Materials Literature
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CoMoO 4 nanoscale materials were synthesized by a facile coprecipitation method and annealed at different temperatures with significant alteration of morphologies. The obtained CoMoO 4 materials were characterized by X-ray diffraction (XRD), FTIR spectroscopy, thermogravimetry and differential scanning calorimetry (TG…
The effect of the acceleration of carbon nanotube (CNT) growth from methane via modification of the gas composition with plasma discharge is studied by means of kinetic modeling. A model of CNT growth describing the detailed gas-phase and surface kinetics of hydrocarbons in catalytic chemical vapor deposition is used.…
Boersch, or stochastic space charge effect, is the effect of broadening of the e-beam axial energy spectrum. It limits resolution of fine electron optics by means of change in axial velocity of electrons. This is caused by a stochastic, discrete el ectron-electron interactions in an electron beam. We have computed bea…
The ferritic-martensitic steel 12Cr-MoWSiVNbB (EP-823) was irradiated with Ni ++ ions with the energy 7 MeV, and fluences of 2.7 × 10 20 and 3.9 × 10 20 ion/m 2 at 380 C. The irradiated samples were annealed at 600°C and then re-irradiated under the same conditions. After re-irradiation, the microhardness increased to…
Core/shell type nanoparticles, in which the shell consists of a thin layer of metal and the core consists of monodispersed dielectric nanoparticles, are of great interest owing to their characteristic plasmonic properties. In this study, we have fabricated highly regular two-dimensional arrays of silica-core/gold (or…
Abstract This article intends to draw attention to the problems and some solutions manufacturers face when using tool steels. Remarkable improvements have been made in the performance of this important steel group within the last decade. Enhanced material properties have been achieved by increasing cleanliness, homoge…
Bio-inspired silver nanoparticles were synthesized with the aid of a novel, non-toxic, eco-friendly biological material namely, pink guava waste extract (PGWE). The pink guava waste extract will act as the reducing agent in reduction process in order to reduce the aqueous salt solutions of the silver nitrate. Moreover…
Qualitative and quantitative texture changes are investigated in a severely deformed 5xxx series aluminum alloy. Unusual recrystallization textures are observed after a rolling strain of more than 97% in thickness reduction. The influence of both strain amplitude and strain mode on the development of the deformation a…
The basic principles of selecting some design parameters of a lightweight airplane for the contemporary Russian market are presented. Recommendations for selecting these parameters with the service requirements specified are given based on the study performed.
Emission distribution simulation on the cathode surface under ion bombardment shows greater ion bombardment damage on the cathode center than on the periphery. For example, for a klystron gun (5 × 10-8Torr CO), 46% emission decay occurred on the cathode center, although total emission decayed only 2%.
A novel electron trapping material of CaB4O7:Sm3+ was synthesized by high temperature solid-state reaction, and its characterization and luminescent properties were investigated at room temperature. The results indicate that ultraviolet light can be used as exciting source to store energy. After exposed under ultravio…
Abstract Die Positronen‐Emissions‐Tomographie (PET) hat nach mehr als 50 Jahren seit ihrer ersten Anwendung ihren festen Platz in der medizinischen Diagnostik gefunden. Möglich geworden ist dies durch die PET‐Tracer, die immer zahlreicher und ausgefeilter erforscht und entwickelt werden und durch die Beiträge der mode…
Abstract In order to make effective measure for the stress, strain and strain rate in the specimen, a tensile split Hopkinson bar (TSHB) was optimized in the first loading duration and the thermoviscoplastic models for a pure copper were determined. The deformation of the pure copper bar during the multi-tensile loadi…
A uniaxially oriented film of ferroelectric vinylidene fluoride (VDF) oligomer was fabricated by vacuum deposition on a friction-transferred vinylidene fluoride–trifluoroethylene copolymer; i.e., P(VDF/TrFE), film as a structural template. Fourier transform infrared spectroscopy and scanning electron microscopy measur…
To understand the electromigration degradation in Cu interconnects that utilize the TiO x self-formed barrier (SFB) probably due to Cu oxidation at the Cu/barrier interface, Cu films deposited on TiO x SFB and conventional Ta/TaN barriers were annealed in atmospheres of various oxygen concentrations. The Ta layer was…
CdS thin films with a different thickness have been prepared on glass substrates by using the thermal vacuum evaporation technique at substrate temperature of 150oC. The optical characteristics of the prepared thin films have been investigated by UV-VIS spectrophotometer in the wavelength range (300-1100 nm) . The fil…
A combination of unique properties of microelectrodes (ME) with a XYZ positioning system and simple potentiostat provides an outstanding tool for surfaceconfined electrochemical studies affording a method called scanning electrochemical microscopy (SECM). Since the first reports in the late 1980´s, SECM has transforme…
Abstract A spherical cavity expansion model for concrete is first proposed by using an elastic-brittle-plastic material law with Hoek–Brown strength criterion. The constitutive model can capture the basic features of the mechanical response of concrete materials including the effects of strain-softening and pressure h…
Engineering and redesign of enzymes are important to industrial biocatalysis. Fusion enzyme technology, based on fusion protein design, is frequently used in multifunctional enzyme construction and enzyme proximity control. Here, we reviewed the recent progress in molecular design strategy and application studies of f…
Bi2Te3-In2Se3 films were prepared by co-sputtering followed by annealing, and their structural and thermoelectric properties were investigated. The immiscible nature of the two alloys results in precipitation of the second phase, thus leading to structures with self-assembled dots that are a few nanometers in scale. H…