Enhanced magnetic properties of anisotropic Nd-Fe-B nanocomposites by Fe(C)coating

被引：0
作者：
Fengqing Wang [1 ]
Guiping Tang [1 ]
Baoru Bian [1 ]
Lulu Yao [1 ]
Youhao Liu [2 ]
Qiang Zheng [3 ]
Juan Du [1 ]
机构：
[1] CAS Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences (CAS)
[2] State Key Laboratory of Rare Earth Permanent Magnetic Materials  3. School of Materials and Chemical Engineering,Ningbo University of Technology
来源：
JournalofRareEarths | 2020年 / 38卷 / 01期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Permanent magnet; Anisotropy; Nanocompo site; Coating; Thermal decomposition; Rare earths;
D O I：
暂无
中图分类号：
TB33 [复合材料];
学科分类号：
0805 ; 080502 ;
摘要：
Nanostructured anisotropic Nd-Fe-B/Fe(C) composite powders were prepared by coating Fe(C) softmagnetic nanoparticles on HDDR Nd-Fe-B hard magnetic powders using iron pentacarbonyl Fe(CO)as soft-phase precursor.The effect of Fe(CO)-loading amount on soft-phase purity,coating morphology and magnetic properties of the composite powders was investigated.Dense and continuous Fe(C) softphase coatings with average particle sizes of 58-68 nm are obtained at Fe(CO)loading amounts of x <12 wt%,leading to enhanced remanence and improved energy product of the coated powders.Positive value in δM-plots and single-phase-like demagnetization curves are observed in the Nd-Fe-B/Fe(C) composite powders,indicating the exchange coupling effect between the coated Fe(C) soft phases and the Nd-Fe-B hard phase.
引用
收藏
页码：84 / 89
页数：6
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