Hot-corrosion resistance and phase stability of Yb2O3-Gd2O3-Y2O3 costabilized zirconia-based thermal barrier coatings against Na2SO4 + V2O5 molten salts
- Title
- Hot-corrosion resistance and phase stability of Yb2O3-Gd2O3-Y2O3 costabilized zirconia-based thermal barrier coatings against Na2SO4 + V2O5 molten salts
- Author
- 송태섭
- Keywords
- Hot corrosion; Rare-earth element; Thermal barrier coatings (TBC); Reaction mechanism
- Issue Date
- 2020-10
- Publisher
- ELSEVIER SCIENCE SA
- Citation
- SURFACE & COATINGS TECHNOLOGY, v. 400, article no. 126197
- 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.
- URI
- https://www.sciencedirect.com/science/article/pii/S0257897220308665?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/171163
- ISSN
- 0257-8972
- DOI
- 10.1016/j.surfcoat.2020.126197
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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