|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors VII
||Corrosion of SiC with Cr, CrN, and TiN Coatings in High Temperature Water
||Stephen S. Raiman, Peter Doyle, Caen Ang, Kurt A Terrani
|On-Site Speaker (Planned)
||Stephen S. Raiman
SiC/SiC ceramic matrix composite (CMC) materials are an attractive accident tolerant fuel (ATF) cladding candidate. However, the high dissolution rate of SiC/SiC CMCs in light water reactor (LWR) coolant indicates a need for environmental barrier coatings.
For this study, candidate coatings were applied to SiC substrates, and exposed for up to 600h in high temperature water (288-320°C) with added hydrogen or oxygen to mimic LWR conditions. Samples were weighed for mass change, and examined with light microscopy, electron microscopy and Raman spectroscopy. Samples coated with Cr and CrN experienced less mass loss compared to uncoated SiC. TiN coated samples gained mass due to oxide formation, and exhibited the greatest mass gain in BWR normal water chemistry. This work discusses how these findings affect the suitability of the coatings for use in ATF.
This work was funded by U.S. Department of Energy’s Office of Nuclear Energy, Advanced Fuel Campaign.
||Planned: Supplemental Proceedings volume