.5wt%Si SMCs,it enhances by about 37%for 5.0 wt%Co-doped Fe-6.5wt%Si SMCs.It shows lowest core loss for 3.0 wt.%Co-doped Fe-6.5Si SMCs.(2)Compared with Fe-6.5Si SMCs,the hybrid SMCs with addition of 3.0 wt%Fe nanoparticles shows better magnetic performance,in which the permeability increases by 173%and the core loss decreases by 17.5%.When the volume ratio of Fe-6.5Si and Fe73.5Cu1Nb3Si13.5B9 is 6:4,the hybrid SMCs displays good comprehensive properties and its core loss decreases by 69.69%while the permeability drops only by 7.4%compared to that of Fe-6.5Si SMCs.(3)Compared with single phosphate or silica coating,Fe-6.5Si SMCs with hybrid phosphate-silica insulated coating exhibits better magnetic performances.The Fe-6.5Si SMCs with phosphate concentration of 0.004 and silica content of 0.4 shows best comprehensive performance,in which core loss and permeability decreases by 83.5%and increases by 71.4%compared with the SMCs with single phosphate coating.
Fe-6.5Si soft magnetic composites Element doping Multi-constituents compositing Hybrid insulated coating Magnetic performance
Liu Xin Wang Jian Mao Xinhua Mo Jian
Guangdong Institute of Materials and Processing,Guangdong Academy of Sciences,Guangzhou 510650,Guangdong,China;National Engineering Research Center of Powder Metallurgy of Titanium & Rare Metals,Guangzhou 510650,Guangdong,China
国际会议
北京
英文
1425-1431
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）