Thermal Barrier Coating Life Determination

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$748,820.00
Award Year:
2006
Program:
SBIR
Phase:
Phase II
Contract:
FA8650-06-C-2614
Award Id:
73056
Agency Tracking Number:
F051-179-2609
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
5555 Northwest Parkway, San Antonio, TX, 78249
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
154564306
Principal Investigator:
MadhavraoGovindaraju
Senior Research Engineer
(210) 582-3312
rao@karta.com
Business Contact:
SusanWright
Director, Contracts & Pro
(210) 582-3252
swright@karta.com
Research Institute:
n/a
Abstract
Durability of Thermal Barrier Coatings (TBCs) used in gas-turbine engines to thermally protect metal components such as turbine blades from hot combustion gases is a major concern to the aerospace industry and in particular the Air Force. The objective of this project is to develop an analytical approach to determining remaining durable life of thermal barrier coated engine components using Nondestructive Inspection data input. In Phase I, Karta identified oxidation of bond coat as a dominant factor leading to TBC failure. Determining the thickness of the thermally grown oxide (TGO) layer and measuring residual stresses in the TGO layer are critical to developing reliable remaining-life prediction models. Karta will measure the TGO thickness using Impedance Spectroscopy and measure the residual stresses using the Photo-Stimulated Luminescence Piezospectroscopy technique. Analytical models developed in Phase I will be validated by extensive laboratory testing. The proposed NDI techniques will be validated by laboratory tests. Remaining life models developed in Phase I will be validated by burner rig tests to simulate actual engine environments and by testing service run engine components, such as airfoils. The models will use neural network analysis for calculating the remaining life of coatings.

* information listed above is at the time of submission.

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