Preparing Al2O3/TiO2 nano-multilayers on the surface of FeAl/Al2O3 coating as tritium permeation barrier
Preparing tritium permeation barrier (TPB) coating on the surface of structural materials can effectively alleviate tritium permeation in fusion reactor system. However, due to the existence of inevitable certain number of defects in TPB, there is still a gap between the commonly prepared TPB coatin...
| 出版年: | Nuclear Fusion |
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| 主要な著者: | , , , , , , , |
| フォーマット: | 論文 |
| 言語: | 英語 |
| 出版事項: |
IOP Publishing
2024-01-01
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| 主題: | |
| オンライン･アクセス: | https://doi.org/10.1088/1741-4326/ad9b37 |
| _version_ | 1849528035273867264 |
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| author | Enkai Guo Yifu He Fen Zhong Bowen Fu Kun Wang Guangxu Cai Changzhong Jiang Feng Ren |
| author_facet | Enkai Guo Yifu He Fen Zhong Bowen Fu Kun Wang Guangxu Cai Changzhong Jiang Feng Ren |
| author_sort | Enkai Guo |
| collection | DOAJ |
| container_title | Nuclear Fusion |
| description | Preparing tritium permeation barrier (TPB) coating on the surface of structural materials can effectively alleviate tritium permeation in fusion reactor system. However, due to the existence of inevitable certain number of defects in TPB, there is still a gap between the commonly prepared TPB coatings and the requirements proposed by fusion reactors. In this work, composite coatings with Al _2 O _3 /TiO _2 nano-multilayers (NMLs) covering on the surface of FeAl/Al _2 O _3 coating were prepared as TPB. The FeAl/Al _2 O _3 TPB coating on the surface of 316L stainless steel was prepared by electrochemical deposition of Al, aluminization and in-situ oxidation. Due to the aggregation of Cr, there are micro sized defects in the Al _2 O _3 layer. The presence of defects seriously reduces its hydrogen isotopes permeation resistance. The atomic layer deposition was then adopted to prepare Al _2 O _3 /TiO _2 NMLs with period thickness of 15, 7.5 and 3 nm on the surface of Al _2 O _3 layer, which not only cover the defects, but also utilize interfaces to suppress hydrogen isotopes permeation. The composite coating sample with the period thickness of 3 nm showed great enhancement of two orders of magnitude in deuterium permeation resistance property compared to the original FeAl/Al _2 O _3 TPB coating at 500 °C, and the permeation reduction factor reaches a high value of 5 × 10 ^5 , which far above the requirements of future fusion reactors. |
| format | Article |
| id | doaj-art-bc5ed5e2db074228afb8d5718237c9e4 |
| institution | Directory of Open Access Journals |
| issn | 0029-5515 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| spelling | doaj-art-bc5ed5e2db074228afb8d5718237c9e42025-08-20T02:49:36ZengIOP PublishingNuclear Fusion0029-55152024-01-0165101606110.1088/1741-4326/ad9b37Preparing Al2O3/TiO2 nano-multilayers on the surface of FeAl/Al2O3 coating as tritium permeation barrierEnkai Guo0Yifu He1Fen Zhong2Bowen Fu3Kun Wang4Guangxu Cai5Changzhong Jiang6Feng Ren7https://orcid.org/0000-0002-9557-5995School of Physics and Technology, Center for Ion Beam Application, and Hubei Nuclear Solid Physics Key Laboratory, Wuhan University , Wuhan 430072, ChinaSchool of Physics and Technology, Center for Ion Beam Application, and Hubei Nuclear Solid Physics Key Laboratory, Wuhan University , Wuhan 430072, ChinaSchool of Physics and Technology, Center for Ion Beam Application, and Hubei Nuclear Solid Physics Key Laboratory, Wuhan University , Wuhan 430072, ChinaSchool of Physics and Technology, Center for Ion Beam Application, and Hubei Nuclear Solid Physics Key Laboratory, Wuhan University , Wuhan 430072, ChinaSchool of Physics and Technology, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University , Wuhan 430072, ChinaSchool of Physics and Technology, Center for Ion Beam Application, and Hubei Nuclear Solid Physics Key Laboratory, Wuhan University , Wuhan 430072, ChinaSchool of Physics and Technology, Center for Ion Beam Application, and Hubei Nuclear Solid Physics Key Laboratory, Wuhan University , Wuhan 430072, ChinaSchool of Physics and Technology, Center for Ion Beam Application, and Hubei Nuclear Solid Physics Key Laboratory, Wuhan University , Wuhan 430072, China; Center for Electron Microscopy, and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University , Wuhan 430072, ChinaPreparing tritium permeation barrier (TPB) coating on the surface of structural materials can effectively alleviate tritium permeation in fusion reactor system. However, due to the existence of inevitable certain number of defects in TPB, there is still a gap between the commonly prepared TPB coatings and the requirements proposed by fusion reactors. In this work, composite coatings with Al _2 O _3 /TiO _2 nano-multilayers (NMLs) covering on the surface of FeAl/Al _2 O _3 coating were prepared as TPB. The FeAl/Al _2 O _3 TPB coating on the surface of 316L stainless steel was prepared by electrochemical deposition of Al, aluminization and in-situ oxidation. Due to the aggregation of Cr, there are micro sized defects in the Al _2 O _3 layer. The presence of defects seriously reduces its hydrogen isotopes permeation resistance. The atomic layer deposition was then adopted to prepare Al _2 O _3 /TiO _2 NMLs with period thickness of 15, 7.5 and 3 nm on the surface of Al _2 O _3 layer, which not only cover the defects, but also utilize interfaces to suppress hydrogen isotopes permeation. The composite coating sample with the period thickness of 3 nm showed great enhancement of two orders of magnitude in deuterium permeation resistance property compared to the original FeAl/Al _2 O _3 TPB coating at 500 °C, and the permeation reduction factor reaches a high value of 5 × 10 ^5 , which far above the requirements of future fusion reactors.https://doi.org/10.1088/1741-4326/ad9b37Tritium permeation barrierFeAl/Al2O3 coatingAl2O3/TiO2 nano-multilayersinterfaces |
| spellingShingle | Enkai Guo Yifu He Fen Zhong Bowen Fu Kun Wang Guangxu Cai Changzhong Jiang Feng Ren Preparing Al2O3/TiO2 nano-multilayers on the surface of FeAl/Al2O3 coating as tritium permeation barrier Tritium permeation barrier FeAl/Al2O3 coating Al2O3/TiO2 nano-multilayers interfaces |
| title | Preparing Al2O3/TiO2 nano-multilayers on the surface of FeAl/Al2O3 coating as tritium permeation barrier |
| title_full | Preparing Al2O3/TiO2 nano-multilayers on the surface of FeAl/Al2O3 coating as tritium permeation barrier |
| title_fullStr | Preparing Al2O3/TiO2 nano-multilayers on the surface of FeAl/Al2O3 coating as tritium permeation barrier |
| title_full_unstemmed | Preparing Al2O3/TiO2 nano-multilayers on the surface of FeAl/Al2O3 coating as tritium permeation barrier |
| title_short | Preparing Al2O3/TiO2 nano-multilayers on the surface of FeAl/Al2O3 coating as tritium permeation barrier |
| title_sort | preparing al2o3 tio2 nano multilayers on the surface of feal al2o3 coating as tritium permeation barrier |
| topic | Tritium permeation barrier FeAl/Al2O3 coating Al2O3/TiO2 nano-multilayers interfaces |
| url | https://doi.org/10.1088/1741-4326/ad9b37 |
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