Recent progress addressing compatibility issues relevant to fusion environments

B. A. Pint; K. L. More; H. M. Meyer; J. R. Distefano

doi:10.13182/FST05-A792

Recent progress addressing compatibility issues relevant to fusion environments

B. A. Pint, K. L. More, H. M. Meyer, J. R. Distefano

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18 Scopus citations

Abstract

Current compatibility research in the U.S. focuses on two topics: dual- or multi-layer electrically-resistant Y₂O₃/vanadium coatings in a V-Li blanket concept and SiC composites with a Pb-Li coolant. The compatibility issue for multi-layer coatings includes the ceramic insulating layer and the metallic vanadium alloy layer. Characterization of Y ₂O₃ coatings after exposure to Li shows significant changes in the microstructure. Initial static capsule results for V-4Cr-4Ti alloys in Li at 800°C showed unexpected small mass gains. Capsule tests of monolithic SiC in Pb-17Li showed no mass change and no wetting after 1000h at 800°C and only limited wetting after 1000h at 1100°C. Chemical analysis of the Pb-Li after the tests did not detect Si to the detectability limit of 30ppma (Swppm). In both liquid metal systems, loop tests with a representative temperature gradient are needed to truly determine compatibility limits.

Original language	English
Pages (from-to)	851-855
Number of pages	5
Journal	Fusion Science and Technology
Volume	47
Issue number	4
DOIs	https://doi.org/10.13182/FST05-A792
State	Published - May 2005

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abstract = "Current compatibility research in the U.S. focuses on two topics: dual- or multi-layer electrically-resistant Y2O3/vanadium coatings in a V-Li blanket concept and SiC composites with a Pb-Li coolant. The compatibility issue for multi-layer coatings includes the ceramic insulating layer and the metallic vanadium alloy layer. Characterization of Y 2O3 coatings after exposure to Li shows significant changes in the microstructure. Initial static capsule results for V-4Cr-4Ti alloys in Li at 800°C showed unexpected small mass gains. Capsule tests of monolithic SiC in Pb-17Li showed no mass change and no wetting after 1000h at 800°C and only limited wetting after 1000h at 1100°C. Chemical analysis of the Pb-Li after the tests did not detect Si to the detectability limit of 30ppma (Swppm). In both liquid metal systems, loop tests with a representative temperature gradient are needed to truly determine compatibility limits.",

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AU - More, K. L.

AU - Meyer, H. M.

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Recent progress addressing compatibility issues relevant to fusion environments

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