IMECH-IR  > 国家微重力实验室
Effect of niobium substitution on microstructures and thermal stability of TbCu7-type Sm-Fe-N magnets
Wu GY; Li HW; Yu DB; Li KS; Yan WL; Yuan C; Sun L; Luo Y; Zhang K(张坤)
2018-03-01
发表期刊JOURNAL OF RARE EARTHS
卷号36期号:3页码:281-286
ISSN1002-0721
摘要

This paper reports crystal structures, magnetic properties and thermal stability of TbCu7-type Sm8.5Fe(85.8-x)Co4.5Zr1.2Nbx (x = 0-1.8) melt-spun compounds and their nitrides, investigated by means of X-ray diffraction, vibrating sample magnetometer, flux meter and transmission electron microscope. It is found that the lattice parameter ratio c/a of TbCu7-type crystal structure increases with Nb substitution, which indicates that the Nb can increase the stability of the metastable phase in the Sm-Fe ribbons. Nb substitution impedes the formation of magnetic soft phase alpha-Fe in which reversed domains initially form during the magnetization reversal process. Meanwhile, Nb substitution refines grains and leads to homogeneous microstructure with augmented grain boundaries. Thus the exchange coupling pining field is enhanced and irreversible domain wall propagation gets suppressed. As a result, the magnetic properties are improved and the irreversible flux loss of magnets is notably decreased. A maximum value 771.7 kA/m of the intrinsic coercivity H-cj is achieved in the 1.2 at% substituted samples. The irreversible flux loss for 2 h exposure at 120 degrees C declines from 8.26% for Nb-free magnets to 6.32% for magnets with 1.2 at% Nb substitution. (C) 2018 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths.

关键词Magnetic Properties Thermal Stability Grain Size Pinning Field Irreversible Flux Loss Rare Earths
DOI10.1016/j.jre.2017.05.008
URL查看原文
收录类别SCI ; EI
语种英语
WOS记录号WOS:000427615000009
关键词[WOS]Nanocrystalline Permanent-magnets ; Nitrides ; Alloys ; Coercivity ; Behavior ; Reversal ; Ribbons
WOS研究方向Chemistry, Applied
WOS类目Chemistry
项目资助者National Natural Science Foundation of China [51401028]
论文分区二类
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77916
专题国家微重力实验室
通讯作者Zhang K(张坤)
作者单位1.Grirem Adv Mat Co Ltd, Gen Res Inst Nonferrous Met, Natl Engn Res Ctr Rare Earth Mat, Beijing 100088, Peoples R China
2.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714
Wu GY,Li HW,Yu DB,et al. Effect of niobium substitution on microstructures and thermal stability of TbCu7-type Sm-Fe-N magnets[J]. JOURNAL OF RARE EARTHS,2018,36(3):281-286.
APA Wu GY.,Li HW.,Yu DB.,Li KS.,Yan WL.,...&Zhang K.(2018).Effect of niobium substitution on microstructures and thermal stability of TbCu7-type Sm-Fe-N magnets.JOURNAL OF RARE EARTHS,36(3),281-286.
MLA Wu GY,et al."Effect of niobium substitution on microstructures and thermal stability of TbCu7-type Sm-Fe-N magnets".JOURNAL OF RARE EARTHS 36.3(2018):281-286.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Wu GY]的文章
[Li HW]的文章
[Yu DB]的文章
百度学术
百度学术中相似的文章
[Wu GY]的文章
[Li HW]的文章
[Yu DB]的文章
必应学术
必应学术中相似的文章
[Wu GY]的文章
[Li HW]的文章
[Yu DB]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。