Gradient Interphase, 3-D Fiber Architecture CMC's

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNM06AA68C
Agency Tracking Number: 050303
Amount: $94,667.00
Phase: Phase I
Program: STTR
Awards Year: 2006
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
3TEX, Inc.
109 MacKenan Drive, Cary, NC, 27511
DUNS: 030936335
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr. Keith Sharp
 Principal Investigator
 () -
 sharpk@3tex.com
Business Contact
 Andrew Watson
Title: Business Official
Phone: (919) 481-2500
Email: watsona@3tex.com
Research Institution
 Southern Illinois University Carbondale
 Peter Filip
 Center for Advanced Friction Studies
Carbondale, IL, 62901
 (618) 453-7932
 Nonprofit college or university
Abstract
A clear need exists for the next generation of Ceramic Matrix Composites (CMC) for Thermal Protection Systems (TPS), propulsion hardware, and other high temperature applications. No "off-the-shelf" materials and/or processes capable of meeting NASA's goals are available, yet completely integrating a unique combination of commercially available or nearly commercially available technologies can meet NASA's goals. The basic elements of the proposed approach focus on refining 3-D fiber architectures, instituting semi-conductor industry controls on the CVI process, forming a gradient interphase between the matrix and fibers, and relying on molecular level modeling results to predict thermal stability. Both 3-D woven and 3-D braided preforms will be designed and manufactured to control the resultant pocket size and shapes to reduce voids during infiltration. Pulsed CVI with an improved out-gas control system will both form a gradient interphase that reduces the CTE mismatch induced internal loads between fiber and matrix and provide a more perfect microstructure while improving processing speed. CMC test articles will be compared to previous work on molecular level thermal modeling for Phase I. Phase II will deliver optimized design and manufacturing processes capable of making impact tolerant, long fatigue life, high temperature CMC's.

* information listed above is at the time of submission.

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