Superconducting properties of niobium-titanium- nitride thin films
Superconducting properties of Nb-Ti-N thin films prepared by reactive sputtering process, obtaining transition temperature maximums
Deis, D. W.↗
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Welding columbium-stainless bimetal tubing
Welding techniques for Nb-stainless steel bimetal tubing for liquid metal containment, determining structural integrity and bond interface condition after thermal cycling
Stoner, D. R.↗
Preparation and properties of superconducting thin films of beta-tungsten structure compounds
Superconducting thin films of beta-tungsten structure Nb-Al-Ge compound, discussing high purity sputtering preparation techniques and properties in magnetic fields
Gavaler, J. R.↗
Surface damage from high-velocity flow of lithium
Nb-Zr alloy and yttria corrosion by high velocity Li flow, discussing material removal depth
Hays, L. G.↗
Force-reduced superconducting toroidal magnet coils
Force-reduced superconducting toroidal magnet coils built with Cu plated Nb-Zr wire, investigating current enhancement characteristics
Boom, R. W.↗
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.↗
Magnetic flux flow in a Type 2 superconductor
Flow measurement of magnetic flux in Nb-Zr superconductor to infer magnetic induction and currents in material
Urban, E. W.↗
Flux flow and a new critical-current formula
Time linear increase of magnetic flux flow through superconducting Nb-Zr wall, inferring empirical critical current density model agreement with measured flow rate
Urban, E. W.↗
X-ray study of the Debye-Waller factor of Nb3Sn
Debye-Waller factors for Nb and Sn atoms in intermetallic niobium stannide by X ray intensity measurements on single crystal
Vieland, L. J.↗
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.↗
Computer-acquired performance map of an etched-rhenium, niobium planar diode
Computer acquired performance mapping of fixed spaced planar diode with etched Re emitter and Nb collector over wide operating temperature range
Lancashire, R. B.↗
The mechanical response of the Ni-Ni3Nb eutectic composite. I - Monotonic behavior. II - Cyclic behavior
Ni-Ni Nb eutectic composite, investigating monotonic mechanical response, deformation and fracture mechanisms
Hertzberg, R. W.↗
Synthesis of Nb3Sn by shock waves
Superconducting Nb-Sn intermetallic compound synthesis from elemental powders by converging shock waves
Otto, G.↗
Insulating effectiveness of self-spacing dimpled foil
Experimental data are graphed for determining conductive heat losses of multilayer insulation as function of number of foil layers. Foil was 0.0051 cm thick Nb, 1% Zr refractory alloy, dimpled to 0.0254 cm with approximately 28 dimples/sq cm. Heat losses were determined at 0.1 microtorr between 700 and 1089 K.
Bond, J. A.↗
Niobium hyperfine structure in crystal calcium tungstate
A study of the niobium hyperfine structure in single crystal calcium tungstate was made by the combination of the technique of electron paramagnetic resonance and electron nuclear double resonance (EPR/ENDOR). The microwave frequency was about 9.4 GHz and the radio frequency from 20MHz to 70 MHz. The rare earth ions Nd(3+), U(3+), or Tm(3+) were added as the charge compensator for Nb(5+). To create niobium paramagnetic centers, the sample was irradiated at 77 deg K with a 10 thousand curie Co-60 gamma source for 1 to 2 hours at a dose rate of 200 K rads per hour and then transferred quickly into the cavity. In a general direction of magnetic field, the spectra showed 4 sets of 10 main lines corresponding to 4 nonequivalent sites of niobium with I = 9/2. These 4 sets of lines coalesced into 2 sets of 10 in the ab-plane and into a single set of 10 along the c-axis. This symmetry suggested that the tungsten ions are substituted by the niobium ions in the crystal.
Tseng, D. L.↗
Diminiode performance data with an ASTAR-811C emitter and a niobium - 1-percent-zirconium collector
The performance of a fixed-space planar miniature diode (diminiode) with a guarded collector has been mapped using a computerized data acquisition facility. The electrode materials consisted of a tantalum alloy emitter and a Nb-1Zr collector; the electrode gap was 0.254 mm.
Smith, A. L.↗
Fabrication studies of Nb3Al superconductors
A study aimed at fabricating a stabilized conductor containing both binary and ternary intermetallics of the Nb-Al system is presented.
Laurence, J. C.↗
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.↗