Improved high-frequency and anti-corrosion performance of FeNi soft magnetic composites through regulating SiO2 shell growth in a dual silicon source involved route

被引：3

作者：

Wan, Kun ^{[1
,2
,3
]}

Mei, Chao ^{[1
,2
,3
]}

Liu, Wei ^{[1
,2
,3
]}

Zhang, Xuebin ^{[1
,2
,3
,4
,5
]}

Zou, Zhongqiu ^{[4
,5
,6
]}

Su, Hailin ^{[1
,2
,3
,4
,5
,6
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

[2] Hefei Univ Technol, Anhui Prov Key Lab Adv Funct Mat & Devices, Hefei 230009, Peoples R China

[3] Hefei Univ Technol, Minist Educ, Engn Res Ctr High Performance Copper Alloy Mat & P, Hefei 230009, Peoples R China

[4] Anhui Red Magneto Elect Technol Co Ltd, Wuhu 241002, Peoples R China

[5] Jiangsu Red Magnet Mat Inc, Huaian Engn Res Ctr Soft Magnet Powder Cores & Dev, Huaian 211700, Peoples R China

[6] Huaibei Red Magneto Elect Technol Co Ltd, Huaibei 241002, Peoples R China

来源：

SURFACES AND INTERFACES | 2024年 / 44卷

关键词：

Soft magnetic composites; Shell growth mechanisms; Dual silicon sources; Magnetic properties; Anti-corrosion performance; PARTICLES; SURFACE;

D O I：

10.1016/j.surfin.2023.103691

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Optimizing dense insulating shells plays a crucial role in developing high-frequency soft magnetic composites (SMCs) working in acidic and salty environments. Herein, raspberry-like and litchi-like SiO2 shells are fabricated on FeNi particles by using both 3-aminopropyl triethoxysilane (APTES) and tetraethyl orthosilicate. It is found that low dosages of APTES lead to raspberry-like shells consisting of internal SiO2 layer and attached SiO2 particles. While high dosages of APTES result in litchi-like shells, owing to a much higher coordinated growth rate between the inner layer and SiO2 particles. With regard to corrosion resistance performance, the litchi-like shell contributes to a more positive corrosion potential of -0.076 V, a lower corrosion current density of 2.512 x 10(-6) A/cm(2), a higher corrosion protection efficiency of 96.70 % and a lower ion concentration in the HCl etching solution. As for magnetic properties, higher resistivity of 1.46 x 10(8) Omega<middle dot>m, lower eddy current loss with mu ' of 13.98 and lower tan delta of 0.01148 at 2000 kHz can be realized by the dense litchi-like shell structure. This work not only demonstrates detailed growth mechanisms of different SiO2 shells, provides FeNi SMCs with desirable high frequency and anti-corrosion performance, but also offers deeper insights into functional shell design.

引用

页数：8