Advanced refractory alloy corrosion loop program Quarterly progress report, 15 Oct. 1968 - 15 Jan. 1969
Purification of alkali metals, and progress in developing Rankine system corrosion loop
Harrison, R. W.↗
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Advanced refractory alloy corrosion loop program Quarterly progress report, 16 Apr. - 15 Jul. 1969
Alkali metal removal from Rankine corrosion test loop, and leakage investigation
Harrison, R. W.↗
Measurements of the work function and desorption energy of cesium and potassium on /100/ tungsten.
Work function and desorption energy measurements of alkali metals from metallic substrates with modulated molecular beam, noting surface contamination
Fehrs, D. L.↗
Chemical characteristics and origin of oceanic ridge volcanic rocks
Oceanic ridge volcanic rocks alkali metal, alkaline earth, rare earth, nickel and major element content, observing partial melting
Gast, P. W.↗
Analytical and experimental studies of thermionically emitting electrodes in contact with dense, seeded plasmas
Interactions between moving alkali-metal seeded dense plasma and metallic thermionically emitting electrode with surface properties influenced by seed particle absorption
Koester, J. K.↗
On the effect of helical-flow inserts on boiling pressure drop
Water and alkali metal boilers, predicting helical-flow-promoting inserts effect on pressure drop penalties by constant slip model
Stone, J. R.↗
Etching of aluminum for bonding Patent
Etching aluminum alloys with aqueous solution containing sulfuric acid, hydrofluoric acid, and an alkali metal dischromate for adhesive bonding
Emde, W. D.↗
Widths of optically thick lines
Resonance broadening measurements of alkali metals, giving relation between optically thick and thin full widths for Lorentzian and Gaussian line shapes
Exton, R. J.↗
Vaporization from heated lunar samples and the investigation of lunar erosion by volatilized alkalis
Alkali metals vaporization from heated lunar samples, suggesting lunar rock erosion by localized heating due to volcanism or meteorite impact
Derby, J. V.↗
Carbon dioxide concentrator
Passed exhaled air through electrochemical cell containing alkali metal carbonate aqueous solution, and utilizes platinized electrodes causing reaction of oxygen at cathode with water in electrolyte, producing hydroxyl ions which react with carbon dioxide to form carbonate ions.
Williams, C. F.↗
Al/Cl2 molten salt battery
Molten salt battery has been developed with theoretical energy density of 5.2 j/kg (650 W-h/lb). Battery, which operates at 150 C, can be used in primary mode or as rechargeable battery. Battery has aluminum anode and chlorine cathode. Electrolyte is mixture of AlCl3, NaCl, and some alkali metal halide such as KCl.
Giner, J.↗
Thermochemistry of tantalum-wall cooling system with lithium and sodium working fluids
Plots are presented which show the distribution of oxygen between liquid lithium and tantalum or niobium, and between liquid sodium and tantalum at elevated temperatures. Additional plots showing the composition of the gas phase above the solutions of oxygen and alkali metal are presented. The use of the plots is illustrated by an example tantalum heat pipe filled with lithium.
Tower, L. K.↗
Superconductivity in intercalated molybdenum disulfide.
X-ray studies show the existence of two different types of expansions of the intercalated unit cell in both Na and K compounds. Two different phases are also indicated in the superconducting behavior of the K compound. All intercalated samples studied show a superconducting transition. K and Rb compounds become superconductors in the temperature range from 6.5 to 6.0 K. The Na compounds become superconductors at about 4.5 K. In all cases, the superconductivity disappears upon a short exposure of the sample to air. This phenomenon confirms that the superconductivity is due to the presence of the alkali metal.
Somoano, R.↗
Ultraviolet reflective coating
Composition consists of dispersion of barium sulphate in aqueous solution of water-soluble inorganic binder. Binder is selected from group consisting of alkali metal sulphates. Coating exhibits high reflectance of ultraviolet light to wavelengths of approximately 200.0 nm, which compares favorably with high reflectance of virgin barium sulphate power.
Schutt, J. B.↗
Carbon dioxide adsorbent study
A study was initiated on the feasibility of using the alkali metal carbonate - bi-carbonate solid-gas reaction to remove carbon dioxide from the atmosphere of an EVA life support system. The program successfully demonstrates that carbon dioxide concentrations could be maintained below 0.1 mole per cent using this chemistry. Further a practical method for distributing the carbonates in a coherent sheet form capable of repeated regeneration (50 cycles) at modest temperatures (423 K), without loss in activity was also demonstrated. Sufficiently high reaction rates were shown to be possible with the carbonate - bi-carbonate system such that EVA hardware could be readily designed. Experimental and design data were presented on the basis of which two practical units were designed. In addition to conventional thermally regenerative systems very compact units using ambient temperature cyclic vacuum regeneration may also be feasible. For a one man - 8 hour EVA unit regenerated thermally at the base ship a system volume of 14 liters is estimated.
Onischak, M.↗
Vapor phase crystallization in Apollo 14 breccia.
The vugs contained in many of the highly recrystallized breccias from Apollo 14 are discussed, along with the well-developed crystals of plagioclase, pyroxene, ilmenite, apatite, whitlockite, iron, nickel-iron, and troilite that extend from the vug walls and bridge open spaces. These crystals are interpreted as having formed by deposition from a hot vapor containing oxides, halides, sulfides, alkali metals, iron and possibly other chemical species. The hot vapor was associated with the thermal metamorphism and subsequent cooling of the Fra Mauro formation after it had been deposited as an ejecta blanket by the Imbrian impact.
Mckay, D. S.↗
Measurement of radiation exposure of astronauts by radiochemical techniques
A cosmic radiation dose to the Apollo 17 crew of 1.3 R was calculated from the specific activities of Na-24 in their postflight urine specimens. The specific activities of K-42, Cr-51, Co60, and Sb-124, introduced by injection into the astronauts, are extremely high in these specimens. The Fe-59 and Cs-137 levels are also reported and appear to be normal. The concentrations of Na, K, Rb, Cs, Ca, Sr, Ba, Cr, Fe, Co, Ag, Au, Zn, Cd, Hg, Sn, As, Sb, Se, Br, Sc, La, Sm, Eu, Tb, Hf, Ta, and Th were measured in urine specimens from the Apollo 17 astronauts by neutron activation analysis. Strontium, barium, gold, cadmium, lanthanum, samarium, europium, terbium, thorium, and tin are reported for the first time. The concentrations or excretion rates of bromine and the alkali metals exhibit singificantly reduced postflight levels and are generally lower than values observed for previous missions. Chromium concentrations reflect radiochromium injections.
Brodzinski, R. L.↗
Nonflammable coating compositions
Nonflammable coating compositions are described for use in high-oxygen environments which include an aqueous suspension of synthetic mica, an alkali metal silicate gelant and a waterbase latex resin emulsion. Inorganic white and/or color pigments and additives such as glass microballoons are employed to provide a wide range of colors and optical properties.
Krupnick, A. C.↗