Damping Coatings for Gas Turbine Compression System Airfoils

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-06-C-0027
Agency Tracking Number: N041-019-0355
Amount: $998,771.00
Phase: Phase II
Program: SBIR
Awards Year: 2005
Solicitation Year: 2004
Solicitation Topic Code: N04-019
Solicitation Number: 2004.1
Small Business Information
4011 Riverside Drive, Dayton, OH, 45405
DUNS: 074693987
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Michael Willson
 (937) 278-6547
Business Contact
 Joseph Cheng
Title: CEO/CFO
Phone: (937) 278-6547
Email: joec@apsmaterials.com
Research Institution
The use of monolithic airfoil structures in static and rotating components such as one-piece integrally bladed rotors (IBR's) in military turbine engines has created an increased risk of high cycle fatigue (HCF). The Phase I SBIR studies recently demonstrated plasma sprayed hard coating concepts that show significantly greater damping than has been observed in previous investigations. Polymer-impregnated plasma sprayed coatings exhibited over 6 times the damping of typical plasma sprayed damping coatings at low dynamic strains and close to twice the damping at higher strains. High-cycle fatigue tests showed only a 10% drop in the maximum tolerable load when compared with specimens with no coating. Phase II efforts will investigate the effect of processing parameters on damping and overall mechanical properties. Studies will also include damping, fatigue, erosion, impact investigations and spin-pit testing of coated airfoils. The development of robotic manipulation programs for robotic plasma spraying of complex shaped prototype blades will provide consistent plasma sprayed coatings. A concerted effort to study a large sample of plasma sprayed damping metal and ceramic coatings in conjunction with the investigation of other viscoelastic materials should provide a significant number of candidate coating systems with exceptional damping properties over a wide temperature range.

* Information listed above is at the time of submission. *

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