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High-Temperature Environmental Barrier Coating for Silicon Carbide Composites

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
2009 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
UES, Inc.
4401 Dayton-Xenia Road Dayton, OH 45432-1894
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Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2009
Title: High-Temperature Environmental Barrier Coating for Silicon Carbide Composites
Agency / Branch: DOD / USAF
Contract: FA9550-09-C-0152
Award Amount: $99,954.00


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.)

Principal Investigator:

Emmanuel Boakye
Research Scientist

Business Contact:

Bryce W. Skinn
Business Relations Manage
Small Business Information at Submission:

UES, Inc.
4401 Dayton-Xenia Road Dayton, OH 45432

EIN/Tax ID: 310797776
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
Oak Ridge National Laboratory
P.O. Box 2001
Oak Ridge, TN 37831
Contact: Mary L. Crow
Contact Phone: (865) 576-7343
RI Type: Federally funded R&D center (FFRDC)