摘要
以构建高磁感、低铁损、免轧制高硅电工钢铁芯为出发点,提出采用单辊甩带制备非晶铁硅合金薄带、微氧化法在铁硅合金粉末表面包覆高电阻率铁硅氧化物薄膜制备核壳异质结构高硅电工钢纳米粉末、放电等离子烧结快速成形制备颗粒间绝缘的高硅电工钢铁芯。研究了不同氧化包覆时间对SPS烧结试样密度、物相组成、微观结构和静磁性能的影响。研究表明,在氧化包覆5h烧结温度800℃工艺条件下,制备的6.5%Si高硅电工钢铁芯的静磁性能最佳,饱和磁化强度为128.84A.m2/kg、矫顽力为2.25kA/m、剩磁为3.47A.m2/kg。其饱和磁化强度与粉末压延法制备的高硅钢相当,但矫顽力降低了1/3。
The paper takes preparation 6.5 % Si steel with high induction, low core loss and removing rolling as the starting point, amorphous Fe-Si ribbons was synthesized by melt spinning method, 6.5% Si steel nanopowders with high resietivity core shell structure was prepared by the slight oxidation process and 6.5% Si steel iron core with evaluating internal was sintered by spark plasma sintering process（SPS）. The essay focuses studies the effects of different oxidation cladding time on sample density, phase composition, micro structure and static magnetism. It showed that micro structure was best when oxidation cladded 5 hours and sintered at 800 C, the saturated magnetization was 128.84A. m^2/kg, coercive force was 2.25kA/m and remanent magnetism was 3.47A . m^2/kg. The saturated magnetization is equivalent to that silicon steel prepared by DPR, but the coercive force reduced one third.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第10期1431-1436,共6页
Journal of Functional Materials
基金
国家自然科学基金面上资助项目(11074195)
湖北省研究与开发计划资助项目(2011BAB039)
