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Multilayer Coating for Protection of Titanium Aluminides from Oxidation and…

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
28211
Program Year/Program:
1995 / SBIR
Agency Tracking Number:
28211
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
ANALYTICAL SERVICES & MATERIALS, INC.
107 Research Drive Hampton, VA 23666
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Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1995
Title: Multilayer Coating for Protection of Titanium Aluminides from Oxidation and Hydrogen Embrittlement
Agency / Branch: DOD / USAF
Contract: N/A
Award Amount: $79,700.00
 

Abstract:

Application of gamma titanium aluminides in gas turbine engines is limited by the room-temperature ductility loss that occurs when exposed to moist air or hydrogen-bearing gases. These gasses are typically found in a gas turbine engine environment. A protective and less expensive multilayer coating will protect titanium aluminides from oxidation and hydrogen embrittlement. The proposed coating will consist of a Two-Phase-Glass (TPG) overlayer over a dense A1203 base layer. The Al10 layer will prevent hydrogen diffusion into the alloy. The TPG overlayers will shield the underlying Al203 layer and base intermetallic alloy from direct exposure to the environment. Coated and uncoated tensile test samples will be prepared and exposed to moist air at temperatures ranging from 200 deg C and room temperature ductility will be evaluated. In addition, coated and uncoated coupon specimens will be exposed to isothermal and cyclic oxidation. One or two the best coatings from Phase I effort will be selected for further testing in Phase II. Phase II studies will include tests in pure hydrogen atmosphere, fatigue tests on actual engine parts in the turbine environment. Tests in pure hydrogen are also proposed as a Phase I option.

Principal Investigator:

Dr Sankaran
8048657093

Business Contact:

Small Business Information at Submission:

Analytical Services &
107 Research Drive Hampton, VA 23666

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No