A composite coating of GO-Al2O3 for tritium permeation barrier

被引：18
|
作者：
Yang, Hao [1 ,2 ]
Shao, Zongming [1 ,2 ]
Wang, Wei [1 ]
Ji, Xiang [1 ]
Li, Chunjing [1 ]
机构：
[1] Chinese Acad Sci, Inst Nucl Energy Safety Technol, Key Lab Neutron & Radiat Safety, Hefei 230031, Anhui, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
来源：
FUSION ENGINEERING AND DESIGN | 2020年 / 156卷
基金：
中国国家自然科学基金;
关键词：
Tritium permeation barrier; Coating; Graphene oxide; Alumina; Sol-gel; GRAPHENE; STRENGTH; DESIGN;
D O I：
10.1016/j.fusengdes.2020.111689
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
To improve tritium permeation resistance and toughness of Al2O3 coating, a new graphene oxide (GO)-alumina (Al2O3) composite coating as tritium permeation barrier was designed in this paper. GO was added into Al2O3 to prepare the composite coating of GO-Al2O3 by a sol-gel method. The results showed that the deuterium permeation reduction factor (PRF) of 0.5 wt% GO-Al2O3 coating was higher than that of the pure Al2O3 coating at 500 degrees C. It was related to the GO nanosheets blocking the diffusion of deuterium atoms in the Al2O3 coating and reducing the permeability. Meanwhile, the toughness of the 0.5 wt% GO-Al2O3 coating was enhanced by about 40 % than the pure Al2O3 coating. The reason can be speculated that GO nanosheets can prevent the cracks propagation in the composite coating of GO-Al2O3. This study could provide a new material of tritium permeation barrier for fusion reactors.
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页数：7
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