Phase composition and microstructural responses of graded mullite/YSZ coatings under water vapor environments

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DOIResolve DOI: http://doi.org/10.1007/s11666-010-9589-6
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TypeArticle
Journal titleJournal of Thermal Spray Technology
ISSN1059-9630
Volume20
Issue1-Feb
Pages8391; # of pages: 9
SubjectEnvironmental barrier coatings; graded mullite/ZrO <sub>2</sub>; Layered coatings; plasma spray; water vapor corrosion; Corrosion; Plasma jets; Plasma spraying; Protective coatings; Silicate minerals; Silicon carbide; Thermal aging; Water vapor
AbstractMullite-based systems have been considered as environmental barrier coatings (EBCs) for high temperature protection of Si-based ceramic (Si 3N 4, SiC) substrates against water vapor corrosion, for application in forthcoming turbine engines. Graded mullite/Y-ZrO 2 composites plasma sprayed over Hexoloy SiC substrates were analyzed as EBCs. All feedstock materials were purposely prepared and singular spraying conditions were used to assure superior crystallization. The different coated specimens were subjected to temperatures of 1300 °C for 100-500 h under water vapor environment. The effect of water corrosion on the exposed coatings was investigated by focusing on their phase and microstructure changes. © 2010 ASM International.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21271638
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Record identifieref4bd345-5930-4238-94bc-47655003bdf1
Record created2014-03-24
Record modified2016-05-09
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