Abstract
Corrosion of SiC-fiber reinforced SiC matrix composites in 2LiF-BeF2 molten salt was examined following static molten salt exposure for 1000 h at 650 and 750 °C. Composites were fabricated with either Tyranno SA3 or Hi-Nicalon type-S fibers and a chemical vapor infiltration SiC matrix. Both composites showed minimal weight loss after salt exposure and maintained shape. Corrosion was characterized by comprehensive electron microscopy and Raman spectroscopy. Based on the results of experimental and thermodynamic analysis, a corrosion mechanism for SiC/SiC is proposed where both the salt and SiC materials play a key role in the phase stability of the composite.
| Original language | English |
|---|---|
| Article number | 112635 |
| Journal | Corrosion Science |
| Volume | 244 |
| DOIs | |
| State | Published - Mar 2025 |
Funding
Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). The authors would like to acknowledge the assistance of Alan Frederick at ORNL with the corrosion test. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The research described was funded by US Department of Energy, Office of Nuclear Energy and Office of Fusion Energy Sciences.
Keywords
- CMC
- Corrosion
- Molten Salt
- SiC/SiC