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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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Vapor-deposited sintering technique increases the feasible temperature range of transpiration-cooled structural members in combustion chambers. This technique produces a porous mass of refractory metal wires around a combustion chamber structural member. This mass acts as a transpiration-cooled surface for a thick-walled tube.
Comprehensive report studies the reaction of flowing steam with refractory metals /in particular molybdenum/, in the temperature range of 1100 degrees C. The reaction products are hydrogen gas and molybdenum oxide vapor.
Tungsten fiber-reinforced nickel superalloy combines the strength of refractory metals with the oxidation resistance of superalloys. Knowledge of the relationship between fabrication technique, matrix compositions and fiber sizes minimized fiber-matrix reaction. Potential application includes high temperature turbine components.
Changes in structure and mechanical properties of refractory metal alloys induced by titanium interstitial sink
Coated tantalum alloys and refractory metal coatings for leading edge regions of hypersonic cruise vehicles
Alloying and strengthening mechanisms for heat resistant refractory metals
Creep test data on refractory metal alloys for use in spacecraft power supply systems
Design, fabrication and testing of Cb-1Zr thermal convection loop for evaluation of refractory metals in boiling and condensing potassium environments
Adsorption integral cesium reservoir containing porous refractory metal substrates, determining cesium contents in life test converter components by neutron activation analysis
Surface electron and ion emission from refractory metal compounds in cesium vapor, showing electron emission S curves and surface ionization critical temperature envelopes
Vapor pressure data extrapolated to very high pressures for carbon and refractory metals with thermal absorption cross sections below five barns
Graphite cloth source for SiO evaporation, discussing advantages of resistivity, mechanical flexibility and economy over refractory metals
Refractory metal coatings protective capabilities in rocket engine propulsive environment evaluated for effectiveness
Refractory metal alloys related phases in ternary systems, noting atomic radius and shell electron concentration effects
Creep rate equations for refractory metal alloys of tantalum molybdenum, and columbium
Creep analysis of refractory metal alloys at high temperatures under ultrahigh vacuum conditions
Refractory metal and graphite composite research for solid propellant rocket nozzle applications
Technique joins titanium or one of its alloys to materials, such as iron, nickel or cobalt base material, or to refractory metals. To ensure formation of a satisfactory bond, the temperature, time, environment and pressure must be controlled.