1,699 Result(s)
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English
Characterization and Evaluation of Materials
** Chung
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Complex-modulus measurement by longitudinal vibration testing
A simple method is presented to measure the complex modulus of suitably rigid, linear viscoelastic materials over the audio-frequency spectrum. The case is considered where one end of a rod of the material is ...
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Sound propagation, density, and viscosity in liquid3He
We have measured the temperature dependence of the velocity and the attenuation of sound in the range 60–700 mK. The maximum in the sound velocity observed by Abraham and Osborne is confirmed. The viscosity de...
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Some dynamic properties of axially loaded wire ropes
Results are presented on the transverse dam**, the transverse fundamental natural frequency as well as the longitudinal fundamental natural frequency for axially loaded wire ropes. Twelve different wire rope...
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Kinetics and mechanism of oxide formation and desorption for high temperature tantalum in dissociated oxygen
Exposure of tantalum filaments between 2400 and 2800 K to non-equilibrium partiallydissociated oxygen (1.6 x 10-2 ≦ Po ≦ 2.7 x 10-1 Pa) is shown to increase both the steady-state dissolved oxygen concentrationand
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Specific heat of para-hydrogen monolayers on graphite
The specific heat of para-hydrogen films has been measured from 1 to 20 K for areal densities between 0.01 and 0.055 atoms/Å 2 of the partial monolayer adsorbed on grafoil. The ...
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A general elongational flow experiment: Inflation and extension of a viscoelastic tube
The simultaneous inflation and extension of a tube is investigated as a method for conducting elongational flow experiments. This generally unsteady inhomogeneous deformation is restricted so that the material...
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Effect of hydrogen on fatigue crack propagation in vanadium
The influence of hydrogen on fatigue crack propagation in unalloyed vanadium and several hydrogen-charged vanadium alloys has been investigated. The Paris-Erdogan equation,da/dN =C(Δ.K)m, was approximately obeyed...
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Structural studies of graphite intercalation compounds
Electron diffraction through the c-face (layer planes) and scanning electron microscopy (SEM) on the a-face (perpendicular to the layer planes) have been used to study the intralayer crystal structure and the ...
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Electronic properties from analysis of the harmonic content of the de Haas-van Alphen effect: Application to dilute magnetic alloys
A new technique, third harmonic de Haas-van Alphen (dHvA) wave shape analysis, is described for measurement of the spin-dependent interactions between conduction electrons and local moments in dilute alloys. W...
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Fatigue behavior of niobium-hydrogen alloys
The effects of hydrogen on room temperature fatigue behavior of niobium were investi-gated under both high frequency stress control and low frequency strain control condi-tions, in air. Hydrogen markedly impro...
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Formation of cobaltic complexes by oxidation with potassium peroxymonosulfate in spectrophotometric determination of cobalt
The oxidation of cobaltous complexes of amino-polycarboxylic acids to their corresponding cobaltic complexes with potassium peroxymonosulfate has been studied for simple spectrophotometric determination of 10–...
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Theory of self-resonant modes with zero external magnetic field in Josephson tunneling junctions
The effect of self-resonant modes in the absence of external magnetic fields in Josephson junctions is investigated by solving the Josephson equation. The method is based on the assumption of no external magne...
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Effect of iron addition on the precipitation behavior of CoNiCr alloys containing Nb
The effect of iron addition on the precipitation behavior of Co-Ni-Cr-Nb alloys is discussed. Iron addition changes the main precipitate from orthorhombic β-Ni3Nb (Ni3Cb) to BCTγ″-phase which is disc shaped and p...
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Study of colour-develo** factors in spectrophotometric determination of cyanide by the pyridine-barbituric acid method
The decomposition of cyanide-pyridine-barbituric acid in the wavelength around λmax=583 nm gives rise to formation of a new color species around λmax=490nm. Both reactions are first-order reactions with the same ...
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A double pole, double throw electro-optic switch with an N-type electrode
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Properties of zero-field resonant modes in josephson junctions
The effect of an external magnetic field on zero-field resonances is investigated analytically. A calculation shows that the even-mode current height falls smoothly to zero as the external field strength is in...
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Yielding behavior of a γy-precipitation strengthened Co Ni Cr Nb Fe alloy
The yielding behavior of a 35 Co, 35 Ni, 15 Cr, 12 Nb, 3 Fe alloy, precipitation strengthened by an ordered bct γ phase has been studied. It was observed that during the early stages of aging at 973 K γ precip...
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Electrical properties of V2O5-PbO-GeO2 glasses
Glasses in the V2O5-PbO-GeO2 system containing 55 mol% V2O5 were found to undergo a droplet-type phase separation. The dispersed phase is rich in GeO2. The volume percent of this phase increases with increasing G...
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Determination of the plastic zone size by cancelling the singularity with proper crack-dislocation-density functions
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Correlation of the Crystal Structural and Microstructural Effects of the Interfacial Processes between Gold and GaAs
The solid state interfacial reaction between gold and GaAs, was found to result in small surface microstructural changes, whereas melting of the reaction product (tentatively identified as AuGa) and subsequent...
