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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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Fatigue characteristics of unidirectionally solidified Al-intermetallic aluminum nickel eutectic alloy consisting of discontinuous Al-Ni intermettalic whiskers in Al matrix
Quench rate effect on martensite start temperature and fine structure of Fe-C and Fe-C-Ni steel, using transmission electron microscopy
Heat sterilization and impact resistent Ni-Cd battery development
Ni L alpha X ray emission line shape and position as function of bombarding electron energy, observing differential self absorption in anode
Intensity vs voltage curves for LEED beams from clean Ni surface, calculating Bragg spectrum with energy diagram method
Thermal conductivity and shock resistance of flame and plasma sprayed zirconia coatings on Ni-Mo-C metal
Cr-Ni system activities and phase boundaries determined by solid electrolyte technique
Cu-Ni diffusion couples voids and edges effect on concentration gradients measurement by electron probe microanalysis
Neutron activation determined concentrations of Ni, Ga, Ge and Ir in iron meteorites with silicate inclusions
Oxidation tests on TD Ni-20Cr in static, flowing, and dissociated oxygen at 1100 C and 1 torr, for space shuttle TPS material
Substructures and properties of Ni, Chromel A, Inconel 600 and TD-NiCr following explosive shock load deformation, using electron microscope
Ultrahigh vacuum deposited Ni, Fe, W and Mo films, determining molecular oxygen adsorption efficiencies
Ni-Fe alloy films composition gradients produced by W boats evaporation, noting vapor pressures effect
Highly ionized line spectra of Fe, Co, Ni and Cu belonging to Na I and Mg I isoelectronic sequences
Oxidation kinetics and scale morphology of chromium oxide forming thoriated and unthoriated Ni alloys, discussing rate controlling processes effects
Inelastic scattering alpha-gamma angular correlations from C 12, Mg 24, Ni 58 and Sn 120 decay measurements
Metal particles from the Apollo 11 and 12 soil are both meteoritic and lunar in origin. In the Apollo 12 soil, most of the metal particles are meteoritic, based on their Ni-Co contents. On the other hand, there is a much smaller proportion of meteoritic metal among the metallic inclusions in the lunar soil particles. The structures and compositions of the phases present in many of the remelted metal particles indicate either slow cooling or a reheating of those samples on the moon's surface in the 500-600 C temperature range for a year or more. Most of the meteoritic particles studied were probably originally pieces of chondrites.
An improved manufacturing process has been developed for TD-NiCr that provides sheet of improved quality, better gage control, and reproducible properties. A standard manufacturing process has been developed for the alternate alloy, DS-NiCr, produced by pack-chromizing Ni-2ThO2 sheet. Extension of forming and joining technology for TD-NiCr is in process. Formability criteria are being established for basic sheet forming processes related to the manufacture of Shuttle TPS panels. They include brake forming, corrugation forming, joggling, dimpling, and beading. Joining processes applicable to TPS panels are being optimized with emphasis on establishment of joint efficiencies. Resistance spot welding (fusion and solid state), resistance seam welding, solid-state diffusion welding, and brazing are included in the joining programs. Development of improved manufacturing technology for TD-NiCr fasteners is also being accomplished. Mechanical and physical properties of TD-NiCr are being characterized to provide design-allowable data.