Journal
SCRIPTA MATERIALIA
Volume 168, Issue -, Pages 47-50Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.04.018
Keywords
Rare earth silicates; Equiatomic quaternary solid solution; Multifunctional thermal and environmental barrier coating; Property modification
Categories
Funding
- National Key R&D Program of China [2017YFB0703201]
- National Natural Science Foundation of China [51772302]
- International Cooperation Key Program [174321KYSB20180008]
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Equiatomic quaternary (Y1/4Ho1/4Er1/4Yb1/4)(2)SiO5 solid solution is investigated as a multifunctional thermal and environmental barrier coating (TEBC) material in this work. Dense and pure materials were prepared by hot pressing method, and the compositional homogeneity at macroscale and atomic scale were confirmed by electron-dispersive spectrometer elemental mapping and high-angle annular dark-field images. The quatemary solid solution displays balanced optimal properties on Young's modulus, thermal conductivity, thermal expansion, and high temperature water vapor resistance. The moderate cocktail effects also provide suggestions on the design of rare earth monosilicate TEBC materials. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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