Development of Textured and Single Crystal Garnet Fibers for Advanced Oxide CMCs

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F49620-01-C-0058
Agency Tracking Number: F013-0138
Amount: $99,988.00
Phase: Phase I
Program: STTR
Awards Year: 2001
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
1110 Benfield Blvd., Millersville, MD, 21108
DUNS: 783765670
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Mark Patterson
 Chief Scientist
 (410) 224-3710
Business Contact
 Sharon Fehrenbacher
Title: Vice President
Phone: (410) 224-3710
Research Institution
 Waltraud M Kriven
 1304 West Green Street, College Of Engineering
Urbana, IL, 61801
 Nonprofit college or university
The proposed research effort focuses on developing a method to synthesize and crystallize doped YAG to produce textured or single crystal fibers that exhibit little degredation in strength and excellent creep resistance at temperatures in excess of 1400C.YAG will be synthesized from polymerized sol gel precursors, drawn into fibers and continuously crystallized using a quadrapole crystallizer. This approach is continuous, and fully scaleable. The effect of cationic dopants on the recrystallization of YAGwill be investigated by electron microscopy. Measurment of the individual tensile strengths and creep resistance of the fibers at temperatures up to 1400C will be performed. Microstructures and mechanical property information that is obtained will beused to influence the processing conditions that are selected. The results will establish further understanding of the structure-process relationship for the fabrication of stable, creep resistant oxide fibers for a broad range of applications.It isexpected that the proposed research will lead to the development of a stable high temperature oxide fiber with little loss in strength and exceptional creep resistance at temperatures in excess of 1400C. When scaled to commercial size and quantities,these fibers will be used extensively for oxide preforms for a range of CMC engine components - combustors, turbines, commpressors, exhaust nozzles, vanes, blades and shrouds etc.. Additionally, if single crystals can be produced, extensive opportunitiesexist for fiber optic applications.

* information listed above is at the time of submission.

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