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MWM-Array Inspection of HVOF Coated Landing Gear Components

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8222-10-C-0012
Agency Tracking Number: F093-199-2247
Amount: $99,961.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: AF093-199
Solicitation Number: 2009.3
Solicitation Year: 2009
Award Year: 2010
Award Start Date (Proposal Award Date): 2010-06-15
Award End Date (Contract End Date): 2011-03-14
Small Business Information
110-1 Clematis Avenue
Waltham, MA 02453
United States
DUNS: 018791827
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Neil Goldfine
 Chief Engineer
 (781) 642-9666
Business Contact
 Joni Hatem
Title: Sr. Vice President
Phone: (781) 642-9666
Research Institution

Electrolytic hard chromium coatings (EHC), commonly used on high strength steel landing gear components, are being replaced by the more environmentally benign tungsten carbide-cobalt (WC-Co) coatings, applied via high velocity oxygen fuel (HVOF) spray method. There is a need for a nondestructive testing (NDT) method to confirm coating thickness and coverage and also to detect cracks and grinding burns in the substrate, without removing the coating. In this proposed Phase I program, JENTEK will evaluate the feasibility of inspecting HVOF coatings and high strength steel substrates using scanning Meandering Winding Magnetometer arrays (MWM-Arrays). MWM-Arrays are arrays of conformable eddy current sensors that produce high resolution, spatially registered, digital images of absolute material properties. Comparison of time sequenced images allows noise suppression and early detection of fatigue cracking. JENTEK’s multi-variate inverse methods permit imaging of multiple unknowns. For this SBIR, we will image coating thickness, coating conductivity, and/or permeability and substrate conductivity and/or permeability. These absolute property images then reveal damage and support condition assessment. JENTEK will be supported on this program by Messier-Dowty, a world leader in landing gear design, development, manufacture and support, and by Delta TechOps, the largest aircraft overhaul and maintenance facility in North America. BENEFIT: If this project is successful, the Air Force will have a means to assure HVOF coating integrity and a reliable means for detection of defects in the steel substrate. This will facilitate the transition from EHC to HVOF WC-Co. This transition is also occurring in the commercial aviation community and an NDT method, thus we anticipate a substantial commercial demand for this SBIR developed capability.

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

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