Modifying the Properties of Tungsten Based Plasma Facing Materials with Single-Wall Carbon Nanotubes
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2013年第10期
论文作者：Shuming Wang Chongxiao Sun Wenhao Guo Changchun Ge Qingzhi Yan Qiang Zhou Pengwan Chen Zhibao Chen
文章页码：919 - 922
摘 要：Tungsten is one of the best candidates for plasma-facing components in fusion reactors owing to its unique properties.But disadvantages such as its brittleness and high ductile-to-brittle transition temperature have restricted its fusion energy application.Single-walled carbon nanotubes（SWCNTs） have the potential to be used as reinforcements due to their excellent mechanical properties.A new method of modifying the properties of tungsten by doping with SWCNTs was introduced.An efficient way of dispersing SWCNTs into the tungsten matrix with strong interfaces by heterocoagulation and ultrasonication was employed,and hot explosive compaction（HEC） technology was selected to compact and sinter the composite powders.The sintering properties,microstructure,densification effect,thermal conductivity,hardness and fracture toughness of the obtained SWCNTs/W bulk samples were tested,and compared with pure tungsten.The influences of SWCNTs on these properties and the main toughening mechanism of SWCNTs in a tungsten matrix were discussed.
Shuming Wang1，Chongxiao Sun1，Wenhao Guo1，Changchun Ge1，Qingzhi Yan1，Qiang Zhou2，Pengwan Chen2，Zhibao Chen3
1. School of Materials Science and Engineering,University of Science & Technology Beijing2. State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology3. Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials,Jiangxi Academy of Sciences
摘 要：Tungsten is one of the best candidates for plasma-facing components in fusion reactors owing to its unique properties.But disadvantages such as its brittleness and high ductile-to-brittle transition temperature have restricted its fusion energy application.Single-walled carbon nanotubes（SWCNTs） have the potential to be used as reinforcements due to their excellent mechanical properties.A new method of modifying the properties of tungsten by doping with SWCNTs was introduced.An efficient way of dispersing SWCNTs into the tungsten matrix with strong interfaces by heterocoagulation and ultrasonication was employed,and hot explosive compaction（HEC） technology was selected to compact and sinter the composite powders.The sintering properties,microstructure,densification effect,thermal conductivity,hardness and fracture toughness of the obtained SWCNTs/W bulk samples were tested,and compared with pure tungsten.The influences of SWCNTs on these properties and the main toughening mechanism of SWCNTs in a tungsten matrix were discussed.
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