检索结果-南通市图书馆

Highly sensitive and dynamically stable strain sensors based on porous-designed fe nanowires/multi-walled carbon nanotubes with stable bi-conducting networks

引用

Science China(Technological Sciences) 2022年第12期65卷 2990-2999页

作者： YANG PingAn LIU ZhongBang LUO Jiufei LI Rui LU Yi HUANG Xin ZHANG Qiang ZHOU ZhiHao School of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Advanced Manufacturing Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China College of Engineering and Technology Zunyi Normal CollegeZunyi 563006China

Flexible sensors for high strain sensitivity and dynamic stability are important for the development of human-interactive and health-monitoring devices.However,establishing a stable conductive network with low-conductivity material filling that can resist tensile strain failure and achieve high device performance still faces significant challenges.Herein,a highly stretchable and sensitive strain sensor with strong dynamic stability and low conductive materials filling was fabricated based on highly conductive multi-walled carbon nanotubes(MWCNTs)and fe nanowires(NWs)to construct a porous-designed bi-conducting network using a salt sacrificial template approach.The porous-designed fe NW/MWCNT strain sensor(PFMS)with low material filling(3.6 wt.%fe NWs and 10.6 wt.%MWCNTs)showed high sensitivity with a gauge factor(GF)of 134.98(strain range 0–22%)and 569.37(strain range 22%–60%),which is much higher compared with the pure MWCNT strain sensor with a GF of 7.46.This is attributed to the significant change in the contact area and contact resistance of the fe NW/MWCNT bi-conducting network during tensile strain.In addition,the PFMS exhibited high repetitive stability over 2000 stretching-releasing cycles.When attached to the human body,the PFMS functions as a health-monitoring device,that can accurately distinguish human motions such as the bending of fingers,knees,and elbows.Finally,the proposed strategy pens a novel avenue for constructing porous conductive networks using polymer composites and is highly competitive for developing high-performance strain sensors.

关键词： flexible strain sensor multi-walled carbon nanotubes fe nanowires porous structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Strain-rate-induced bcc-to-hcp phase transformation of fe nanowires

引用

Chinese Physics B 2016年第12期25卷 361-366页

作者：谢红献于涛方伟殷福星 Dil Faraz Khan School of Mechanical Engineering Hebei University of Technology Tianjin 300132 China Central Iron and Steel Research Institute Beijing 100081 China Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology Tianjin 300132 China Research Institute for Energy Equipment Materials Hebei University of Technology Tianjin 300132 China Department of Physics University of Science and Technology Bannu Bannu 28100 Pakistan

Using molecular dynamics simulation method, the plastic deformation mechanism of fe nanowires is studied by applying uniaxial tension along the [110] direction. The simulation result shows that the bcc-to-hcp martensitic phase transformation mechanism controls the plastic deformation of the nanowires at high strain rate or low temperature; however, the plastic deformation mechanism will transform into a dislocation nucleation mechanism at low strain rate and higher temperature. Furthermore, the underlying cause of why the bcc-to-hcp martensitic phase transition mechanism is related to high strain rate and low temperature is also carefully studied. Based on the present study, a strain rate-temperature plastic deformation map for fe nanowires has been proposed.

关键词： fe nanowires atomistic simulations phase transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Micromagnetic simulation on magnetic properties of Nd2fe14B/α-fe nanocomposites with fe nanowires as the soft phase

引用

Frontiers of Materials Science 2018年第4期12卷 348-353页

作者： Wei LI Lizhong ZHAO Zhongwu LIU School of Materials Science and Engineering South China University of TechnologyGuangzhou 510640China

fe nanowire array with strong shape anisotropy was employed as the soft phase in Nd-fe-B based nanocomposites. The effects of the fe nanowire distribution on magnetic properties of the nanocomposites were investigated by micromagnetic simulation. The results indicate that the shape anisotropy of fe wires added in the same direction as the uniaxial magnetocrystalline anisotropy of the hard phase cannot increase the coercivity of the nanocomposite. When the nanowires are distributed perpendicular to the easy axis of the hard phase, the shape anisotropy of soft phase can retard the moments from rotating to the full reversed direction, leading to enhanced coercivity. In addition, with increasing the nanowire diameter, the coercivity of the nanocomposite decreases, but the dipolar interaction shows different roles in magnetic reversal of nanocomposite for different distributions of nanowires. The current results suggest that the coercivity of the Nd2fe14B/α-fe nanocomposite can be enhanced by introducing the soft magnetic nanowire array with the diameter less than the exchange length and with the long axis along the direction other than the easy axis of hard phase.

关键词： Nd 2 fe 14 B/α-fe nanocomposite micromagnetic simulation fe nanowires shape anisotropy exchange coupling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：