Advanced Blade-Damping Coatings Navy SBIR FY2006.2 Sol No.: Navy SBIR FY2006.2 Topic No.: N06-118 Topic Title: Advanced Blade-Damping Coatings Proposal No.: N062-118-0056 Firm: Phygen, Inc. 1400 Marshall St. NE Minneapolis, Minnesota 55413 Contact: Frank Lemkey Phone: (612) 331-4224 Web Site: phygen.com Abstract: The object of Phygen's proposal is to demonstrate the dual use (damping and erosion) capabilities of a physical vapor deposited coating for titanium airfoils using a novel graded interface approach. The proposed coating builds on previous government and aircraft engine company support which demonstrated modest high frequency damping up to 700F using only a thin (~40um) lightweight and highly adherent Sn,MgO+Cr damping layer. Improved damping response will be addressed by increasing the thickness to ~125um without effecting aerodynamic performance and good surface finish. Current plasma sprayed mag spinel coatings provide similar damping with coating thickness of >3-6 times greater. The proposed coating will additionally provide erosion and corrosion resistance from developed dense outer layers of TiC/CrN thus permitting a potential triple use capability. Adherence, damping, high cycle fatigue, and sand erosion resistance measurements will be measured to compare the developed coatings with previous benchmarked systems. Benefits: Engine failures and increased maintenance due to fatigue and erosion have cost the military an estimated $400 Million per year over the past two decades. Damping coating treatments capable of reducing the internal stresses of fan and compressor blades to levels where fatigue is less likely to occur have the potential for reducing cost while enhancing reliability. The developed coating process has signficant potential for both Military and Commercial aerospace turbo machinery applications. Return