期刊
CORROSION SCIENCE
卷 158, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.108094
关键词
Scandia doped yittria stabilized zirconia; Phase stability; Hot corrosion; Sulfate and vanadate molten salts; Mechanism
资金
- Guangxi Natural Science Foundation [2018GXNSFAA281176, 2016GXNSFAA380214]
- National Natural Science Foundation of China [51361003]
- Youth Foundation of Guangxi Key Laboratory of Processing for Non -Ferrous Metals and Featured Materials [GXYSYF1801]
- Incubation Programme for thousands of Youth backbone teachers for Guangxi institution of higher educations
The effect of Sc2O3 content on the hot corrosion behavior of x mol.% Sc(2)O(3-)1.5 mol.% Y2O3 co-doped ZrO2 ceramics (ScYSZ) in Na2SO4 + V2O5 (50/50 wt.%) molten salts at 1000 degrees C was investigated. The experiments revealed that the hot corrosion resistance and phase stability of the ScYSZ ceramics increase with the Sc2O3 content as results of the enhanced strength of rare earth-oxygen bond and the increased prohibition effect on the vanadate penetration due to the small ionic radius of Sc3+ and the weak reactivity of Sc2O3 with vanadates. The hot corrosion mechanism was also discussed.
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