Compatibility of multi-layer, electrically insulating coatings for vanadium-lithium blankets

B. A. Pint; J. L. Moser; A. Jankowski; J. Hayes

doi:10.1016/j.jnucmat.2007.03.208

Compatibility of multi-layer, electrically insulating coatings for vanadium-lithium blankets

B. A. Pint, J. L. Moser, A. Jankowski, J. Hayes

Materials Science and Technology Div

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

The objective of this work is to demonstrate that a multi-layer, electrically insulating coating will acceptably reduce the magneto hydrodynamic (MHD) pressure losses in a lithium-cooled blanket. Coatings of Er₂O₃ or Y₂O₃ with an overlying coating of vanadium have been fabricated by physical vapor deposition. Coatings have demonstrated acceptable as-received resistivity at 800 °C in vacuum and at 600 °C in contact with Li. When the Y₂O₃ coating was completely covered with a 10 μm vanadium layer, it survived exposure to Li for 100 h at 800 °C without degradation. The interaction between V alloys and Li at ≤800 °C is now the critical compatibility issue and a loop test is being constructed. New ceramic materials based on the Y-Ti-O system also are being explored.

Original language	English
Pages (from-to)	1165-1169
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	367-370 B
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jnucmat.2007.03.208
State	Published - Aug 1 2007

Funding

The research was sponsored by the Office of Fusion Energy Sciences, US Department of Energy (DOE), under contract DE-AC05-00OR22725 with UT-Battelle, LLC and the JUPITER-II Japan–US collaboration on fusion blanket systems and materials. K.S. Trent and K.L. More assisted with the FIB work. J.R. DiStefano, P.F. Tortorelli and S.J. Zinkle provided comments on the manuscript.

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
Fusion Energy Sciences

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10.1016/j.jnucmat.2007.03.208

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abstract = "The objective of this work is to demonstrate that a multi-layer, electrically insulating coating will acceptably reduce the magneto hydrodynamic (MHD) pressure losses in a lithium-cooled blanket. Coatings of Er2O3 or Y2O3 with an overlying coating of vanadium have been fabricated by physical vapor deposition. Coatings have demonstrated acceptable as-received resistivity at 800 °C in vacuum and at 600 °C in contact with Li. When the Y2O3 coating was completely covered with a 10 μm vanadium layer, it survived exposure to Li for 100 h at 800 °C without degradation. The interaction between V alloys and Li at ≤800 °C is now the critical compatibility issue and a loop test is being constructed. New ceramic materials based on the Y-Ti-O system also are being explored.",

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AB - The objective of this work is to demonstrate that a multi-layer, electrically insulating coating will acceptably reduce the magneto hydrodynamic (MHD) pressure losses in a lithium-cooled blanket. Coatings of Er2O3 or Y2O3 with an overlying coating of vanadium have been fabricated by physical vapor deposition. Coatings have demonstrated acceptable as-received resistivity at 800 °C in vacuum and at 600 °C in contact with Li. When the Y2O3 coating was completely covered with a 10 μm vanadium layer, it survived exposure to Li for 100 h at 800 °C without degradation. The interaction between V alloys and Li at ≤800 °C is now the critical compatibility issue and a loop test is being constructed. New ceramic materials based on the Y-Ti-O system also are being explored.

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Compatibility of multi-layer, electrically insulating coatings for vanadium-lithium blankets

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