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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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Brazing retort manifold minimizes air contamination, prevents gas entrapment during purging, and provides uniform gas flow into the retort bell. The manifold is easily cleaned and turbulence within the bell is minimized because all manifold construction lies outside the main enclosure.
Electroplating method seals brazed or welded joints against gas leakage under high pressure. Any conventional electroplating process with many different metal anodes can be used, as well as the build up of layers of different metals to any required thickness.
Copper-based quaternary alloys of the solid solution type is used for vacuum furnace brazing of large stainless steel components at a maximum temperature of 1975 deg F. The alloy has high bonding strength and good ductility over a temperature range extending from the cryogenic region to approximately 800 deg F.
Measuring and correlating the thermal conductivity and ultrasonic transmission of seven hot-brazed-bonded copper plates established a relationship between heat transfer and ultrasonic transmission properties of the bonds. This relationship permits the prediction of heat transfer characteristics from ultrasonic transmission tests.
Americium 241 serves as a suitable radioisotope /gamma ray source/ and exposure probe for radiographic inspection of brazed aluminum joints in areas of limited accessibility. The powdered isotope is contained in a sealed capsule mounted at the end of a spring-loaded pushrod in the probe assembly.
Design and development of all welded and brazed instrumentation ports for nuclear engine for rocket vehicle applications reactors
Report details study made of nondestructive radiographic, ultrasonic, thermographic, and leak test methods used to inspect and evaluate the quality of the various brazed joints in liquid-propellant rocket engine components and assemblies. Descriptions of some of the unique equipment and methods developed are included.
Emission spectra and decomposition measurements to determine AeroZINE 50 compatibility with gold-based braze alloys
Brazing aluminum to titanium coated stainless steel to minimize formation of intermetallic compounds in joint
Process developed for brazing niobium-zirconium alloys for heat exchanger tube fabrication
Gold braze investigation of multicycle metallic reversing bladders
Aluminum-silicon fluxless brazing process for Apollo coldplate fabrication, noting pressure and corrosion test results
Brochures outline the tools, equipment, materials, and techniques used for joining tubes by automatic and semiautomatic welding and brazing. A few of the metals being joined are stainless steels of various diameters and thickness. Techniques have been developed for on-site or work-bench repair.
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.
Zirconium-based alloy brazing of internal fins of Cb-1Zr foil to Cb-1Zr heat receiver tubes
Furnace brazing butt joints in tungsten-uranium dioxide cermet cylinders at 3000 deg C
Nondestructive tests for determining braze bond quality of open face honeycomb seal rings, using low viscosity liquids with fluorescent additives