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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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Refractory coating protects graphite heater elements operating at high temperature in a hydrogen atmosphere. The coating is formed by painting the graphite elements with a composition containing powdered tungsten, and heat-treating it.
Foamed refractory oxides provide lightweight, reflective thermal insulation materials. The materials have a low bulk density and high thermal shock resistance.
Acrylic enamel spray containing metallic copper pigment lubricates refractory metal tubing during cold drawing operations so that the tubing surface remains free from scratches and nicks and does not seize in the die. Zirconium alloys, zirconium, tantalum alloys, niobium alloys, vanandium alloys and titanium alloys have been drawn using this lubricant.
Sealing hydraulic fluid within a tube and passing the tube through a reducing die produces high quality small diameter refractory metal tubing. The encased fluid eliminates the need for mandrel or ductile core removal and drawing can proceed with less handling operations.
Multilayer rocket nozzles formed by plasma spraying have good thermal shock resistance and can be reheated in an oxidizing environment without loss of coating adherence. Suggested application of this process are for the production of refractory components, which can be formed as surfaces of revolution.
Plating process welds, bonds, and seals refractory metals without weakening or changing the structure of the base metals. A metal halide compound in the vapor phase is decomposed to deposit filler metal on the base metal. The resulting bond is a true metal-to-metal bond.
Refractory bimetallic tubing bond quality testing by metallographic and ultrasonic inspection
Specially designed torch welds refractory metals in a vacuum purged, inert gas backfilled welding chamber /weld box/ with practically zero contamination resulting from its use. Included in the torch design is a radiation shield to protect the operators hands when welding at high amperages.
Thermodynamic properties of interstitial elements in refractory metals
Fabrication and evaluation of Rankine system refractory alloy corrosion test loop
Fabrication and evaluation of Rankine system refractory alloy corrosion test loop
Microbend tester and heat-treating apparatus development for study of high temperature protective coatings for refractory metals
High temperature protective coatings for refractory metals
Vapor pressure data to 1000 atmospheres for refractory elements with low thermal absorption
Creep test data on refractory metal alloys for use in spacecraft power supply systems
Neutronic calculations of fuel and poison drum control of refractory metal, fast spectrum space power reactors
High temperature research on creep rupture strength of refractory metal fiber and nickel alloy composites
Refractory alloys applications to space electric power conversion systems, discussing alkali metal Rankine cycle systems and corrosion and erosion tests