CaO-MgO-Al2O3-SiO2 (CMAS) corrosion of Gd2Zr2O7 and Sm2Zr2O7
Abstract
Ceramic thermal barrier coatings are applied to superalloys used in gas turbine engineering to increase the operating temperature and the energy conversion efficiency. However, dust consisting of CaO-MgO-Al2O3-SiO2 (CMAS) from the air can be injected into the engines and corrode the thermal barrier coatings. Lanthanide zirconates are promising materials in thermal barrier coatings due to their low thermal conductivities, good phase stability and good corrosion resistance. However, the corrosion resistance mechanism of CMAS on lanthanide zirconates is still not clearly understood. In this work, the corrosion mechanism of Gd2Zr2O7 and Sm2Zr2O7 in CMAS is studied. Here, the results show that the CMAS can easily react with lanthanide zirconate thermal barrier coatings to form a dense layer, which can resist further corrosion
- Authors:
-
- Auburn Univ., Auburn, AL (United States)
- Publication Date:
- Research Org.:
- Auburn Univ., AL (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE), Clean Coal and Carbon Management
- OSTI Identifier:
- 1289513
- Grant/Contract Number:
- FE0011245
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 163; Journal Issue: 10; Journal ID: ISSN 0013-4651
- Publisher:
- The Electrochemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Wang, Honglong, Bakal, Ahmet, Zhang, Xingxing, Tarwater, Emily, Sheng, Zhizhi, and Fergus, Jeffrey W. CaO-MgO-Al2O3-SiO2 (CMAS) corrosion of Gd2Zr2O7 and Sm2Zr2O7. United States: N. p., 2016.
Web. doi:10.1149/2.0301610jes.
Wang, Honglong, Bakal, Ahmet, Zhang, Xingxing, Tarwater, Emily, Sheng, Zhizhi, & Fergus, Jeffrey W. CaO-MgO-Al2O3-SiO2 (CMAS) corrosion of Gd2Zr2O7 and Sm2Zr2O7. United States. https://doi.org/10.1149/2.0301610jes
Wang, Honglong, Bakal, Ahmet, Zhang, Xingxing, Tarwater, Emily, Sheng, Zhizhi, and Fergus, Jeffrey W. Mon .
"CaO-MgO-Al2O3-SiO2 (CMAS) corrosion of Gd2Zr2O7 and Sm2Zr2O7". United States. https://doi.org/10.1149/2.0301610jes. https://www.osti.gov/servlets/purl/1289513.
@article{osti_1289513,
title = {CaO-MgO-Al2O3-SiO2 (CMAS) corrosion of Gd2Zr2O7 and Sm2Zr2O7},
author = {Wang, Honglong and Bakal, Ahmet and Zhang, Xingxing and Tarwater, Emily and Sheng, Zhizhi and Fergus, Jeffrey W.},
abstractNote = {Ceramic thermal barrier coatings are applied to superalloys used in gas turbine engineering to increase the operating temperature and the energy conversion efficiency. However, dust consisting of CaO-MgO-Al2O3-SiO2 (CMAS) from the air can be injected into the engines and corrode the thermal barrier coatings. Lanthanide zirconates are promising materials in thermal barrier coatings due to their low thermal conductivities, good phase stability and good corrosion resistance. However, the corrosion resistance mechanism of CMAS on lanthanide zirconates is still not clearly understood. In this work, the corrosion mechanism of Gd2Zr2O7 and Sm2Zr2O7 in CMAS is studied. Here, the results show that the CMAS can easily react with lanthanide zirconate thermal barrier coatings to form a dense layer, which can resist further corrosion},
doi = {10.1149/2.0301610jes},
journal = {Journal of the Electrochemical Society},
number = 10,
volume = 163,
place = {United States},
year = {Mon Aug 08 00:00:00 EDT 2016},
month = {Mon Aug 08 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
A novel CMAS‐resistant material based on thermodynamic equilibrium design: Apatite‐type Gd 10 (SiO 4 ) 6 O 3
journal, January 2020
- Wu, Di; Zhang, Han; Shan, Xiao
- Journal of the American Ceramic Society, Vol. 103, Issue 5