Hydration Tolerant, low Thermal Conductivity (K) Thermal Barrier Coatings

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-12-M-2279
Agency Tracking Number: F121-175-0149
Amount: $150,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2012
Solicitation Year: 2012
Solicitation Topic Code: AF121-175
Solicitation Number: 2012.1
Small Business Information
4401 Dayton-Xenia Road, Dayton, OH, -
DUNS: 074689217
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 HeeDong Lee
 Principal Investigator
 (937) 426-6900
Business Contact
 Rick Weddle
Title: Director, Contracts
Phone: (937) 426-6900
Email: rweddle@ues.com
Research Institution
ABSTRACT: This Small Business Innovation Research Phase I project seeks to develop a new diffusion barrier layer that allows for a hydration tolerant thermal barrier coating (TBC) system, along with an outstanding oxidation resistance of the bond-coat. TBCs have been applied to the hot sections of aircraft turbine engines to increase engine efficiency and to extend the life of metal components; however, they have not been fully integrated to the engine design due to the potential catastrophic failures at the interfaces where crack formation takes place. Moreover, the state-of-the TBC system seems vulnerable to moisture, leading to spallation of the top TBC layer, termed moisture-induced delayed spallation (MIDS). Due to this fact, current efforts are focused on developing new alloys or barrier coatings, but only minimal advancements have been achieved. We propose the development of new barrier coatings based on yttrium aluminates. The project is composed of the development of a robust coating process and experimental verification of water and oxidation resistance, as well as chemical inertness. BENEFIT: TBCs are used for the aircraft engines but are currently limited by unpredictable lifetimes and poor reliability. A new diffusion barrier coating based on yttrium aluminates could significantly reduce the adverse effects of water, such as moisture-induced delayed spallation (MIDS), as well as TGO growth. The reliability and life of the TBC can be improved, and full incorporation into commercial engines will be expected.

* Information listed above is at the time of submission. *

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