Effects of adding different types of carbon on the structure and magnetic properties of SmCo6.9Hf0.1 alloy

In this paper,SmCo6.9 Hf0.1 as-cast alloys and ribbons with the addition of either graphite（C） or carbon nanotubes（CNTs） were prepared by arc melting and melt-spinning,respectively.The effects of adding carbon on the structure and magnetic properties SmCo6.9 Hf0.1 were investigated by means of X-ray...

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Published inJournal of rare earths Vol. 31; no. 12; pp. 1168 - 1174
Main Author 孙继兵 步绍静 杨薇 王洪水 崔春翔 何辰辉
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2013
Subjects
Alloying additive
Carbon
crystal structure
Magnetic fields
magnetic measurements
Magnetic properties
magnetically ordered materials
Melt spinning
rapid-solidification
Rare earth metals
rare earths
Ribbons
Scanning electron microscopy
扫描电子显微镜
振动样品磁强计
碳纳米管
磁特性
磁结构
类型
透射电子显微镜
铸态合金
crystal structure
magnetic measurements
magnetically ordered materials
rapid-solidification
rare earths
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Summary:In this paper,SmCo6.9 Hf0.1 as-cast alloys and ribbons with the addition of either graphite（C） or carbon nanotubes（CNTs） were prepared by arc melting and melt-spinning,respectively.The effects of adding carbon on the structure and magnetic properties SmCo6.9 Hf0.1 were investigated by means of X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,magnetic force microscopy（MFM） and vibrating sample magnetometer（VSM）.It was found that the microstructure and magnetic structure of SmCo6.9 Hf0.1 ribbons were changed obviously due to the introduction of C or CNTs,although their crystal structure was characterized as the same Sm（Co,Hf）7 single phase,no matter carbon was added or not.As a result,the magnetic properties of carbon-contained ribbons were enhanced in a certain degree.This was considered to be related to the refined equiaxed grains,small domain size and the pinning effect of C or CNTs-rich regions.The magnetic properties of SmCo6.9 Hf0.1（CNTs）0.05 ribbons reached Hc =12.5 kOe,Mr =57.0 emu/g and Mr/M2 T =0.788.
Bibliography:In this paper,SmCo6.9 Hf0.1 as-cast alloys and ribbons with the addition of either graphite（C） or carbon nanotubes（CNTs） were prepared by arc melting and melt-spinning,respectively.The effects of adding carbon on the structure and magnetic properties SmCo6.9 Hf0.1 were investigated by means of X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,magnetic force microscopy（MFM） and vibrating sample magnetometer（VSM）.It was found that the microstructure and magnetic structure of SmCo6.9 Hf0.1 ribbons were changed obviously due to the introduction of C or CNTs,although their crystal structure was characterized as the same Sm（Co,Hf）7 single phase,no matter carbon was added or not.As a result,the magnetic properties of carbon-contained ribbons were enhanced in a certain degree.This was considered to be related to the refined equiaxed grains,small domain size and the pinning effect of C or CNTs-rich regions.The magnetic properties of SmCo6.9 Hf0.1（CNTs）0.05 ribbons reached Hc =12.5 kOe,Mr =57.0 emu/g and Mr/M2 T =0.788.
11-2788/TF
SUN Jibing;BU Shaojing;YANG Wei;WANG Hongshui;CUI Chunxiang;HE Chenhui;Key Laboratory for New Type of Functional Materials in Hebei Province,School of Materials Science and Engineering,Hebei University of Technology
magnetically ordered materials; rapid-solidification; crystal structure; magnetic measurements; rare earths
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(12)60422-0