Dielectric properties of reactively sputtered films of aluminum nitride.
Resistivity, capacitance and dielectric loss measurements for diode reactive sputtering grown AlN films and film sandwich structures of Ta, Au and Al films
Francombe, M. H.↗
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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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Resistance of tantalum in the intermediate /superconducting-normal/ state.
Ta type I and II wire resistance in transverse magnetic field during superconducting to normal transition, discussing strain and impurity effects
Gatos, H. C.↗
Critical current enhancement by precipitation in tantalum-rich zirconium alloys
Critical current density enhancement in Ta-rich Zr alloys in magnetic fields at low temperature after aging
Gatos, H. C.↗
Corrosion of oxygen contaminated tantalum in NaK
Threshold oxygen concentration for corrosion determined for Ta specimens subjected to low pressure contamination in NaK
Harrison, R. W.↗
Corrosion of oxygen contaminated tantalum in NaK
Ta oxygen concentration effects on corrosion resistance to NaK in SNAP 8 boilers
Harrison, R. W.↗
Field emission in high magnetic fields
Strong magnetic fields effect on field emission currents in Bi, Zn, Ta and W
Flood, D. J.↗
Some investigations of refractory metal systems of thermionic interest
Investigating interdiffusion of W-Ta, W-Mo, and W-Nb systems in refractory temperature range
Horner, M. H.↗
Materials technology program for a compact fast reactor for space power
Production engineering and compatibility tests of Ta-8W-2Hf clad UN nuclear fuel element for use in lithium cooled space power unit reactors
Gluyas, R. E.↗
Sputtered fuel cell electrodes
Fuel cell electrodes preparation by sputtering thin Ta and Pt layers on porous Vycor
Asher, W. J.↗
Spectral emissivity of tantalum in the red and in the green, and the change in emissivity resulting from a change in surface structure induced by heat treatment
Ta spectral emissivity in red and green and relationship to surface structure change induced by heat treatment
Madjid, A. H.↗
Recently developed coatings for tantalum, columbium and TD alloys
Protective coatings of Ta, Nb and TD alloys for high performance thermal protection systems, discussing space shuttle reentry heat shield
Shoemaker, H. E.↗
Kinetics of interaction of tantalum disilicide with tantalum and other metals
Tantalum disilicide kinetic interaction with Ta, investigating formation rate at varous temperatures
Graff, R. A.↗
Local forced convection boiling heat transfer of wetting mercury in a single tube with vortex insert
Local forced convection heat transfer data and empirical correlations for boiling Hg in single wetted Ta tube with composite helical inserts
Hsia, E. S.↗
Materials technology program for a compact fast reactor for space power
Materials technology of Ta-W-Hf clad uranium mononitride fuel for lithium cooled compact fast space power reactor, including irradiation tests
Gluyas, R. E.↗
Measured drift of irradiated and unirradiated W3 percent Re/W25 percent Re thermocouples at a nominal 2000 K
Neutron irradiated and unirradiated Ta sheathed BeO insulated grounded junction thermocouples drift measurement
Heckelman, J. D.↗
Alloy softening in binary molybdenum alloys
An investigation was conducted to determine the effects of alloy additions of Hf, Ta, W, Re, Os, Ir, and Pt on the hardness of Mo. Special emphasis was placed on alloy softening in these binary Mo alloys. Results showed that alloy softening was produced by those elements having an excess of s+d electrons compared to Mo, while those elements having an equal number or fewer s+d electrons than Mo failed to produce alloy softening. Alloy softening and hardening can be correlated with the difference in number of s+d electrons of the solute element and Mo.
Stephens, J. R.↗
Development study of compositions for advanced wrought nickel-base superalloys
Using NASA IIb as a base composition, the effects of five key elements (carbon, tungsten, tantalum, aluminum, and hafnium) on resultant properties were investigated in an effort to optimize the composition and derive new wrought high temperature alloys with improved strength characteristics. A total of nineteen compositions were melted, extruded, and rolled to bar stock using thermomechanical processing. Both full and partial solution heat treatments were developed for the compositions. Tensile properties from room temperature to 1800 deg F, stress and creep rupture properties to 1800 deg F, and thermal stability characteristics were evaluated. NASA IIb-7 exhibited the best response to the partial solution heat treatment for optimum properties up to 1200 deg F. The alloy contained 0.13C, 9.0 Cr, 9.0 Co, 2.0 Mo, 7.5 W, 10.0 Ta, 3.5 Al, 0.75 Ti, 0.02 B, 0.10 Zr, 0.50 V, 1.0 Hf, and balance nickel.
Kent, W. B.↗
Calculation of radiation induced swelling of uranium mononitride using the digital computer program CYGRO 2
Fuel volume swelling and clad diametral creep strains were calculated for five fuel pins, clad with either T-111 (Ta-8W-2.4Hf) or PWC-11 (Nb-1Zr-0.1C). The fuel pins were irradiated to burnups between 2.7 and 4.6%. Clad temperatures were between 1750 and 2400 F (1228 and 1589 K). The maximum percentage difference between calculated and experimentally measured values of volumetric fuel swelling is 60%.
Davison, H. W.↗