Materials Literature
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We have studied the relative rates of oxidative corrosion of U–Nb alloys containing 2–8 wt. % Nb, using x-ray photoelectron spectroscopy and depth profiling by sputtered neutrals mass spectroscopy. The alloys have been characterized after exposure to dry and humidified air (up to 50% relative humidity) at temperatures…
We characterize the local Li structure in the low-temperature phase of LixC60 with 6⩽x⩽15 using single and multiple-quantum Li7 nuclear magnetic resonance spectroscopy. We find clear evidence for Li cluster intercalated structures in all compositions. The inferred cluster sizes are significantly smaller than those sug…
XPS spectra are reported for a well-ordered Ni2P (0001) surface. These are the first reported photoemission spectra for this transition metal phosphide in single crystal form. Ion bombardment and annealing produces an ordered surface.
Abstract Rietveld refinement and the final model for pure κ -alumina are presented. The starting model was obtained through total energy calculations based on first principles. The resulting geometry parameters are within intervals of expected values for octahedral and tetrahedral coordina-tions. This result thus serv…
Abstract Measurements of the contact angle for water, glycerol, formamide, ethylene glycol, and diiodomethane on polymethyl methacrylate covered by adsorptive bovine serum albumin (BSA) films were made. Adsorption was performed from solutions in the concentration range 0–100 g/L. From the obtained contact angles the L…
Abstract In‐depth imaging of subsurface structures in scanning electron microscopy (SEM) is usually obtained by detecting backscattered electrons (BSE). For a layer‐by‐layer imaging in BSE microtomography, it is preferable to use an energy filtering of BSE. A simple approach is used to estimate the contrast by using b…
Solid state thin film batteries with MoO 3- x films as their cathode active material exhibit good battery performance. The chemical composition of the MoO 3- x thin film has been difficult to determine by chemical analysis, because of the difficulty in weighing ultra light samples located on massive substrates. To sur…
The beamline BL43IR at SPring-8 has been constructed as a beamline exclusively dedicated to the infrared spectroscopy. The beamline was designed to make use of infrared synchrotron radiation emitted from a bending magnet of 39.3 m bending radius with the acceptance angle of 36.5(H)×12.6(V) mrad2 and to cover a very wi…
Ultrafine Ni/sub 0.63/Zn/sub 0.17/Cu/sub 0.2/Fe/sub 2/O/sub 4/ powders and thin films were fabricated by a sol-gel method and their magnetic and structural properties were investigated with thermogravimetric and differential thermal analysis (TG-DTA), X-ray diffractometer (XRD), transmission electron microscope (TEM),…
Magnetic properties of new intermetallics FeVSn and CoVSn are reported. Both materials belong to the group of semi-Heusler compounds, with lattice parameters of 0.593 and 0.598 nm respectively in a cubic MgAgAs structure. X-ray investigations indicate partial atomic ordering in both cases. Ferromagnetic order was obse…
The McLachlan equation, which incorporates both effective medium models and percolation, was used to predict the volume fraction–conductivity relationships of insulator–conductor composites, and results were compared with experimental data. Two composite systems were investigated (BN–B 4 C and BN–SiC). Both systems ar…
In the last years bent banana-shaped mesomorphic molecules found an increasingly great interest among theoreticians and experimentalists due to the nature of this type of liquid crystals to exhibit a spontaneous polarization in the absence of any chiral group in the molecules. Similar property was found in mesomorphic…
A novel concept of hydrogen-facilitated dissolution has been introduced to describe stress corrosion cracking (SCC) in metals under hydrogen, stress and dislocation effect. Related experiments for pipeline steels in dilute bicarbonate solution were conducted to support the proposed mechanism. Slow-strain-rate tests (S…
We report photoinduced effects on a liquid crystal comprising of bent-core molecules, doped with a photoactive azobenzene compound and exhibiting the recently discovered “banana” B2 mesophase. The photoisomerization of the azobenzene molecules, brought about by the UV radiation, hardly changes the B2-isotropic transit…
The equal channel angular extrusion (ECAE) process has been successfully used as an intense straining process to obtain ultrafine-grained metals. However, the process is essentially discontinuous and the productivity is quite low for industrial purposes. The authors have proposed a novel continuous shear deformation p…
A La-deficient manganite perovskite sample La0.54Ca0.32MnO3−δ was prepared by conventional solid-state reaction method. The Curie temperature TC is 272 K, about 10 K higher than that of La1−xCaxMnO3. A large magnetic entropy change has been observed and the maximum −ΔSM≈2.9 J/kg K appears at its Curie temperature upon…
Magnetization of Ni/sub 52/Mn/sub 24.4/Ga/sub 23.6/ and Ni/sub 52/Mn/sub 24.2/Ga/sub 23.8/ magnetic shape memory alloys was measured as a function of magnetic field up to 50 kOe at temperatures in the range 160-390 K. Anomalies of magnetic properties were observed not only at the temperature of martensitic transition…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTHeterofunctional Linking Agents for the Synthesis of Well-Defined Block Copolymers of Dimethylsiloxane and tert-Butyl Methacrylate or 2-VinylpyridineVasilios Bellas, Hermis Iatrou, Emmanuel N. Pitsinos, and Nikos HadjichristidisView…
By means of thermal desorption experiments, the partition equilibrium (partition coefficient, K) was analysed for six food aroma components (d-limonene, n-decane, ethyl caproate, phenylethanol, n-hexanol and hexanal) between three sealable pollymer films suitable for direct food contact (ultra-low density polyethylene…
Thin AgCl layers photocatalytically oxidize water to O2 under appropriate conditions. The photoactivity of AgCl extends from the UV into the visible light region in a process known as self-sensitization, which is due to the formation of silver during the photoreaction. This silver can be almost quantitatively reoxidiz…