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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Graphite and C-H-O gas phase equilibrium at high temperatures and pressures in implication of Earth ocean and atmosphere development
Wavelength dependence of polarization by small graphite flakes with anisotropic dielectric constant
Pyrolytic graphite production by thermal decomposition of hydrocarbon gas on heated surface, noting annealing, alloying and residual stresses
Permeability measurements of porous graphites measured from room temperature to 1000 deg F in gaseous nitrogen and helium
Room temperature mechanical behavior of various chemical and experimental graphites
Fabrication of metal carbide-graphite composites by hot pressing at high temperatures
Effects of atmospheric reentry on graphite particles
Metal carbide-graphite composite fabrication by hot pressing at temperatures to 3200 deg C
Nitrogen injection effects on boundary layer of graphite surface in high-temperature dissociated airflow
Experimental investigation to evaluate high temperature performance and self-generating protective oxide coating of three JT graphite composites
Catalytic effect of impurities on oxidation rate for selected artificial graphites
Equilibrium carbon monoxide pressures measured by torsion effusion studies of reaction of graphite with hafnium and uranium dioxides at high temperatures
Far UV extinction curve and wavelength dependence of interstellar polarization by graphite grains
Pulsed laser techniques for measuring thermal diffusivity of graphites and chars between 500 and 5000 degrees F
Graphite thermochemical response tested in simulated environment for use as thermal shield for hypersonic reentry vehicles
Low dose reactor irradiation effect on temperature dependence of dynamic modulus and internal friction of as-deposited pyrolytic graphite
Boron and graphite filament-resin composites tensile and interlaminar shear strengths and Al foil liner cyclic life in cryogenic pressure vessel tests
Space radiation transport models clearly show that low atomic weight materials provide a better shielding protection for interplanetary human missions than high atomic weight materials. These model studies have concentrated on shielding properties against charged particles. A light-weight, inflatable habitat module called TransHab was built and shown to provide adequate protection against micrometeoroid impacts and good shielding properties against charged particle radiation in the International Space Station orbits. An experiment using a tissue equivalent proportional counter, to study the changes in dose and lineal energy spectra with graphite, aluminum, and a TransHab build-up as shielding, was carried out at the Los Alamos Nuclear Science Center neutron facility. It is a continuation of a previous study using regolith and doped polyethylene materials. This paper describes the results and their comparison with the previous study. Published by Elsevier Science Ltd.