Precise Measurements of the Density and Critical Phenomena Near the Phase Transitions in Helium Using High-Q Niobium Microwave Cavities
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high-q niobium lambda point experiment↗
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Precision Clocks Using Superconducting Niobium Cavities
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High-Q cavities precise time-keeping planetary nav↗
Characterizing Microstructure and Properties of a Niobium Alloy Subject to Various Heat-Treatments
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L-PBF additive manufacturing↗
Omega phase precipitation and superconducting critical transport currents in titanium-22 at. pct niobium /columbium/.
Omega phase precipitation and superconducting crital transport currents in Ti-Nb wire samples
MAGNETIC FIELD↗
On the anisotropy and temperature dependence of ultrasonic attenuation in the mixed state of niobium.
Ultrasonic attenuation in pure Nb mixed state for magnetic field near second critical strength, noting field orientation and temperature effects
Garbuny, M.↗
The performance of a rhenium, niobium cylindrical thermionic converter.
Rhenium Nb cylindrical thermionic converter, measuring efficiency and power density in emitter temperature range 1600-2050 K and collector temperature range 873-1173 K
Kascak, T. J.↗
Steady-state flux jumping in superconducting niobium titanium tubes in superimposed AC and DC magnetic fields.
Steady state flux jumping for thin walled tubular superconducting NbTi subjected to coaxial superimposed AC and DC magnetic fields, discussing effective resistivity
Dubeck, L.↗
Fabrication of tunnel junctions on niobium films.
Tunnel junctions with low background currents made by reacting active gas layer adsorbed on Nb film surface with Pb upper film to form barrier
Mullen, L. O.↗
High field properties of pure niobium nitride thin films.
NbN thin film production by refined reactive sputtering technique, discussing Pauli spin paramagnetism and spin orbit scattering in high field superconductivity
Deis, D. W.↗
The thermodynamic properties of gaseous niobium chlorides.
Nb-gaseous Nb chlorides equilibrium from transpiration measurements at 800-1400 C, confirming importance of Nb pentachloride, Nb tetrachloride and Nb trichloride
Cubicciotti, D.↗
Ternary superconducting alloys of the titanium- niobium-vanadium system - Transition temperature variation
Superconducting transition temperature variation in bcc region of Ti-Nb-V ternary alloys measured as function of valence electrons and composition
Bellin, P. H.↗
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.↗
Correlation expression for the performance of an etched-rhenium emitter, niobium collector, cesiated thermionic converter
Numerical analysis of relationship between current, voltage, emitter temperature, and collector temperature of cesiated thermionic converter
Breitwieser, R.↗
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.↗
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.↗
Theoretical analysis of swelling characteristics of cylindrical uranium dioxide fuel pins with a niobium - 1-percent-zirconium clad
The relations between clad creep strain and fuel volume swelling are shown for cylindrical UO2 fuel pins with a Nb-1Zr clad. These relations were obtained by using the computer code CYGRO-2. These clad-strain - fuel-volume-swelling relations may be used with any fuel-volume-swelling model, provided the fuel volume swelling is isotropic and independent of the clad restraints. The effects of clad temperature (over a range from 118 to 1642 K (2010 to 2960 R)), pin diameter, clad thickness and central hole size in the fuel have been investigated. In all calculations the irradiation time was 500 hours. The burnup rate was varied.
Saltsman, J. F.↗
Fatigue hardening in niobium single crystals.
Nb single crystals of various orientations were cyclically deformed in tension-compression under strain control. At low strain amplitudes all crystals oriented for single slip and some oriented for multiple slip showed a two stage hardening. When present, the first stage was characterized with almost no cyclic work hardening. The rate of hardening in the second stage increased with strain amplitude and the amount of secondary slip. In crystals oriented for single slip kink bands developed on their side faces during rapid hardening stage which resulted in considerable amount of asterism in Laue spots. A cyclic stress-strain curve independent of prior history was found to exist which was also independent of crystal orientation. Furthermore, this curve differed only slightly from that of polycrystalline Nb obtained from data in literature.
Doner, M.↗
Rapid method for determining nitrogen in tantalum and niobium alloys
Adaptation of commercial instrument which measures nitrogen and oxygen in steel gave results in less than four minutes. Sample is heated in helium atmosphere in single-use graphite crucible. Platinum flux facilitates melting of sample. Released gases are separated chromatographically and measured in thermal-conductivity cell.
Merkle, E. J.↗