X-ray and ESR characterization of the effects of high energy radiation of graphite fiber reinforced composite materials. [Electron and gamma radiation]
Technical Report
·
OSTI ID:6267132
The graphite crystalline structure in graphite fiber reinforced composites (graphite/epoxy and graphite/polyimide) and graphite fiber strands before and after exposure to 0.5 MeV electron radiation up to 8000 Mrads was examined. Cured epoxy samples of tetraglycidyl-4,4'-diaminodiphenyl methane (TDGDDM) and 4,4'-diaminodiphenyl sulfone (DDS) (the matrix material for graphite/epoxy composites) were prepared at various molar ratios and irradiated with 5 and 25 Mrads of Co-60 gamma radiation at 77 K. Samples of DDS were irradiated with 5 to 30 Mrads of Co-60 radiation. Radical decay rates were obtained using electron spin resonance spectroscopy, and the radical decay at room temperature can be approximated by two simultaneous equations which describe the decay of radicals occurring in two different regions, one a fast decaying component and the other a slow decaying component.
- Research Organization:
- North Carolina State Univ., Raleigh (USA)
- OSTI ID:
- 6267132
- Report Number(s):
- N-8316395
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of high energy radiation on the mechanical properties of epoxy/graphite fiber reinforced composites. Final technical report
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Technical Report
·
Wed Jul 01 00:00:00 EDT 1987
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OSTI ID:6038042
Effects of high energy radiation on the mechanical properties of epoxy/graphite fiber composites
Technical Report
·
Mon Nov 30 23:00:00 EST 1981
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OSTI ID:6771964
Electron-spin-resonance investigations and surface characterization of TGDDM-DDS epoxy and T-300 graphite fiber exposed to ionizing radiation
Thesis/Dissertation
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Mon Dec 31 23:00:00 EST 1984
·
OSTI ID:5027330
Related Subjects
36 MATERIALS SCIENCE
360302* -- Composite Materials-- Structure & Phase Studies-- (-1987)
360306 -- Composite Materials-- Radiation Effects-- (-1987)
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON
COBALT 60
COBALT ISOTOPES
COMPOSITE MATERIALS
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ELECTRONS
ELEMENTAL MINERALS
ELEMENTARY PARTICLES
ELEMENTS
EPOXIDES
FERMIONS
FIBERS
GAMMA RADIATION
GRAPHITE
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTONS
MAGNETIC RESONANCE
MATERIALS
MATRIX MATERIALS
MINERALS
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOISOTOPES
RESONANCE
X RADIATION
YEARS LIVING RADIOISOTOPES
360302* -- Composite Materials-- Structure & Phase Studies-- (-1987)
360306 -- Composite Materials-- Radiation Effects-- (-1987)
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON
COBALT 60
COBALT ISOTOPES
COMPOSITE MATERIALS
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ELECTRONS
ELEMENTAL MINERALS
ELEMENTARY PARTICLES
ELEMENTS
EPOXIDES
FERMIONS
FIBERS
GAMMA RADIATION
GRAPHITE
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTONS
MAGNETIC RESONANCE
MATERIALS
MATRIX MATERIALS
MINERALS
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOISOTOPES
RESONANCE
X RADIATION
YEARS LIVING RADIOISOTOPES