High-Temperature Environmental Barrier Coating for Silicon Carbide Composites

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,954.00
Award Year:
2009
Program:
STTR
Phase:
Phase I
Contract:
FA9550-09-C-0152
Award Id:
90222
Agency Tracking Number:
F08B-T21-0012
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
4401 Dayton-Xenia Road, Dayton, OH, 45432
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
074689217
Principal Investigator:
EmmanuelBoakye
Research Scientist
(937) 426-6900
eboakye@ues.com
Business Contact:
BryceSkinn
Business Relations Manage
(937) 426-6900
bskinn@ues.com
Research Institute:
Oak Ridge National Laboratory
Mary L Crow
P.O. Box 2001
Oak Ridge, TN, 37831
(865) 576-7343
Federally funded R&D center (FFRDC)
Abstract
A key limitation in the use of silicon carbide based composites (SiC/SiC) in the next generation turbine engines is their poor oxidation resistance and SiO2 recession at high temperatures particularly in the presence of water vapor. The primary objective of an environmental barrier coating (EBC) is to provide the necessary protection to SiC/SiC composites from water vapor attack and to reduce the SiO2 recession. Current EBCs are all Silicon based and suffer from surface recession. UES Inc. proposes to study the effectiveness of novel CTE graded rare earth phosphates with various monazite/xenotime compositions devoid of silicon, for environmental protection of SiC-based ceramics in combustion environment above 1500 C. Further, UES proposes to use porous YAG as a top coat to enable the EBCs to function as TBCs at 1650 C. BENEFIT: It is anticipated that under the Phase I program, EBC/TBC that protect Si-based composites from oxidation and SiO2 recession will be developed. In the phase II program, the coating techniques will be fined tuned and UES will work closely with COI composites to scale up the coating process. At the end of Phase II, we anticipate licensing the EBC/TBC to COI.)

* information listed above is at the time of submission.

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