Initiation of vacuum breakdown and failure mechanism of the carbon nanotube during thermal field emission

The carbon nanotube （CNT）-based materials can be used as vacuum device cathodes. Owing to the excellent field emission properties of CNT, it has great potentials in the applications of an explosive field emission cathode. The falling off of CNT from the substrate, which frequently appears in experim...

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Bibliographic Details
Published inChinese physics B Vol. 25; no. 4; pp. 206 - 213
Main Author 蔡丹 刘列 巨金川 赵雪龙 周泓宇 王潇
Format Journal Article
LanguageEnglish
Published 01.04.2016
Subjects
Breakdown
Carbon nanotubes
Cathodes
Diodes
Failure mechanisms
Field emission
Mathematical analysis
Substrates
发射过程
场发射特性
场发射阴极
失效机理
有限元法
热场
真空击穿
碳纳米管
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/25/4/045101

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Summary:The carbon nanotube （CNT）-based materials can be used as vacuum device cathodes. Owing to the excellent field emission properties of CNT, it has great potentials in the applications of an explosive field emission cathode. The falling off of CNT from the substrate, which frequently appears in experiments, restricts its application. In addition, the onset time of vacuum breakdown limits the performance of the high-power explosive-emission-cathode-based diode. In this paper, the characteristics of the CNT, electric field strength, contact resistance and the kind of substrate material are varied to study the parameter effects on the onset time of vacuum breakdown and failure mechanism of the CNT by using the finite element method.
Bibliography:11-5639/O4
carbon nanotube, thermal field electron emission, vacuum breakdown, failure mechanism
The carbon nanotube （CNT）-based materials can be used as vacuum device cathodes. Owing to the excellent field emission properties of CNT, it has great potentials in the applications of an explosive field emission cathode. The falling off of CNT from the substrate, which frequently appears in experiments, restricts its application. In addition, the onset time of vacuum breakdown limits the performance of the high-power explosive-emission-cathode-based diode. In this paper, the characteristics of the CNT, electric field strength, contact resistance and the kind of substrate material are varied to study the parameter effects on the onset time of vacuum breakdown and failure mechanism of the CNT by using the finite element method.
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/25/4/045101