NASA STTR 2005 Solicitation

FORM B - PROPOSAL SUMMARY


PROPOSAL NUMBER:05 T8.01-9697
RESEARCH SUBTOPIC TITLE:Aerospace Manufacturing Technology
PROPOSAL TITLE:Gradient Interphase, 3-D fiber architecture CMC?s

SMALL BUSINESS CONCERN (SBC): RESEARCH INSTITUTION (RI):
NAME: 3TEX, Inc. NAME:Southern Illinois University Carbondale
ADDRESS:109 MacKenan Drive ADDRESS:Center for Advanced Friction Studies
CITY:Cary CITY:Carbondale
STATE/ZIP:NC  27511-7903 STATE/ZIP:IL  62901-6899
PHONE: (919) 481-2500 PHONE: (618) 453-7932

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name,Email)
Dr. Keith   Sharp
sharpk@3tex.com

TECHNICAL ABSTRACT (LIMIT 200 WORDS)
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.

POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
Target NASA markets would be:

- TPS structures for next generation Shuttle, Mars and Lunar mission modules, heat shields. Leading edges for hypersonic SSTO vehicles
- Propulsion system components, such as nozzles, pump covers, pump components,
- Acreage for external combustion engine designs.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
Target markets would be:

- Gas Turbine Engine Components ? Medium to large market with some R&D money available, though less R&D money than the TPS structures. Performance is a driver, so a premium would be paid for additional performance. Main components where 3TEX should offer advantage are guide vanes for all engines and exhaust flaps for those with afterburners.
- Chemical processing (pump components, stirrers, heaters) ? Medium to large market, with some premium available for corrosion resistance.
- Industrial burners ? Large market, though very competitive on price and little to no R&D money available.

NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.

TECHNOLOGY TAXONOMY MAPPING
Ceramics
Composites
Multifunctional/Smart Materials


Form Printed on 09-19-05 13:14