Compatibility of V/Y2O3/V-4Cr-4Ti Coatings with Liquid Flowing Li
Conference
·
OSTI ID:1049816
- ORNL
Characterization was performed on two-layer V/Y2O3 coatings deposited on V-4Cr-4Ti and exposed to Li in a thermal convection loop at 400 -700 C for 2,350h. The coatings exposed at lower temperatures ( 504 C) showed adequate electrical resistivity at 500 C in vacuum after exposure and the morphology of the Y2O3 layer was unchanged. XPS and EELS analysis showed no indication of Li penetration to the oxide layer after exposure at 437 C. However, coatings exposed at higher temperatures ( 565 C) showed higher conductivity after exposure and a change in the Y2O3 grain morphology was apparent using TEM. At the highest temperature, a continuous layer of recrystallized oxide grains was observed adjacent to the substrate suggesting that a reaction occurred between Y2O3 and V-4Cr-4Ti rather than Li infiltration. However, no layer formed during a 2,350h anneal at 700 C of an unexposed coating.
- Research Organization:
- Oak Ridge National Laboratory (ORNL); Shared Research Equipment Collaborative Research Center
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1049816
- Country of Publication:
- United States
- Language:
- English
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