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Innovative Erosion-Resistant Coating Materials/Concepts for Leading Edges on Composite Rotor Blades

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-04-C-0079
Agency Tracking Number: N022-0962
Amount: $750,000.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: N02-162
Solicitation Number: 2002.2
Solicitation Year: 2002
Award Year: 2004
Award Start Date (Proposal Award Date): 2004-06-09
Award End Date (Contract End Date): 2006-06-09
Small Business Information
107 Research Drive
Hampton, VA 23666
United States
DUNS: 119069052
HUBZone Owned: No
Woman Owned: Yes
Socially and Economically Disadvantaged: No
Principal Investigator
 Karl Wiedemann
 Senior Scientist
 (757) 865-7093
Business Contact
 Jalaiah Unnam
Title: President
Phone: (757) 865-7093
Research Institution

The Navy's helicopters and aircraft encounter dust, salt and water laden environments. The impact of sand and water droplets onto the rotor blades at high velocities causes rotor life to drop drastically. The cost of replacing and maintaining rotor blades is a significant factor. The current solution is to use metallic abrasion strips that offer limited protection. AS&M has been developing a coating that provides superior erosion protection. AS&M's coating is a nano-composite reinforced elastomer with superior erosion resistance. The coating resists erosion by absorbing a part of the impact energy. In Phase I, the applicability of AS&M's coating on composite material was demonstrated. AS&M's coating was found to have adequate adhesion, uniformity, smoothness, high velocity sand erosion and cavitation properties. It was also found to be applicable on a range of substrates - aluminum, stainless steel, nickel, titanium and steel. In Phase II, we propose to further develop the material to improve its thermal conductivity and optimize the composition to demonstrate combined sand and rain erosion resistance in the whirling arm test. The up-scaling capabilities will be established by standardizing the technology-related issues that include specification of raw materials, mixing, spray processing, finishing, field applicability and repair.

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

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