Enhanced Toughness SiC with High Hardness for Advanced Armor

Award Information
Agency: Department of Defense
Branch: Army
Contract: DAAD17-02-C-0052
Agency Tracking Number: A012-2059
Amount: $119,581.00
Phase: Phase I
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Ceramatec, Inc.
2425 South 900 West, Salt Lake City, UT, 84119
DUNS: 089500540
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Raymond Cutler
 Senior Research Scientist
 (801) 978-2126
 cutler@ceramatec.com
Business Contact
 Michael Keene
Title: Vice-President
Phone: (801) 978-2152
Email: mkeene@ceramatec.com
Research Institution
N/A
Abstract
"Recent efforts at engineering the microstructures of SiC have resulted in fracture toughness values that are 2-3 times that of conventionally sintered SiC. However, these methods of toughening have resulted in decreased hardness, a property that iscritical for armor applications. The proposed research attempts to toughen SiC without sacrificing hardness. The Phase I effort is based on toughening using two secondary phases. The first is a sintering aid that results in elongated SiC grains, whichtoughen by crack bridging and crack branching. The second, added at a much higher volume fraction, allows microcrack toughening to enhance the toughness of the composite material without sacrificing hardness. A Taguchi designed experiment is proposed tolook at interactions between the secondary phases, as well as other key variables. A 25 mm x 200 mm x 200 mm SiC composite tile having the target toughness and hardness will be delivered at the end of the Phase I research. Lightweight SiC with enhancedtoughness will allow improved protection for the Army, as well as law-enforcement agencies and private armored vehicles. This same material is expected to perform well in non-corrosive environments, such as nozzles for oil well drilling and water-jetcutting."

* information listed above is at the time of submission.

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