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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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Hydraulic valve absorbs impact energy generated in docking or joining of two large bodies by controlling energy release to avoid jarring shock. The area of exit porting presented to the hydraulic control fluid is directly proportional to the pressure acting on the fluid.
Ion plating technique keeps the substrate surface clean until the film is deposited, allows extensive diffusion and chemical reaction, and joins insoluble or incompatible materials. The technique involves the deposition of ions on the substrate surface while it is being bombarded with inert gas ions.
Tool joins a sleeve to a tube by explosive swaging, thus providing a leakproof, lightweight, and strong assembly. No new or different material is used in this method and therefore the thermal and galvanic properties are maintained.
Study of packaging of microminiature electronic components reveals methods of improving compatibility of lead materials, joining techniques, transfer molding concepts, printed circuit board materials, and process and material specifications.
Joining techniques for zero leakage ducts and tube connections
Joining, working, and structural properties of beryllium and beryllium alloys for spacecraft applications
Chemical vapor deposition welding below recrystallization temperatures for low temperature joining of refractory and nonrefractory metal aerospace structures
Si-Ge/cold/-Pb-Te/hot/ segmented thermocouples joined by bonding to tungsten intermediate, determining efficiency by measuring heat flux from cold side
Dissociative attachment and recombination, discussing resonance state joining and asymptotic physical state and projection operator techniques
Adapted cutter, driven by a hand-held, variable-speed power drill, is used in the field to cut J-bevels on the ends of stainless-steel or aluminum pipe to be joined by precision welding. With this tool an acceptable bevel is cut within 3 percent of the time required for grinding and filing.
Handbook gives information on the selection and application of welding, brazing, and soldering techniques for joining various metals. Summary descriptions of processes, criteria for process selection, and advantages of different methods are given.
Diffusion bonding of metals, discussing interface joining processes and application to flueric devices, jet engine servovalves and porous woven structures
Portable device for aligning surfaces of two adjacent wall or sheet sections for joining at point of junction
Thermocouple vacuum gauge joined to Apollo lunar sample return containers /ALSRC/, describing two step welding procedure with transition cylinder
Earth-pointing satellites joined by tether, discussing reel back and drag brake orbital deployment techniques and dynamic behavior
Air-bearing-pad principle, combined with monitoring system of the air-bearing force, prevents damage between electrical and mechanical connectors joining a large engine system to the test stand during remote mating. Pad provides a cushion between engine and test stand.
Welding technique produces more reliable joints than soldering. Investigation used different sizes of copper conductors and component lead ribbons, corrosion protection platings, and melting points of metals being joined. Optimum combination is gold-plated component lead ribbons and solder-plated copper conductors.
Each modular element consists of two hemispherical shells with material removed near their apexes to permit joining by a weldment to form a passage. Elements are welded together at their largest dimensions to form either a straight line continuous or a circular pressure vessel.