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Progress and prospect in the development of electrically insulating coatingsfor Li/V self-cooled blanket
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University of Science and Technology Beijing

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    Abstract:

    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.

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[Zhang Gaowei, Han Wentuo, 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.]
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History
  • Received:May 25,2017
  • Revised:July 20,2017
  • Adopted:August 18,2017
  • Online: February 18,2019
  • Published: