IMPROVED OXIDATION RESISTANCE OF 3-D CARBON/CARBON COMPOSITES

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 17784
Amount: $70,950.00
Phase: Phase I
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Phasex Corp.
287 Emerson Road, Lexington, MA, 02173
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Michael P. Coffey
 (508) 794-8686
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE COATING OF CARBON FIBERS WITH SILICON CARBIDE OFFERS ENHANCED OXIDATION RESISTANCE FOR CARBON/CARBON COMPOSITES. RESEARCH TO FORM A THIN, UNIFORM, COHERENT LAYER ON FIBERS IN A TOW, TAPE, OR 3-D PREFORM IS DESCRIBED. THE RESEARCH INVOLVES THE USE OF AN ADVANCED POLYCARBOSILANE POLYMER WHICH CAN BE CONVERTED TO SILICON CARBIDE. SUPERCRITICAL FLUIDS WILL BE USED TO DISSOLVE THE PRECURSOR POLYMER. A SUPERCRITICAL SOLUTION, BECASUE OF ITS ADVANTAGEOUS TRANSPORT AND SURFACE TENSION PROPERTIES, CAN BE PENETRATE MICROCHANNELS SUCH AS THOSE IN A TIGHTLY PACKED TOW, TAPE, OR 3-D PREFORM. DEPOSITION CONDITIONS TO PRODUCE THE THIN COATING WILL BE DEVELOPED. AFTER COATING, THE POLYMER WILL BE CROSS-LINKED AND PYROLYZED TO SILICON CARBIDE, AND OXIDATION RESISTANCE OF COATED CARBON FIBERS OR PREFORMS WILL BE MEASURED AND COMPARED TO UNCOATED CARBON FIBERS OR PREFORMS. AS A MEANS OF ASSESSING THE VALUE OF THE PHASE II EFFORT, AND ECONOMIC VIABILITY EVALUATION OF THE PROCESS FOR IMPROVED COATED CARBON FIBERS WILL BE MADE ON THE PHASE I PROGRAM.

* information listed above is at the time of submission.

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