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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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Thin tungsten wire and tungsten tubing are brazed together using a contacting coil of nickel wire heated to its melting point in an inert-gas atmosphere. This method is also effective for brazing tungsten to tungsten-rhenium parts.
High temperature thermocouple research and development program - thermocouples with thermochemically formed tungsten sheath and tungsten rhenium center conductor
Vacuum deposition of gold thin films on nickel, nickel-chromium, and nickel-rhenium substrates for use as lubricants
Thermocouple continuously measures a flowing gas up to 4500 degrees F in a hazardous environment. The thermocouple combines rhenium and tungsten in the probe, housing, and swaged extension lead. The wires extend continuously from the cold junction to the probe tip to eliminate errors from secondary thermocouple effects.
Specimen thermionic emitters were electropolished and electroetched to study the effect of surface preparations on improving thermionic emission. The best technique found was to electropolish the annealed rhenium surface and then electroetch it. The effect of electroetching was to remove other crystal planes faster than basal planes.
Uranium oxide as nuclear fuel when in contact with tungsten, molybdenum and tungsten-25 percent rhenium thermionic emitter
Solid solution and carbide strengthened arc melted alloys of hafnium with tungsten and ternary alloys of tantalum, columbium, rhenium and carbon
Alloy combines superior strength at elevated temperatures with improved ductility at lower temperatures relative to unalloyed tungsten. Composed of tungsten, rhenium, hafnium, and carbon, the alloy is prepared by consumable electrode vacuum arc-melting and can be fabricated into rod, plate, and sheet.
Thermionic converter performance, electron emission and work functions of vapor-deposited rhenium samples, and electron emission microscope design and micrographs
Composite material, made by dispersing short tungsten-rhenium fibers randomly throughout zirconium oxide, is highly resistant to oxidizing environments at temperatures above 2000 degrees F. This reinforced ceramic is also thermal stress resistant.
Physical and mechanical properties of rhenium, technetium, hafnium, noble metals, and related alloys reviewed in terms of availability and costs
High temperature ultrasonic temperature measurements in nuclear rocket engine to determine feasibility of rhenium sensor as high temperature sensor
Solar Energy Thermionic /SET/ generator design using converters with rhenium emitters
Single crystal molybdenum and rhenium electrodes for low work function collectors in thermionic converters
Thermal and performance analysis for thermionic converters with rhenium and palladium collectors, noting emitter-temperature errors
Interdiffusion in rhenium emitters fabricated by pressure bonding tested with electron beam, discussing thermal cycling effect
Process impregnates polytetrafluoroethylene /PTFE/ with rhenium or molybdenum compounds. The refractory metals impregnated PTFE combines chemical inertness with electrical conductivity. They are useful for electro-chemical cells, chemical processing equipment, catalysts, electrostatic charge removal, RF gasketing, and cable shielding.
Design, fabrication, and test of advanced rhenium alloy electrode thermionic converters