Low Conductivity for Thermal Barrier Coatings (TBCs)

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$729,997.00
Award Year:
2001
Program:
SBIR
Phase:
Phase II
Contract:
DAAH10-02-C-0002
Award Id:
52744
Agency Tracking Number:
A002-2870
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1801 Maple Avenue, Suite 5316, Evanston, IL, 60201
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
020126814
Principal Investigator:
SankarSambasivan
President and CEO
(847) 467-5282
sankar@atfinet.com
Business Contact:
JohnRechner
Business Manager
(847) 467-5235
jrechner@atfinet.com
Research Institute:
n/a
Abstract
Higher inlet temperatures for turbine engines will provide significant benefits in fuel efficiency and performance for both military and commercial air vehicles. To accomplish this goal, new generation thermal barrier coatings (TBCs) with superiorreliability and durability will be needed. The currently-used zirconia-based TBCs do not adequately meet thermal conductivity requirements and they suffer from thermomechanical degradation during exposure at elevated temperatures. In this effort, a novelcrystal chemistry approach is being explored to examine a new family of layered perovskites as TBC materials. Key properties of these highly anisotropic materials include low thermal conductivity (0.7 W/m-K @ 13000C), tailorable CTE to potentially matchsubstrate for minimizing residual stress, and inherent strain tolerance to potentially accommodate stresses induced during thermal exposure and cycling. During Phase II, coatings of proposed material will be produced by plasma spray technology. The focuswill be to optimize coatings for obtaining thermally stable and desired microstructure, crystallographic texture, and thickness to yield durable and reliable TBCs that also meet Army's targeted requirements for low thermal conductivity. Thermal cyclingtests will be conducted on coated superalloy coupons to determine coating performance and durability. The work will be conducted in collaboration with a turbine engine manufacturer.

* information listed above is at the time of submission.

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