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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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At least 793 records · Page 44

All sources NASA NTRS DOE OSTI

NASA NTRS1966

Line-reversal measurements of excitation and electron temperature in a shock tube.

Population temperatures within argon-calcium plasma generated by reflected aerodynamic shock determined by spectral line-reversal method

SHOCK TUNNEL↗

NASA NTRS1966

Solid lubricants for extreme environments.

Graphite, molybdenum and tungsten sulfides and calcium fluoride effective as solid lubricants in extreme environments

ENVIRONMENTAL TESTING↗

NASA NTRS1967

Composites of porous metal and solid lubricants increase bearing life

Self-lubricating composites of porous nickel and nickel-chromium alloy impregnated with a barium fluoride-calcium fluoride eutectic, and a thin film of solid lubricant increase wear life of load bearing surfaces.

Sliney, H. E.↗

NASA NTRS1967

Hydrated multivalent cations are new class of molten salt mixtures

Electrical conductance and activation energy measurements on mixtures of calcium and potassium nitrate show the hydrated form to be a new class of molten salt. The theoretical glass transition temperature of the hydrate varied in a manner opposite to that of the anhydrous system.

Angell, C. A.↗

NASA NTRS1967

Oxide film on metal substrate reduced to form metal-oxide-metal layer structure

Electrically conductive layer of zirconium on a zirconium-oxide film residing on a zirconium substrate is formed by reducing the oxide in a sodium-calcium solution. The reduced metal remains on the oxide surface as an adherent layer and seems to form a barrier that inhibits further reaction.

Youngdahl, C. A.↗

NASA NTRS1966

Determination of the emissivity of materials Semiannual progress report, 15 May - 14 Nov. 1966

Emittance and thermal cycling tests of stainless steel tubes coated with iron and calcium titanate, and niobium-zirconium tubes coated with iron titanate

PROTECTIVE COATING↗

NASA NTRS1965

Solubility studies in alkali metals

Solubility parameters for niobium and zirconium in lithium and potassium, and calcium solubility in eutectic sodium potassium alloy

SOLUBILITY↗

NASA NTRS1967

Determination of the emissivity of materials Semiannual progress report, Nov. 15, 1966 - May 14, 1967

Emittance testing of calcium titanate and iron titanate coated stainless steel tubes and thermal cycling tests of iron titanate coated niobium-zirconium tubes

THERMAL EMISSION↗

NASA NTRS1967

Action of thyrocalcitonin in the teleost fish Ictalurus melas.

Mammalian porcine thyrocalcitonin extract effect on concentrations of serum calcium and phosphate in catfish

MAMMAL↗

NASA NTRS1968

Isotopically pure magnesium isotope-24 is prepared from magnesium-24 oxide

Apparatus is used to prepare isotopically pure magnesium isotope-24, suitable for use in neutron scattering and polarization experiments. The apparatus permits thermal reduction of magnesium-24 oxide with aluminum and calcium oxide, and subsequent vaporization of the product metal in vacuum. It uses a resistance-heated furnace tube and cap assembly.

Chellew, N. R.↗

NASA NTRS1968

High-emittance coatings on metal substrates

High-emittance coatings of iron, calcium, and zirconium titanates thermally sprayed on stainless steel, columbium-1 percent zirconium, and beryllium substrates promote and control radiative heat transfer from the metal substrates. Adherence, compatibility and emittance stability at elevated temperature and high vacuum were evaluated.

Emanuelson, R. C.↗

NASA NTRS1968