Comparative study of Li, Na, K, Rb, Cs, Ca, Sr and Ba abundances in achondrites and in Apollo 11 lunar samples
Chemical analysis for Li, Na, K, Rb, Cs, Ca, Sr and Ba in achondrites and Apollo 11 lunar rocks, breccia and soil samples
Burnett, D. S.↗
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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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Argon-40/argon-39 dating of lunar rock samples
Apollo 11 crystalline rocks chemical analysis by argon 40/argon 39 dating techniques
Turner, G.↗
Search for alkanes of 15-30 carbon atom length in lunar fines
Apollo 11 lunar fines chemical analysis for alkanes of 15-30 carbon atom length, obtaining negative results
Cordes, E.↗
On methods for determining the composition of pyrolysis products from ablative composites
Charring ablative composites pyrolysis products composition determination, comparing chemical analysis techniques
April, G. C.↗
1970 NASA/GSFC Battery Workshop
NASA/GSFC workshop on materials processing, chemical analysis, cell processing, and testing of batteries for aerospace applications
Source record↗
Nickel cadmium plaques and plates
Chemical analysis of active materials of nickel cadmium battery plates
Parry, J. M.↗
Extraction of the negative plate
Chemical analysis and electrical performance tests of nickel cadmium batteries for Intelsat 4 program
Dunlop, J. D.↗
Applications of 'artificial intelligence' for chemical inference. VI - Approach to a general method of interpreting low resolution mass spectra with a computer
Computerized method of interpreting low resolution mass spectra in organic chemical analysis, describing inference maker program applications and results
Buchanan, B. G.↗
On the origin of lunar soil 12033
Lunar soil 12033 bulk chemical analysis, suggesting mixture of exotic component with local soil in 41/59 proportion
Beadecker, P. A.↗
Meteoritic particles in the soil surrounding the Henbury meteorite craters
Meteoritic material magnetic fraction determination by chemical analysis for spherules in soil surrounding meteorite craters at Henbury, Australia
Hodge, P. W.↗
Computer controlled operating and data handling system for a quadrupole mass spectrometer
Computer controlled data handling system for quadrupole mass spectrometer performing on-line chemical analysis of rocket chamber combustion gases
Hafner, F. W.↗
In vivo and in vitro determinations of body fat and body water in the hamster
Hamster body fat, water and density measurements by dilution method and air displacement technique, comparing to determination by direct chemical analysis upon sacrificing
Kodama, A. M.↗
The nature of the surface of the moon
Moon surface electrical conductivity, seismic transmission properties, dust components, chemical analysis and comparison to earth
Gold, T.↗
Comparative electron petrography of Apollo 11, Apollo 12, and terrestrial rocks
Comparative electron petrography and chemical analysis of Apollo 11 and 12 and terrestrial rocks, noting pyroxene, plagioclase, ilmenite and cristobalite
Christie, J. M.↗
The boiling point of stratospheric aerosols.
A photoelectric particle counter was used for the measurement of aerosol boiling points. The operational principle involves raising the temperature of the aerosol by vigorously heating a portion of the intake tube. At or above the boiling point, the particles disintegrate rather quickly, and a noticeable effect on the size distribution and concentration is observed. Stratospheric aerosols appear to have the same volatility as a solution of 75% sulfuric acid. Chemical analysis of the aerosols indicates that there are other substances present, but that the sulfate radical is apparently the major constituent.
Rosen, J. M.↗
Properties of Hot Pressed Titanium Alloy Powders for Cryogenic Applications.
Evaluation of strength and toughness of hot-pressed titanium alloy powders at room and at cryogenic temperatures. The purpose was to determine how the mechanical properties of solid bodies formed from powder would compare with wrought specimens of the same size and with the same chemical analysis. It was found that of five titanium powder-making processes investigated, only the Rotating Electrode Process (REP) was capable of producing ELI-grade titanium alloy powder. Blocks hot-pressed from spherical REP powders had tensile properties equivalent to or better than those obtained from wrought bar.
Friedman, G. I.↗
Eutectic Experiment Development for Space Processing
A ground base test plan and a specimen evaluation scheme have been developed for the aluminum-copper eutectic solidification experiment to be run in the M518 multipurpose electric furnace during the Skylab mission. Besides thermal and solidification studies a detailed description is given of the quantitative metallographic technique which is appropriate for characterizing eutectic structures. This method should prove a key tool for evaluating specimen microstructure which is the most sensitive indicator of changes produced during solidification. It has been recommended that single grain pre-frozen eutectic specimens be used to simplify microstructural evaluation and to eliminate any porosity in the as-cast eutectic specimens. High purity (99.999%) materials from one supplier should be employed for all experiments. Laboratory studies indicate that porosity occurs in the MRC as-cast eutectic ingots but that this porosity can be eliminated by directional freezing. Chemical analysis shows that the MRC ingots are slightly Al rich and contain about .03% impurity. Because of the impurity content the lower cooldown rate (1.2 C/min) should be used for eutectic freezing if MRC material is used in the M518 furnace.
Hopkins, R. H.↗
Techniques for lithium removal from 1040 C aged tantalum alloy, T-111
The liquid ammonia and vacuum distillation techniques were found to be satisfactory for removing lithium from 1040 C aged T-111 (tantalum - 8-percent tungsten- 2-percent hafnium). Results of ductility tests and chemical analysis show that these two methods are adequate for removing lithium without embrittlement or contamination of the T-111. Moist air exposure of T-111 with traces of lithium on the surface produced mixed results. Some specimens were ductile; others were brittle. Brittle T-111 had an increased hydrogen content. Water removal of lithium from T-111 caused brittleness and an increased hydrogen concentration.
Gahn, R. F.↗