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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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Vapor deposition of pyrolytic graphite thin films on liquid metal substrates for producing high strength filaments
Optical reflectance measurements of pyrolytic graphite and phenolic nylon chars and potential application to heat shield requirements
Ceramic coated plutonium base particle fuels and graphite coatings on fuel particles
Mechanical properties of continuous filament- graphite matrix composite in 0.50 inch diameter rod form, discussing limitation of binder phase and interface
Reflectance of pyrolytic graphite and phenolic nylon chars for radiant heat rejection from nonablating heat shield
This paper deals with the electrochemical production of hydrogen by depolarizing the oxygen evolution reaction using human feces and urine, which contains 30-40% bacteria and yeast. The electroactivity of graphite, tungsten carbide, perovskite and RuO2-coated Ebonex (Ti4O7) as anode materials are compared. The scale-up of the process in a laboratory-scale three-dimensional packed bed cell is discussed.
The penetration depth of low-energy heavy ions in botanic samples was detected with a new transmission measurement. In the measurement, highly oriented pyrolytic graphite (HOPG) pieces were placed behind the botanic samples with certain thickness. During the irradiation of heavy ions with energy of tens of keV, the energetic particles transmitted from those samples were received by the HOPG pieces. After irradiation, scanning tunneling microscope (STM) was applied to observe protrusion-like damage induced by these transmitted ions on the surface of the HOPG. The statistical average number density of protrusions and the minimum transmission rate of the low-energy heavy ions can be obtained. The detection efficiency of the new method for low-energy heavy ions was about 0.1-1 and the background in the measurement can be reduced to as low as 1.0 x 10(8) protrusions/cm2. With this method, the penetration depth of the energetic particles was detected to be no less than 60 micrometers in kidney bean slices when the slices were irradiated by 100 keVAr+ ion at the fluence of 5 x 10(16) ions/cm2. c2002 Elsevier Science Ltd. All rights reserved.
Motor brushes of proper quantities of molybdenum disulfide and copper or silver are manufactured by sintering techniques. Graphite molds are used. These brushes operate satisfactorily for long periods in normal atmosphere or in a high-vacuum environment.
Measurement of total normal emittance of nuclear reactor materials - carbon steel, boron steel, & borated graphite
Inductively heated graphite furnace, having a source of blackbody radiation, for calibration of pyrometers up to 3,000 degrees k
X-ray study of meteoritic and synthetic diamonds to show that ureilite meteoritic diamonds were formed by some preterrestrial shock rather than by gravitational compression of graphite
Friction coefficients of polytetrafluoroethylene and molybdenum sulfide-graphite-sodium silicate coatings for space lubrication
Nontoxic paste consisting of a dispersion of graphite or silver granules in a mixture of polyvinylpyrolidone and diluted glycerol secures biomedical electrodes to human skin. Silver paste has a high electrical conductivity and forms a bond between metal and moist or dry skin.
Sintered plate and graphite nickel oxide electrode composition - battery active nickel oxides
Thermal conductance of chars from nylon - phenolic composites as function of graphitization, density, and pore spectra
X-ray diffraction, differential thermal analysis, and chemical analysis of sintered nickel electrode at graphitic level and high temperatures
Crystalline surface investigation - epitaxy of compound crystals influenced by radiation and of graphites on fluorites, interfacial energy and nucleation, monolayer metals, and alkali films