Development of nanocrystalline soft magnetic alloy with high saturation magnetic induction produced in air

空气中高饱和磁感纳米晶软磁合金的研制

基本信息

批准号：
13555190
负责人：
MAKINO Akihiro
金额：
$ 5.76万
依托单位：
Akita Prefectural University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555190/
关键词：
nanocrystalline alloy soft magnetic material melt-spinning technique high magnetic induction high permeability low core loss ナノ結晶軟磁性合金

项目摘要

The nanocrystalline soft magnetic Fe-Nb-B based alloys, which can be produced by melt-spinning in air, with high saturation magnetic induction (B_s) as well as good soft magnetic properties have been developed. The Fe_<84>Nb_7B_9 alloy, which is the typical composition of the ternary Fe-Nb-B alloys, produced in air was extremely oxidized and showed brittleness. The ductile ribbons with the metallic luster were obtained for the ternary alloys with 6 at% Nb or less. Furthermore, higher B_s than 1.6 T has been obtained for the alloys with 6 at% Nb or less. However, the alloys exhibit inferior soft magnetic properties because the alloys have a mixed as-quenched structure composed of an amorphous phase and coarse α-Fe grains. These grains remain in the nanostructure after the crystallization and deteriorate the soft magnetic properties.The effect of the addition of some elements to Fe-Nb-B alloys on the as-quenched structure and the soft magnetic properties in the nanocrystallized state has been investigated. The simultaneous replacement of B by 1 at% P and Fe by 0.1 at% Cu in the alloy decreases the α-Fe grain size to the nano-scale in an as-quenched state and leads to a homogeneous nanostructure with good soft magnetic properties after crystallization. Analysis based on the random anisotropy model shows that a homogeneous nanostructure with small volume fraction of an inter-granular amorphous phase which has high Curie temperature is necessary for realizing the good soft magnetic properties. The Fe_<84.9>Nb_6B_8P_1Cu_<0.1> alloy exhibits high permeability of 41,000 at 1 kHz, very low core loss of 0.11 W/kg at 1.4 T and 50 Hz as well as higher B_S of about 1.61 T than that of the Fe_<84>Nb_7B_9 alloy.

纳米晶体软磁性Fe-Nb-b的合金可以通过空气中的熔融旋转产生，具有高饱和磁感应（B_S）以及良好的软磁性性能。 Fe_ <84> NB_7B_9合金是在空气中产生的三元Fe-NB-B合金的典型组成，被极大地氧化并显示出脆性。获得了具有金属光泽的延展性丝带，可为6％或更小的三元合金获得金属光泽。此外，对于6％或更小的合金，获得了比1.6 t高的B_s。然而，合金暴露了下部软磁性能，因为合金具有由无定形相和粗α-FE晶粒组成的混合液体结构。结晶后这些晶粒保留在纳米结构中并检测软磁性能。已经研究了Fe-Nb-B合金对AS猝灭结构中添加某些元素的影响以及纳米结晶状态中的软磁性能的影响。在合金中，简单地将B替换为1％P和Fe 0.1 AT％Cu，将α-FE晶粒尺寸降低到液态状态下的纳米尺度，并导致结晶后具有良好软磁性的均质纳米结构。基于随机各向异性模型的分析表明，具有较高居里温度的颗粒间无定形相的同质纳米结构对于实现良好的软磁性能是必不可少的。 FE_ <84.9> NB_6B_8P_1CU_ <0.1>合金在1 kHz时表现出41,000的高渗透率，在1.4 T和50 Hz时的0.11 W/kg的核心损失非常低，而B_S则比FE_ <84> nb_7b_9 alloy的核心损失和较高的B_S高约1.61 t。