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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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Niobium film superconductor carries high currents in strong magnetic fields. The thin niobium film is formed on an inert substrate through evaporation in a vacuum environment. Control of temperature and vacuum results in rejection of gaseous impurities so that the film is of a very high purity.
Parametric evaluation of hydraulic, pneumatic, and electromechanical actuators for manned spacecraft tasks
Hydraulic actuation systems analysis and design, and simulated space temperature and pressure environmental testing
Dimensional instability of aluminum alloys during cryogenic thermal cycling
Martensitic transformation effect in austenitic stainless steel at cryogenic temperatures to determine weld failures in Centaur bulkheads
Chemical process for study of thermodynamic and kinetic behavior of electrically activated reactions
Lightweight magnesium alloys for cryogenic applications
Metal, alloy, and metal compound testing for corrosion resistance and activity as oxygen electrodes for hydrox fuel cell with alkaline electrolyte
Apparatus to determine linear thermal expansion in structural metals and plastics from cryogenic to room temperature
Physical properties of materials at cryogenic temperatures for aerospace applications
Mass spectrometer measurements of oxygen fluorides at cryogenic temperatures
Measuring wear life and friction coefficient of dry film and solid film lubricants and plastic materials in ultrahigh vacuum
Microwave discharge technique for depositing noncrystalline oxide films of silicon, germanium, boron, titanium and selenium on substrates by decomposing compounds by oxygen plasma
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Soft metal plating of hard metal lip seal enables successful operation of seal in a cryogenic fluid line under high pressure. The seal is coated with a thin film of 24 carat gold on the lip area to provide antigall and seal properties.
Three new magnesium-lithium alloys have been developed for application at cryogenic temperatures. These lightweight alloys have approximately doubled the tensile and yield strengths at room temperature of previously described magnesium-lithium alloys.
A matched waveguide termination was required as part of the noise temperature calibration facility in the receiving system at the Goonhilly earth-station. For routine measurement of overall system noise temperature, this termination is at ambient temperature. For other noise measurements, and in particular for the measurement of the effective input noise temperature of the maser, the waveguide termination is cooled to 77°K by immersion in liquid nitrogen.