STUDY OF THE MECHANISM OF FAILURE OF ROCKET MATERIALS AND MATERIALS RESEARCH
Technical Report
·
OSTI ID:4816172
Rocket failure mechanisms in conjunction with the development of nozzle materials for solid propellant motors is discussed. Testing graphite in an oxy- acetylene torch and the effects of purity, density, orientation, and microstructure on erosion-resistance were evaluated. Erosion decreased with greater purity. New graphite materials were developed and evaluated including hot pressed compositions and impregnated bodies. Suitability of ZrC as a nozzle material was evaluated. Incorporation of Ta and W fibers in ZrC results in considerable improvement in resistance to thermal spalling although not sufficient to prevent cracking. Thoria-base bodies reinforced with W fibers were also studied. Ten promising materials were fabricated into rocket nozzles and tested in static motor stands. Erosion performance is presented along wlth analysis of failure mechanisms. (auth)
- Research Organization:
- Illinois Inst. of Tech., Chicago. Armour Research Foundation
- NSA Number:
- NSA-16-027624
- OSTI ID:
- 4816172
- Report Number(s):
- ASD-TDR-62-314
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACETYLENES
CONFIGURATION
CRACKS
DENSITY
EFFICIENCY
EROSION
FABRICATION
FAILURES
FIBERS
GRAPHITE
HOT WORKING
IMPREGNATION
IMPURITIES
MACHINE PARTS
MATERIALS TESTING
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
MOTORS
NOZZLES
OXYGEN
PLANNING
PRESSURE
PROPULSION
ROCKETS
SOLIDS
STABILITY
TANTALUM
THORIUM OXIDES
TUNGSTEN
ZIRCONIUM CARBIDES
CONFIGURATION
CRACKS
DENSITY
EFFICIENCY
EROSION
FABRICATION
FAILURES
FIBERS
GRAPHITE
HOT WORKING
IMPREGNATION
IMPURITIES
MACHINE PARTS
MATERIALS TESTING
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
MOTORS
NOZZLES
OXYGEN
PLANNING
PRESSURE
PROPULSION
ROCKETS
SOLIDS
STABILITY
TANTALUM
THORIUM OXIDES
TUNGSTEN
ZIRCONIUM CARBIDES