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

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,988.00
Award Year:
2001
Program:
STTR
Phase:
Phase I
Contract:
F49620-01-C-0058
Award Id:
52599
Agency Tracking Number:
F013-0138
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1110 Benfield Blvd., Millersville, MD, 21108
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
783765670
Principal Investigator:
MarkPatterson
Chief Scientist
(410) 224-3710
patterson@techassess.com
Business Contact:
SharonFehrenbacher
Vice President
(410) 224-3710
sharon@techassess.com
Research Institute:
UNIV. OF ILLINOIS
Waltraud M Kriven
1304 West Green Street, College Of Engineering
Urbana, IL, 61801

Nonprofit college or university
Abstract
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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