Characterization of Chemical Vapor-Deposited (CVD) Mullite+CVD Alumina+Plasma-Sprayed Tantalum Oxide Coatings on Silicon Nitride Vanes After an Industrial Gas Turbine Engine Field Test
| Autor: | M. K. Ferber, S. M. Zemskova, James A Haynes, W. Westphal, H. T. Lin |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Metallurgy technology industry and agriculture Mullite Chemical vapor deposition Aluminium silicate engineering.material equipment and supplies Microstructure Evaporation (deposition) chemistry.chemical_compound Coating Silicon nitride chemistry visual_art Materials Chemistry Ceramics and Composites engineering visual_art.visual_art_medium cardiovascular diseases Ceramic |
| Zdroj: | Journal of the American Ceramic Society. 89:3560-3563 |
| ISSN: | 1551-2916 0002-7820 |
| DOI: | 10.1111/j.1551-2916.2006.01256.x |
| Popis: | Silicon nitride ceramic vanes coated with chemical vapor-deposited (CVD) mullite, CVD alumina, and plasma-sprayed tantalum oxide were exposed to field tests in an industrial gas turbine engine. Results varied due to expected non-uniformities in the CVD coating microstructures, but dense CVD mullite/alumina showed excellent stability and protective capacity after 1148 h of engine testing. Surfaces without CVD coatings experienced massive intragranular subsurface oxidation and/or rapid recession of the ceramic substrate due to volatilization of silica species formed by oxidation. These results suggest that thin ( |
| Databáze: | OpenAIRE |
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