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| Abstract No.: |
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| Title: |
Corrosion resistant ceramic coatings against high temperature LiCl-LiO2 molten salts
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| Authors: |
Kyeong Baik / Department of Nanomaterials,
Chungnam National University, Korea
Ho-Young Lee / Chungnam National University, Korea
Jong-Hyun Lee/ Korea Atomic Energy Research Institute, Korea
Eung-Ho Kim/ Korea Atomic Energy Research Institute, Korea
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| Abstract: |
Plasma sprayed oxide ceramic coatings are promising candidates for environmental barrier coating systems against LiCl-LiO2 molten salt. In this study, five different oxide coatings have been deposited onto a bond coated Ni-alloy by atmospheric plasma spraying, and the characteristics of coatings have been evaluated in terms of micorstructural features and corrosion resistance. All oxide coatings were chemically reacted with molten salt, and formed a thick reaction layer of ~10mm after 168h immersion. Splat boundaries acted as a main path for penetrating liquidus and/or gaseous salt, reaction products were formed along the porous channels. The corrosion resistance of oxide coatings was such that ZrO2, Al2O3-Y2O3>Al2O3>Al2O3-ZrO2>Y2O3.
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