Surface Processing for Enhanced Environmental and Creep-Fatigue Resistance

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,900.00
Award Year:
2008
Program:
SBIR
Phase:
Phase I
Contract:
FA8650-08-M-5207
Agency Tracking Number:
F073-038-0869
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
DIRECTED VAPOR TECHNOLOGIES INTERNATIONAL, INC.
2 Boar's Head Lane, Charlottesville, VA, 22903
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
036500804
Principal Investigator:
Derek Hass
Dir. of Research and Development
(434) 977-1405
derekh@directedvapor.com
Business Contact:
Harry Burns
President and CEO
(434) 977-1405
harryburns@directedvapor.com
Research Institution:
n/a
Abstract
The ongoing drive to increase the performance and efficiency of propulsion systems has led to increasingly severe operating environments, particularly for the components in the hot sections of turbine engines. One potential life-limiting area of future engines is the turbine disk where significant dwell fatigue may occur if engine temperatures are elevated. The mechanism for this reduction is not fully clear but is related to effects of grain boundary creep and surface oxidation / corrosion. The study proposed here will seek to develop advanced surface chemistry and modification techniques for the nickel-base superalloys used for turbine disks to limit dwell fatigue damage and promote higher operating temperatures in the engine. Key factors that will be studied include: (i) computational approaches to designing novel coating compositions that exhibit minimal interdiffusion and hence excellent compatibility with the substrate owing to chemical activity matching; (ii) the deposition, oxidation and compatibility testing of selected compositions; and (iii) the deposition of selected coated systems. Preliminary mechanical testing of the coated systems will be carried out. A targeted significant outcome of this study is the establishment of novel and cost-effective surface modifications that confer greatly improved component reliability and durability.

* information listed above is at the time of submission.

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