Modifying the Properties of Tungsten Based Plasma Facing Materials with Single-Wall Carbon Nanotubes  

作　　者：Shuming Wang Chongxiao Sun Wenhao Guo Changchun Ge Qingzhi Yan Qiang Zhou Pengwan Chen Zhibao Chen 

机构地区：[1]School of Materials Science and Engineering,University of Science & Technology Beijing [2]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology [3]Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials,Jiangxi Academy of Sciences

出　　处：《Journal of Materials Science & Technology》2013年第10期919-922,共4页材料科学技术（英文版）

基　　金：the Chinese National Magnetic Confnement Fusion Program (No.2010GB109000);the National Natural Science Foundation of China (No.51172016);the Opening Research Issues of Jiangxi Key Laboratory of Advanced Copper and Tungsten Materials (No.2010-WT-04)

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.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.

关 键 词：Single-walled carbon nanotubes （SWCNTs） TUNGSTEN Plasma facing materials （PFMs） MODIFICATION 

分 类 号：TB383.1[一般工业技术—材料科学与工程]