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Study of Production Methods for High Temperature Solid Propellant Motor Nozzles.
Final rept. 22 Dec 72-22 Jan 74,
HERCULES INC CUMBERLAND MD ALLEGANY BALLISTICS LAB
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The program investigated low-cost fabrication processes to permit the use of advanced materials in nozzles to achieve high performance in a severe motor environment 2000 psi - 20 sec - 100 lbsec flow. Three materials and manufacturing processes were selected as primary candidates by an initial screening process. Detailed full-scale nozzle designs were developed for each of the candidates. Performance was evaluated in subscale motor firings. A final selection was made and is recommended for demonstration in a full size nozzle test. The sleected material is a carbon-carbon composite, manufactured from a graphite cloth layup preform by carbonization and successive resin infiltrationcarbonization cycles for densification 1.45 gmcc and graphitization. A program plan was developed to manufacture and test the nozzle in the specified motor environment. Author
APPROVED FOR PUBLIC RELEASE