New brazing alloy eliminates metal-stress cracking
Silver 15 zinc brazing alloy avoids the liquid- metal stress cracking of base metals when applied to 347, 316, and 410 stainless steels and certain other alloys.
Huschler, E., Jr.↗
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Results for “Silver”
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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Gelatin coated electrodes allow prolonged bioelectronic measurements
Silver electrodes treated with an anodizing electrolyte containing gelatin are used for long term monitoring of bioelectronic potentials in humans. The electrodes do not interact with perspiration, cause skin irritation, or promote the growth of bacteria.
Source record↗
Telescoping of instrumentation tubing eliminates swaging
Short sections of stainless steel tubing of slide-fit sizes fitted together and silver-soldered at the junctions form small-diameter tubing assemblies with accurately stepped-down dimensions. This method of fabrication eliminates the costly swaging operations formerly used.
Mc Clellan, E. L.↗
Differential expansion provides pressure for diffusion bonding of large diameter rings
External pressure band is used to bond aluminum alloy collars to large diameter, stainless steel rings. The band contracts while cooling and exerts pressure on the joint between the silver plated surfaces of the ring and collar which expand toward the band. This diffusion bonding by differential expansion minimizes aluminum deformation.
Source record↗
Device removes hydrogen gas from enclosed spaces
Hydrogen-oxidant galvanic cell removes small amounts of hydrogen gas continually released from equipment, such as vented silver-zinc batteries, in enclosed compartments where air venting is not feasible. These cells are used in satellite compartments.
Carson, W. N.↗
Metal boot permits fabrication of hermetically sealed splices in metal sheathed instrumentation cables
Metal boot splices hard sheathed instrumentation cables used with high temperature strain gages and thermocouples. Silver brazing the conductors together, hermetically seals the splice. This boot is a highly reliable sealed splice which is equally effective at cryogenic temperatures, high temperatures, nuclear environments, and combinations of the above.
Chambers, G.↗
Cu-Cd and Ag-Cd cermet contacts
Method for preparing copper-cadmium and silver- cadmium cermet alloys without cadmium loss - evaluation of breaking electric contacts and collector plates
COLLECTOR↗
Research on Cold Cathodes First Quarterly Report, 14 May - 14 Aug. 1965
Application of gallium phosphide crystals for hot-electron cold cathode research - life tests for silver-barium oxide phototubes - surface film, semiconductor, and vacuum requirements
HOT ELECTRON↗
Life cycle tests Monthly progress report, 31 May 1966
Life cycle test data on nickel-cadmium and silver- cadmium battery cells
TEST PROGRAM↗
Thickness of Au, Ag, and Cu films from theoretical expressions for conductivity and isothermal Hall effect.
Thickness of gold, silver and copper thin films determined, using measurements of resistance and Hall voltage
FILM THICKNESS↗
Plasma jet electrode has longer operating life
Water-cooled, silver-infiltrated tungsten electrode has twice the operating lifetime of the pure tungsten electrode used in plasma jet generators. This electrode reduces the erosion rate, ensures excellent heat transfer, and reduces thermal stresses.
Gracey, C. M.↗
Feed-through connector couples RF power into vacuum chamber
Feed-through device connects RF power to an RF coil in a vacuum chamber. The coil and leads are water cooled and vacuum tight seals are provided at the junctions. The device incorporates silver soldered copper tubes, polytetrafluoroethylene electrical insulators, and O-ring vacuum seals.
Grandy, G. L.↗
Ion exchange determines iodine-131 concentration in aqueous samples
Inorganic radioiodide in aqueous media is analyzed by separating the radioactive iodine-131 as the iodide ion on a silver chloride column. The activity in the final precipitate may be determined by beta or gamma counting.
Fairman, W. D.↗
Potassium plasma cell facilitates thermionic energy conversion process
Thermionic energy converter converts nuclear generated heat directly into high frequency and direct current output. It consists of a potassium plasma cell, a tantalum emitter, and a silver plated copper collector. This conversion process eliminates the steam interface usually required between the atomic heat source and the electrical conversion system.
Richards, H. K.↗
Technique eliminates high voltage arcing at electrode-insulator contact area
Coating the electrode-insulator contact area with silver epoxy conductive paint and forcing the electrode and insulator tightly together into a permanent connection, eliminates electrical arcing in high-voltage electrodes supplying electrical power to vacuum facilities.
Mealy, G.↗
Spacecraft power
Rollup solar array, thermoelectric failure mode testing, sterilizable battery, and surface potential of silver electrodes - spacecraft power
THERMOELECTRIC CONVERSION SYSTEM↗
Gravity gradient stabilization system elements and antenna structures Final report, Jun. 1965 - Dec. 1966
Production of silver plated, copper-beryllium alloy tubular booms and deployment mechanism for gravity gradient stabilization of space satellites
MANUFACTURING↗
Angular distributions and energy spectra of electrons transmitted through and reflected from elemental foils
Spectrometric determination of angular distributions and energy spectra of electrons transmitted through and reflected from carbon, aluminum, copper, silver, and gold foils
ANGULAR DISTRIBUTION↗