Recent Progress Addressing Compatibility Issues Relevant to Fusion Environments
- Oak Ridge National Laboratory (United States)
Current compatibility research in the U.S. focuses on two topics: dual- or multi-layer electrically-resistant Y{sub 2}O{sub 3}/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{sub 2}O{sub 3} coatings after exposure to Li shows significant changes in the microstructure. Initial static capsule results for V-4Cr-4Ti alloys in Li at 800 deg. 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 deg. C and only limited wetting after 1000h at 1100 deg. C. Chemical analysis of the Pb-Li after the tests did not detect Si to the detectability limit of 30ppma (5wppm). In both liquid metal systems, loop tests with a representative temperature gradient are needed to truly determine compatibility limits.
- OSTI ID:
- 20854014
- Journal Information:
- Fusion Science and Technology, Vol. 47, Issue 4; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); ISSN 1536-1055
- Country of Publication:
- United States
- Language:
- English
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