Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 34, Issue 15, Pages 3917-3924Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2014.05.026
Keywords
SrZrO3; Rare-earth oxides; Hot corrosion; Thermal barrier coatings
Categories
Funding
- National Natural Science Foundation of China [51062012, 51062013]
- Program for New Century Excellent Talents in University [NCET-11-1017]
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The hot corrosion behaviors of Sr(Y0.05Yb0.05Zr0.9)O-2.95 (SYYZ) ceramic were investigated in Na2SO4, V2O5, and Na2SO4 + V2O5 salts mixture, respectively. Na2SO4 did not react with SYYZ ceramic at 900, 950 and 1000 degrees C. m-ZrO2, YVO4 and YbVO4 were the main corrosion products on the SYYZ ceramic surface in V2O5 at 800 and 900 degrees C, whereas Sr3V2O8 and t-ZrO2 appeared at 1000 degrees C. In Na2SO4 + V2O5 salts mixture, the corrosion products were Sr3V2O8 and t-ZrO2 at 800 and 900 degrees C on the SYYZ ceramic surface, however, a new phase of SrZrO3 developed at 1000 degrees C. The phase transformation and chemical interaction are the primary corrosion mechanisms for degradation of SYYZ ceramic. (C) 2014 Elsevier Ltd. All rights reserved.
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