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张高伟,韩文妥,万发荣.Li/V包层MHD绝缘涂层的研究现状与展望[J].稀有金属材料与工程(英文),2019,48(1):348~356.[Zhang Gaowei,Han Wentuo and Wan Farong.Progress and prospect in the development of electrically insulating coatingsfor Li/V self-cooled blanket[J].Rare Metal Materials and Engineering,2019,48(1):348~356.]
Progress and prospect in the development of electrically insulating coatingsfor Li/V self-cooled blanket
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Received:May 25, 2017  Revised:July 20, 2017
Key words: Li/V self-cooled blanket  MHD pressure drop  Insulating coating  AlN multilayer insulating coating
Foundation item:国家磁约束核聚变能发展专项资助(项目号2014GB120000)
Author NameAffiliation
Zhang Gaowei,Han Wentuo and Wan Farong  
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      Applying an electrically insulating coating on the inner surface of the lithium flowing ducts is a feasible way to effectively mitigate the MHD pressure drop for Li/V self-cooled blanket. This paper mainly overviews the present progress and issues of the insulating coatings, including the single-layer insulator and the multilayer insulatos. Many studies have showed that the single-layer insulator does not perform as stablely as theoretically especially at elevated temperatures, so the necessary of development of the multilayer insulators has been stressed. However, the currently investigated “V-alloy/insulator/metal” structured multilayer insulting coating (such as V-alloy/Er2O3/V) exists some obvious weaknesses, such as the difficulty in realizing the in situ formation and self-healing of the surface metal layer, the compatability problem between lithium and the surface metal layer. Then a new V-alloy/metal/insulator structured multilayer insulator is proposed, which has the potential to realize the in situ formation and self-healing and probably a new possibility for the development of the insulating coating.