气雾化法制备Fe-6.5%Si-x%Ni合金粉末及其性能的研究

发布时间：2018-05-08 14:26

本文选题：气雾化 + 金属软磁　；参考：《稀有金属》2017年11期

【摘要】：采用气雾化法制得了Fe-6.5%Si-x%Ni(x=0,0.2,0.5,0.8,1.0;质量分数)金属软磁合金粉末,对合金粉末进行绝缘包覆处理后压制成磁粉芯进行磁性能检测,磁粉芯尺寸为27 mm×15 mm×5 mm,压制压力为1 GPa。利用激光粒度分析仪、扫描电子显微镜(SEM)、X射线衍射仪(XRD)和软磁交流分析仪对粉末的粒度分布、形貌、相组成和磁性能进行检测和分析。结果表明:在雾化过程中,随着Ni元素添加量的增加,金属液粘度增加,雾化时间变长,粉末颗粒尺寸增大,中位径d50从21.04μm增大到38.62μm;粉末为球形或近球形,部分粉末表面有卫星球;粉末为单相α-Fe相,表明Ni元素以固溶体形式溶入基体晶格,造成晶格畸变,增加了合金粉末的内应力;随着Ni元素含量的升高,矫顽力先升高后降低,添加1.0%Ni时为最优值307.9 A·m-1(0.05 T,100 k Hz),振幅磁导率先降低后升高添加1.0%Ni时为最优值15.7(0.05 T,100 k Hz),且在频率达到80 k Hz时略有升高,磁损耗先升高后降低,在添加1.0%Ni时为最优值4595 m W·cm-3(0.05 T,100 k Hz)。
[Abstract]:Fe-6.5Si-x Si-x alloy powder was obtained by gas atomization method, and the metal soft magnetic alloy powder was obtained by mass fraction. The magnetic properties of the alloy powder were tested by insulating coating. The size of magnetic powder core was 27 mm 脳 15 mm 脳 5 mm, and the pressing pressure was 1 GPa. the magnetic properties of the alloy powder core were measured by gas atomization method, and the results showed that the magnetic powder core size was 27 mm 脳 15 mm 脳 5 mm, and the pressing pressure was 1 GPa. The particle size distribution, morphology, phase composition and magnetic properties of the powder were measured and analyzed by laser particle size analyzer, scanning electron microscope (SEM) and X-ray diffraction (XRD) and soft magnetic AC analyzer. The results show that with the increase of Ni content, the viscosity of liquid metal increases, the atomization time becomes longer, the particle size increases, the median diameter D50 increases from 21.04 渭 m to 38.62 渭 m, and the powder is spherical or nearly spherical. Some of the powder surface has satellite sphere, the powder is single phase 伪 -Fe phase, which indicates that Ni element is dissolved into the matrix lattice in the form of solid solution, resulting in lattice distortion and increasing the internal stress of the alloy powder, and the coercivity increases first and then decreases with the increase of Ni content. When 1.0%Ni was added, the optimum value was 307.9 A m ~ (-1) ~ 0. 05 T ~ (100) H ~ (zn), and when the amplitude permeability first decreased and then increased, the optimum value was 15.7T ~ (0.05) T ~ (100) H _ (zn), and the magnetic loss increased slightly and then decreased when the frequency reached 80 kHz, and the best value was 4595 MW cm-3(0.05 T _ (100) H _ (1) when 1.0%Ni was added.
【作者单位】：北京康普锡威科技有限公司;
【基金】：北京市科技新星计划项目(Z141103001814079)资助
【分类号】：TF123.2

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