Lightweight Composite Armore Tile

Award Information
Agency: Department of Defense
Branch: Army
Contract: N/A
Agency Tracking Number: 32887
Amount: $70,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1996
Solitcitation Year: N/A
Solitcitation Topic Code: N/A
Solitcitation Number: N/A
Small Business Information
Chemat Technology, Inc.
19365 Business Center Drive, Suite 8 & 9, Northridge, CA, 91324
Duns: N/A
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Cheng-jye Chu
 (818) 727-9786
Business Contact
Phone: () -
Research Institution
Microwave sintering of ceramics has many advantages compared to the conventional process, for example, reduction in manufacturing cost and processing times, improving product uniformity, microstructures, properties, and yield. Pressureless sintering of B4C by microwave resulted the final products with high density and high mechanical strength in a much faster sintering rate (10 to 50 times faster) than the conventional process. The internal heating and enhancement of diffusion by microwave can lowe the reaction temperature and increase the reaction rate for carbothermal reduction. By microwave heating, reaction-sintering of B4C by carbothermal reduction of B2O3 become possible. By using a carbon fiber preform (either carbon fiber weaves or carbon/resin composite) that interact strongly with microwave to melt B2O3, B4C can be formed by carbothermal reduction, and B4C fiber weaves can be achieved. A glassy phase can than be filled in to the pores followed by a controlled crystallization to convert to a glass-ceramic matrix. This microwave-induced B4C fiber-reinforced glass-ceramic armor tile should have a density lower than the conventional B4C ceramic tiles with the equal or even better ballistic strength. Many studies on microwave processing and our preliminary results further indicate the feasibility. Successful development of this microwave reaction sintering and controlled-crystalization process will provide a revolutional processing technique for high temperature, high strength materials.

* information listed above is at the time of submission.

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