Materials Literature
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The system of magnesium and magnesium iodide can reduce some aromatic aldehydes and ketones to the corresponding pinacols in good yields within 10–60 min at room temperature under ultrasound irradiation.
In-plane orientation and annealing behavior of Rutile TiO 2 films grown on MgO (100) substrates by means of inductively coupled plasma-assisted sputtering were investigated. We deposited TiO 2 films on relatively low temperature (≦400°C) MgO substrates in Ar–O 2 mixture gases. Several films were annealed in atmospheri…
The dynamic behavior of transient gratings (TGs) formed in a planar-aligned azo-dye-doped liquid crystal film is investigated. The temporal profile of the diffraction efficiency of TGs reveals two components corresponding to the fast photoinduced isomerization of azo dye molecules and the slow dye-induced reorientatio…
The dependence of ductile-brittle transition temperature (DBTT) on tempering time and temperature was examined for a martensitic steel F82H irradiated at 150 and 250°C to a neutron dose of 1.9 dpa in the JMTR. The heat treatment was performed at 750 and 780°C for 0.5 h after the normalizing at 1040°C for 0.5 h. The te…
Blends of polyaniline (PAni) and poly(methyl methacrylate) (PMMA) have been produced using core‐shell particle synthesis, which is advantageous because it allows changing surface‐related properties of PMMA with relatively small amounts of PAni and without the use of organic solvents. Scanning electron microscopy (SEM)…
N-(2,4-Dichloro)-salicylaldimine was synthesized, characterized by elemental analysis, FT-IR, and UV-visible spectroscopy, and its crystal structure was determined. The title compound is almost planar and contains short intramolecular O-H. . .N hydrogen bonds [O1-N1 2.601(1) A° ]. It remains transparent in the visible…
The amorphous polymer surfaces of polystyrene (PS, M n=200 kg/mol, M w/M n=1.05) and poly(methyl methacrylate) (PMMA, M n=51.9 kg/mol, M w/M n≤1.07) were brought into contact at 21°C to form PS‐PS (for 54 days) and PMMA‐PMMA auto‐adhesive joints (for 11 days). After contact at that temperature corresponding to T g‐bul…
The effect of heat treatments at 1100°C on an ion-beam synthesis of Si nanocrystals in SiO 2 layers is studied. The ion-implanted samples are subjected either to a single heat treatment after the total ion dose (10 17 cm −2 has been implanted, two heat treatments (a heat treatment after the ion implantation of each ha…
Abstract This work is aimed at improving our knowledge of the Nb and Fe precipitation in the low α-temperature range as a function of Fe and Sn contents in ZrNb based alloys. Several experimental variants, with Nb contents ranging from 0.3–0.8 wt%, Fe from 0.01–0.5 wt% (and also Sn additions), have been studied, with…
Mg-wrought alloys recently became an engineer material of constantly increasing interest. The mechanical properties of extruded Mg-feedstock of the alloys AZ80 and AZ31 indicate their suitability for automotive applications in form of high-quality forgings. Therefore a detailed knowledge about the forming behaviour is…
The photochromic performance of polymer-dye conjugates was successfully tailored using the living radical polymerization technique ATRP. ATRP allowed the synthesis of photochromic dye-polymer conjugates consisting of polymer of defined chain length and polydispersity with a single photochromic dye attached at one end.…
Molecular modelling has been successfully used to interpret the effect of two molecules on the crystal growth of barium sulfate. The replacement energy was found to correlate with the degree of inhibition as determined from conductivity experiments. It was also able to predict the preferred barium sulfate face for add…
Conducting poly(o‐ethoxyaniline) (PEOA)/OMMT nanocomposite was synthesized via a solvent intercalation method using organically modified montmorillonite (OMMT). The PEOA was synthesized from a chemical oxidation polymerization, a ring‐substituted polyaniline derivative with an ethoxy group that is soluble in chlorofor…
Abstract This paper describes a procedure for the on‐line computation of the harmonics of symmetrical components for voltages, currents and impedances in working induction machines. The algorithm used to compute these components is based on the discrete Fourier transform (DFT) of complex sequences. An experimental tes…
Highlights of recent U.S. fusion materials research activities are summarized, including multiscale materials modeling and experimental results. Recent first principles atomistic calculations on vanadium and iron-helium have found that previous interatomic potentials incorrectly predict several important point defect…
We extend the beam propagation method to calculate light propagation in reflective liquid crystal displays. The effect of diffraction on the optical performance of high-resolution liquid-crystal-on-silicon devices is investigated. The light efficiencies are simulated with respect to the pixel pitch for the vertically…
The utilization of surface engineered materials in various engineering fields has undergone a tremendous increase in recent years, and the need for proper surface engineering of materials has thus increased enormously. However, the knowledge acquired in conventional heat treatment processes, cannot be applied to surfa…
We report investigations of CdS-CdSe-CdS (core-well-shell) nanostructures by photoluminescence (PL) spectroscopy at temperatures between 77 and 300 K. PL intensity measurements show a transition from a pump-rate-limited regime at low excitation intensity to the range determined by a spontaneous emission lifetime at a…
We investigated the effects of water molecules in CsLiB 6 O 10 (CLBO) crystals on UV optical properties. Our results show that long-term heat treatment is necessary to adequately remove water molecules from inside the crystal. The reducing the number of water molecules contained in the crystal improves the transmittan…
Performance characteristics were summarized of two molten salt based fusion power plants. One of them is to burn spent fuel actinides, the other is to burn U238. Both power plants produce output energy larger than a fusion power plant would normally produce without including actinides. Additional features, obtainable…