High Temp Standoff Dielectric Antenna Windows Based on 3-D Woven Preforms

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-09-C-0480
Agency Tracking Number: N081-071-0984
Amount: $436,170.00
Phase: Phase II
Program: SBIR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: N08-071
Solicitation Number: 2008.1
Small Business Information
109 MacKenan Drive, Cary, NC, 27511
DUNS: 030936335
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Keith Sharp
 Principal Investigator
 (919) 481-2500
 sharpk@3tex.com
Business Contact
 Patty Pennell
Title: Corporate Accountant
Phone: (919) 481-2500
Email: pennellp@3TEX.com
Research Institution
N/A
Abstract
Supersonic cruise missiles offer the ability to hit a time critical target with precision and lethality from long distances, yet the high speed generates temperatures on the exterior surfaces of the missile that can exceed the limitations of high temperature structural metals like titanium. Also, insulation to protect electronics equipment in the missile is required. One solution that demonstrates promise for high-temperature, structural antenna windows is structural ,low dielectric constant, oxide-oxide ceramic matrix composite (CMC) based on a 3-D woven preform that integrates the thermal protection system. The 3-D preform consists of ceramic fabric skins separated by through-thickness reinforcements, or Z-yarns, woven into each skin. Structures based on oxide-oxide systems have suitable dielectric properties and can withstand the anticipated high temperatures. The 3-D oxide fiber architecture also provides a means for optimizing the overall system performance since many key properties depend primarily on the details of the Z-yarn placement and volume fraction. The Phase I effort successfully demonstrated fabrication of two Nextel 720 preforms infused with alumina matrices. The proposed Phase II program will further develop the design space associated with the integral standoff CMC materials, characterize a matrix of the standoff materials, and resolve remaining manufacturing challenges.

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

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