Ceramic Matrix Composite (CMC) Structures for Vanes and Exhaust Nozzle Components

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-07-M-5312
Agency Tracking Number: F071-105-0805
Amount: $97,830.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2007
Solicitation Topic Code: AF071-105
Solicitation Number: 2007.1
Small Business Information
8867 Highland Rd., Baton Rouge, LA, 70808
DUNS: 157645883
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Bob Stakenborghs
 Engineering Manager
 (225) 769-2780
Business Contact
 Jack Little
Title: President
Phone: (225) 769-2780
Email: jack@evisive.com
Research Institution
The objective of this proposal is to demonstrate the feasibility of the application of a patented microwave scanning device as an NDE technique to be used in streamlining and optimizing the Ceramic Matrix Composite (CMC) manufacturing process. The scanning process (U.S. Patent numbers 6,359,446 and 6,653,847) utilizes microwaves as an interrogating beam to penetrate a dielectric material. This method has been used successfully in preliminary NDE studies of CMC components for jet engine vane and exhaust nozzles. This method is capable of providing a quick and accurate measurement of CMC porosity, which represents a significant time savings over the current Archimedes principle porosity measurement method. This investigation will be supported by a CMC manufacturing company (ATK) and a jet engine manufacturer (Pratt & Whitney). Currently, the parts are submerged in a liquid and the density is calculated using the weight and the change in water volume. The porosity is then determined as the ratio of the non-porous material density versus the measured density. This process is repeated multiple times during the manufacturing process, which results in multiple drying cycles for the part. Additionally, the method only measures “open” porosity and not porosity which is closed off from the surface.

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

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