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Long-life Thermal Barrier Coatings (TBC) For High Temperature Applications


Applications—Gas turbine efficiency can be improved by maximizing inlet temperature and/or reducing the amount of cooling air required for airfoils. In order to enable the highest temperatures while protecting super alloy substrates thermal barrier coatings (TBCs) are used. Grant applications are sought to develop materials and methodologies that advance the state-of-the-art and address new ceramic top coat and metallic bond coat chemistries for long-life TBC systems capable of operating at temperatures greater than currently available 8YSZ TBC systems. Approaches of interest include, but are not limited to:

  • Develop new ceramic top coat chemistries to: (a) lower the thermal conductivity of the ceramic material; (b) increase the erosion resistance of the ceramic top coat; and (c) minimize the degree of sintering of the ceramic at high temperatures. The new ceramic top coat chemistry shall also remain phase-stable at high  temperatures.
  • Develop new metallic bond coat chemistries to improve the oxidation resistance of the bond coat at high temperatures and increase the spallation resistance of the  TBC system.
  • Develop multi-layer top coats and/or bond coats to produce a complete TBC system capable of meeting design requirements for high temperature applications.  Deposited TBC microstructures shall demonstrate acceptable levels of strain tolerance to resist cracking and spallation during high temperature service.

Questions – contact Patcharin (Rin) Burke,

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