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Development and Evaluation of Environmental Barrier Coatings for Si-Based Ceramics

[+] Author Affiliations
Tania Bhatia, Venkat Vedula, Harry Eaton, Ellen Sun, John Holowczak, Gary Linsey

United Technologies Research Center, East Hartford, CT

Paper No. GT2004-54092, pp. 431-438; 8 pages
doi:10.1115/GT2004-54092
From:
  • ASME Turbo Expo 2004: Power for Land, Sea, and Air
  • Volume 2: Turbo Expo 2004
  • Vienna, Austria, June 14–17, 2004
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4167-7 | eISBN: 0-7918-3739-4
  • Copyright © 2004 by ASME

abstract

Environmental barrier coatings (EBCs) are being developed for silicon carbide (SiC) based composites and monolithic silicon nitride (Si3 N4 ) to protect against the accelerated oxidation and subsequent silica volatilization in high temperature, high-pressure steam environments encountered in gas turbine engines. While EBCs for silicon carbide (EBCSiC ) have been demonstrated in combustor liner applications, efforts are ongoing in the development of EBC systems for silicon nitride (EBCSiN ). The challenges of adapting EBCSiC to monolithic Si3 N4 are discussed in this paper. Progress in the area of EBCSiN including development and performance during field tests and tests simulating engine conditions are reviewed.

Copyright © 2004 by ASME
Topics: Coatings , Ceramics

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