Microstructure, formation mechanism and magnetic properties of Fe1.82Si0.18@Al2O3 soft magnetic composites

被引：36

作者：

Luo, Fan ^{[1
,3
]}

Fan, Xi'an ^{[1
,2
,3
]}

Luo, Zigui ^{[1
,3
]}

Hu, Wentao ^{[1
,3
]}

Wang, Jian ^{[4
,5
]}

Wu, Zhaoyang ^{[6
]}

Li, Guangqiang ^{[1
,3
]}

Li, Yawei ^{[1
,2
]}

Liu, Xin ^{[4
,5
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Hubei, Peoples R China

[2] Wuhan Univ Sci & Technol, Natl Prov Joint Engn Res Ctr High Temp Mat & Lini, Wuhan 430081, Hubei, Peoples R China

[3] Wuhan Univ Sci & Technol, Key Lab Ferrous Met & Resources Utilizat, Minist Educ, Wuhan 430081, Hubei, Peoples R China

[4] Guangdong Acad Sci, Guangdong Inst Mat & Proc, Guangzhou 510650, Guangdong, Peoples R China

[5] Guangdong Acad Sci, Natl Engn Res Ctr Powder Met Titanium & Rare Met, Guangzhou 510650, Guangdong, Peoples R China

[6] Anhui Univ Technol, Minist Educ, Key Lab Met Emiss Reduct & Resources Recycling, Maanshan 243002, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2020年 / 493卷

基金：

中国国家自然科学基金;

关键词：

Soft magnetic composites; FeSiAl@Fe3O4; Spark plasma sintering; Fe1.82Si0.18@Al2O3; Core loss; SIO2; NANOPARTICLES; GROWTH-MECHANISM; SILICONE RESIN; EDDY-CURRENT; CORE; MATRIX; XPS; CHEMISTRY;

D O I：

10.1016/j.jmmm.2019.165744

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fe1.82Si0.18@Al2O3 soft magnetic composites (SMCs) have been fabricated by NaOH oxidation combined with subsequent spark plasma sintering (SPS). The microstructure and generation mechanism of Fe3O4 coatings on the surface of FeSiAl powders have been investigated systematically. Effects of oxidation time on the magnetic properties also have been revealed. In addition, the displacement reaction between Fe3O4 and Al during SPS process results in the formation of Al2O3 insulation layer, leading to a remarkable variation of the magnetic performances of SMCs. The increased NaOH oxidation time had positive influences on the electrical resistivity, frequency stability of permeability and core loss. The saturation magnetization first decreases then increases with the increase of oxidation time. These above results indicate that the fabrication method in this paper creates a way to form Fe3O4 nanoparticles and Al2O3 insulation layer, which enhance the magnetic performance of FeSiAl SMCs and will facilitate the design of efficient magnets in the future.

引用

页数：7

共 36 条

[1] Reaction of aluminum with dilute aqueous NaOH solutions [J].