Materials Literature
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The role of point defect production during deformation was examined by sealing the vacancy sinks in the grain boundaries with solutes to magnify its effect upon instantaneous strain-rate changes. AA1100 aluminium sheets were thermal-mechanically treated to result in a grain size of about 25 µm and in grain boundaries…
The alpha (α)-particle and neutron emission spectra in a deuterium-tritium plasma accompanied with neutral-beam-injection (NBI) heating are evaluated in a consistent way by solving the Boltzmann–Fokker–Planck equations for deuteron, triton, and α-particle simultaneously. It is shown that owing to the existence of non-…
Stable azimuthal alignment states have been created in the plane of a homogeneous layer of nematic liquid crystal by the action of one or more sawtooth sidewalls. The alignment states in devices with two sawtooth sidewall structures, either in-phase or in antiphase, and with one sawtooth wall opposite a flat wall have…
SYNOPSIS A model of a new-type thermoelectric heat pump driven by a thermoelectric generator is built and the performance of the device is analysed and optimised based on non-equilibrium thermodynamics. The analytical formulae concerning heating load, non-dimensional heating load and coefficient of performance (COP) o…
Abstract To our knowledge, the incorporation of nanodiamond (nD) as a reducing agent in an energetic composition has never been reported in the literature. Diamond exhibits particularly interesting physico‐chemical properties: high density, good energetic potential, and relatively low thermal sensitivity. This study p…
Phthalocyanines, porphyrins and analogs are highly versatile and stable molecules with an extended π-aromatic system and high extinction coefficients, making them suitable for integration in solar cells as photoactive components and/or as light-harvesting materials. The most significant results by Spanish groups in th…
Triglycine sulfate (TGS) crystal is an important ferroelectric crystal used on a large spectrum of radiation detection. Crystals from this family are used as targeted vidicon materials. Pure, (L + D) and L- or D-alanine doped TGS crystals in the ferro- and paraelectric phase, 3-4 cm long, were grown by slow solvent ev…
In this paper, the corrosion prevention capability and mechanical behavior of a cracked reinforced concrete beam repaired by the electrochemical deposition method were investigated. To evaluate the effects of repair, the crack closure percentage, the water permeability, the corrosion rate of the reinforcing steels and…
Specimens of SAF2507 super-duplex stainless steel were heated at 920°C with different aging time. The phase transformation and development of microstructure in the materials were investigated by color optical microscopy, scan electron microscopy, energy-dispersive spectroscopy and X-ray diffraction. The hardness was t…
Vanadium Dioxide and Vanadium Sesquioxide Thin Films Fabricated on (0001) or (1010)Al2O3 by Reactive RF-Magnetron Sputter Deposition and Subsequent Annealing Processes, Yun, Sun Jin, Lim, Jung Wook, Noh, Jong-Su, Kim, Bong-Jun, Kim, Hyun-Tak
Carbon nanotubes and nanofibres (CNTs-CNFs) films have been grown on Ni sheets by low pressure chemical vapor deposition system and show good physical adsorption capability for ferric (Fe(3 + )) ions. The studies of adsorption kinetics and isotherms indicate that Fe(3 + ) adsorption process was regarded as first-order…
This review addresses the description of fundamental principles underlying the development of liquid crystalline phases in hydrogen-bonded complexes. Low-molecular-mass models and polymers systems are considered, where hydrogen bonding is used as an efficient means for modifying polymer structure and designing new mat…
Carbon nanomaterials with graphene structure (single- and multiwall nanotubes and nanofibers) after oxidizing by a mixture of sulfuric and nitric acids and presumable introducing of carboxyl groups can be used as carrying agents of hydrogenation catalysts. Platinum in a concentration which should not exceed 10 wt % ca…
The multi-instability of the electronic structure of (EDO-TTF)2PF6, where EDO-TTF means ethylene-dioxytetrathiafulvalene, is reviewed. This complex showed the metal–insulator transition at 280 K associated with distinct molecular deformations. The mechanism is interpreted as the cooperation of Peierls transition, char…
Phase relations in the Y 2 O 3 -Ga 2 O 3 system were studied by the anneal-and-quench technique in air within 1000–2300°C, and a phase diagram was plotted. Three compounds were found to form: Y 3 GaO 6 , Y 4 Ga 2 O 9 , and Y 3 Ga 5 O 12 ; the temperature and concentration bounds of stability were determined for these…
At high frequency, displacement current in dielectric layers of multilayer magnetic thin films becomes significant, and eddy-current loss can be much worse than would be predicted without considering displacement current. Two-dimensional finite-element method simulations were used to study the behavior of eddy-current…
The highest value of saturation magnetization (80 emu/g) ever reported has been achieved in Ni0.65Zn0.35Fe2O4 at lower sintering temperatures through sol-gel synthesis. The observed highest value of saturation magnetization has been explained on the basis of core-surface magnetic interactions facilitated through low t…
Abstract The influence of Mn solute atoms on sub-grain boundary mobilities in Al has been determined by accurate electron backscatter diffraction analysis of the sub-grain sizes and misorientations during recovery annealing. High purity Al-0.1 and 0.3 wt.% Mn alloys were deformed by plane strain compression at room te…
The optical spectral band positions and EPR g-factors (g‖ , g ⊥) for the tetragonal Ce3+ centers in YPO4 and LuPO4 crystals with the zircon-structure are calculated using a complete diagonalization (of the energy matrix) method (CDM) related to 4f1 ions in tetragonal symmetry. In this method, the Zeeman interaction te…
Nanotechnology is the latest platform technology to capture the imagination of the agricultural and food industries, with applications being adopted across these entire sectors. With companies such as Kraft Foods and H. J. Heinz investing heavily in nanotechnology research and development, industry commentators have s…