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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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Creep tests of arc-cast and vapor deposited tungsten, molybdenum alloys, niobium, and tantalum base alloys for use in advanced power systems
Dimple, spall, and perforation of aluminum, niobium, and steel plates under hypervelocity impact
Applicability of iridium as protective coating for refractory metals - rates of interdiffusion of iridium with tungsten, molybdenum, and niobium
Solubility of pure iron, molybdenum, niobium, and tantalum in liquid potassium
Reciprocating pump maintains a precise level of liquid helium in a cryostat. The pump contains a niobium solenoid armature that is maintained in a superconductive state by the liquid helium.
Investigation studied the long term operation of miniature slip ring assembles in high vacuum of space and included the influence of ring, brush, and insulator materials on electrical noise and mechanical wear. Results show that soft metal vapor plating and niobium diselenide miniature slip rings are beneficial.
Ceramic insulated, swaged stainless steel, sheathed, protective atmosphere cable admits electrical leads into an 1800 deg F air-environment test chamber. The cable has some bending capability and provides for nine niobium alloy conductors. An argon purge during the TIG weld closure protects internal wires from oxidation and embrittlement.
Emittance and thermal cycling tests of stainless steel tubes coated with iron and calcium titanate, and niobium-zirconium tubes coated with iron titanate
Fused salt electrodeposition and examination of iridium protective coatings on tungsten, molybdenum, and niobium
Carbon and nitrogen stabilization in stainless steel and its effect on mass transfer in stainless steel niobium one percent zirconium potassium systems
Joining of refractory-austenitic bimetal tubing of niobium and stainless steel using electron beam, gas tungsten arc, and plasma arc welding techniques
Hall effect and electric resistance of zirconium carbide niobium carbide and tantalum carbide hafnium carbide alloys
Partial molar free energies, enthalpies, and entropies of carbon dissolved in solid molybdenum, tungsten, niobium, and tantalum
Effect of carbide content on physical and mechanical properties of niobium carbide graphite and tantalum carbide graphite composites
Molybdenum disulfide lubricant film is deposited on two substrates, niobium and nickel-chromium alloys, by means of physical direct-current sputtering. The sputtering system uses a three-electrode /triode/ geometry - a thermionic cathode, an anode, and the target, all enclosed in a vacuum chamber.
Sensor consisting of superconductive film mounted on a dipstick measures the level of liquid helium in a Dewar flask. The sensor is made by depositing a thin film of niobium metal to a thickness of 2000 angstroms on a quartz substrate, which is then mounted on a graduated dipstick.
Carbon sources effects on niobium carbides, and determination of high temperature flexural strength, flexural creep, and thermal expansion up to 2550 deg C for various materials
Operational characteristics of two loop lithium boiling potassium system of niobium zirconium Rankine cycle test loop