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Development of electrically insulating coatings on vanadium alloys for lithium-cooled blankets*

D.L Smith, K Natesan, J.-H Park, C.B Reed, R.F Mattas2000年Fusion Engineering and DesignIF 1.7出版社

AbstractThe self-cooled lithium blanket concept with a vanadium structure offers a potential for high performance with attractive safety and environmental features. Based on blanket design studies, it became apparent that electrically insulating duct walls would be required to reduce the magnetohydrodynamic (MHD) pressure drop for liquid metal-cooled blankets for high magnetic field fusion devices. As a result, development of insulator coatings was recommended as the most appropriate approach for resolving this issue. Oxides such as CaO, Y2O3. BeO. MgO, MgAl2O4, and Y3Al2O12 and nitrides such as AlN, BN and Si3N2 were initially considered potential candidate coating materials. Based on results of scoping studies, CaO and AlN have been selected as primary candidates for further development. Progress on the development of CaO and AlN coatings, including in-situ formation and electrical properties measurements, are summarized in this paper.

日本語訳

要約自己冷却型リチウムブランケット概念は、バナジウム構造を有し、魅力的な安全性と環境特性を備えた高性能の可能性を提供する。ブランケット設計研究に基づき、高磁場核融合装置用の液体金属冷却ブランケットにおける磁気流体力学(MHD)圧力損失を低減するために、電気絶縁性ダクト壁が必要となることが明らかになった。その結果、この問題を解決するための最も適切なアプローチとして、絶縁体コーティングの開発が推奨された。CaO、Y2O3、BeO、MgO、MgAl2O4、Y3Al2O12などの酸化物や、AlN、BN、Si3N2などの窒化物が、当初、潜在的な候補コーティング材料として検討された。予備調査の結果に基づき、CaOとAlNがさらなる開発のための主要候補として選定された。本論文では、CaOおよびAlNコーティングの開発における進捗、すなわちその場形成と電気特性測定を含めて、要約する。

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