Corrosion characteristics of silicon carbide fiber-reinforced composites in beryllium-bearing molten fluoride salt

Lamm, Benjamin W.; Koyanagi, Takaaki; Lee, Jo Jo; Keiser, James R.; Gietl, Hanns; Katoh, Yutai

doi:10.1016/j.corsci.2024.112635

Title: Corrosion characteristics of silicon carbide fiber-reinforced composites in beryllium-bearing molten fluoride salt

Journal Article · 14 December 2024 · Corrosion Science

DOI: https://doi.org/10.1016/j.corsci.2024.112635 · OSTI ID:2483428

Lamm, Benjamin W. ^[1]; Koyanagi, Takaaki ^[1];

^[1]; Keiser, James R. ^[1];

^[2]; Katoh, Yutai ^[1]

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Idaho National Laboratory (INL), Idaho Falls, ID (United States)

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. In conclusion, 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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2483428

Journal Information:: Corrosion Science, Journal Name: Corrosion Science Vol. 244; ISSN 0010-938X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Corrosion characteristics of silicon carbide fiber-reinforced composites in beryllium-bearing molten fluoride salt

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