Accession Number:

AD0776405

Title:

Study of Production Methods for High Temperature Solid Propellant Motor Nozzles.

Descriptive Note:

Final rept. 22 Dec 72-22 Jan 74,

Corporate Author:

HERCULES INC CUMBERLAND MD ALLEGANY BALLISTICS LAB

Personal Author(s):

• McComas,T. D.
• Vicario,A. A.
• Casseday,E. D.

Report Date:

1974-03-01

Pagination or Media Count:

173.0

Abstract:

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

Descriptors:

• *Rocket nozzles
• Composite materials
• Carbon
• Production
• Processing
• Graphite
• Thermal properties
• Structural properties
• Strength(Mechanics)
• Solid propellant rocket engines

Subject Categories:

• Solid Propellant Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE