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Hot-corrosion resistance and phase stability of Yb2O3–Gd2O3–Y2O3 costabilized zirconia-based thermal barrier coatings against Na2SO4 + V2O5 molten salts
- Authors
- Song, Dowon; Song, Taeseup; Paik, Ungyu; Lyu, Guanlin; Kim, Junseong; Yang, SeungCheol; Jung, Yeon-Gil
- Issue Date
- Oct-2020
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Hot corrosion; Rare-earth element; Thermal barrier coatings (TBC); Reaction mechanism
- Citation
- SURFACE & COATINGS TECHNOLOGY, v.400, pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- SURFACE & COATINGS TECHNOLOGY
- Volume
- 400
- Start Page
- 1
- End Page
- 7
- ISSN
- 0257-8972
- Abstract
- The hot corrosion behavior of plasma-sprayed Yb2O3-Gd2O3-Y2O3 co-doped ZrO2 (YGYZ) coating against Na2SO4 + V2O5 molten salts was investigated and its detailed hot corrosion mechanism was suggested. The chemical reactivity order between the stabilizers was proposed based on the electronic structure and Lewis acid-base mechanism. After hot corrosion, the YGYZ coating exhibited the maintenance of tetragonality ratio and relatively lower extent of destabilization less than 40% of conventional yttria-stabilized ZrO2 coating. These great chemical and phase stabilities imply that YGYZ is promising candidate for high-temperature thermal barrier material.
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Related Researcher
- Song, Taeseup
- COLLEGE OF ENGINEERING (DEPARTMENT OF ENERGY ENGINEERING)