Materials Literature
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The magnetization reversal process in the surface and volume areas of Co-rich glass-covered microwires has been investigated. The study has been performed in the wide series of microwires with chemical composition, geometry (thickness of glass coating) with the purpose of the tailoring of the giant magnetoimpedance ef…
We have used high energy x-ray diffraction microscopy (HEDM) to study annealing behavior in high purity aluminum. In-situ measurements were carried out at Sector 1 of the Advanced Photon Source. The microstructure in a small sub-volume of a 1 mm diameter wire was mapped in the as-received state and after two different…
The various dielectric relaxation processes in NCO-terminated liquid crystalline polyurethane (LCPU) samples have been investigated using the thermally stimulated depolarization current (TSDC) technique. The TSDC results obtained for LCPU samples polarized under different poling conditions show the presence of three p…
The rates of energy deposition of MeV electrons by return-current Ohmic heating and Coulomb collisions are compared in the context of the fast ignition scheme of inertial confinement fusion. A criterion for distinguishing the relative importance of the two heating mechanisms is presented. It depends on the kinetic ene…
A new incommensurate magnetic structure with a locally triangular orientation of spins has been proposed for a two-subsystem magnet with frustrated intersystem exchange and competition between exchanges in one of the subsystems. When the temperature is lowered, this structure appears from the antiferromagnetic state a…
In this article, we report the improvement of energy conversion efficiency by a simple process for dye-sensitized solar cells (DSSCs). Some previous studies were reported in which TiO2nanowires were used in the place of TiO2nanoparticles as a TiO2electrode because nanowires possess a good electron transport property.…
Micro- and nanopowders of aluminum oxide with nanoparticles ranging from 200 μm to 40 nm obtained by the sol-gel technique have been investigated and the influence of their dimensions on phase transitions γ-Al 2 O 3 → α-Al 2 O 3 have been studied using differential thermal analysis, X-ray diffraction, and scanning ele…
Surface modification of Poly(ρ-phenylene terephthalamide) (PPTA) fiber has been considered an effcient way to increase the interfical bonding of the fiber/epoxy composites. In this article, the hydrogen peroxide solutions (H2O2) was used to treat the PPTA fiber based on an orthogonal experimental design. The optimum c…
The accumulation factors determine deviations from the exponential law of the actual dependence of monochromatic plane-parallel gamma-ray beam attenuation during passage through a material layer. For a number of media and shielding materials, accumulation factors are well known and tabulated. The solution of the probl…
Structure of X5CrNi18-10 and S355NL Steels after Remelting with the Electric Arc The work presents the results of the research and tests of the surface machining of the S355NL and X5CrNi18-10 steels with the concentraded stream of heat with the usage of the GTAW method. The surface layers of the tested steels were rem…
Abstract Hyperbranched azo-polymer-grafted graphene oxide (GO) hybrid was synthesized. Epoxy-based precursor polymer was first covalently attached to GO through an ester linkage. Then the hyperbranched azo-polymer-grafted graphene oxide hybrid can be obtained by azo-coupling reaction between the epoxy-based precursor-…
Abstract Faradaic current measurements have been carried out on three different types of mullite: 2:1 mullite single crystals (E ⊥ c), 3:2 ceramics and 11% mullite/Mo composites. Measurements were carried out on very thin samples (60 μm) at high voltages (500 to 1000 V). Under these conditions, measurable currents wer…
A novel wet cleaning formulation approach was developed with a TiN etch rate of more than 30 Å/min at room temperature and more than 100 Å/min at 50°C. The chemicals are compatible with Cu and low-k materials, and are suitable for Cu dual damascene interconnect 28 nm and smaller technology node applications. The chemi…
In order to increase the electrode surface area and enhance the charge storage capacity, we study the micro electro mechanical system technology to fabricate three-dimensional high aspect ratio micro-electrode structure based on glass. The anodic constant potential method is employed to deposit manganese oxide as elec…
In this paper, the emission mechanism and new key technologies for manufacturing M-type cathodes with high performances are introduced.
Data on the synthesis and the IR spectroscopic and X-ray diffraction analyses of new complexes of yttrium chloride with carbamide (Ur), [Y(Ur) 4 (H 2 O) 4 ]Cl 3 ( I ) and [Y(Ur) 6 (H 2 O) 2 ]Cl 3 ( II ), and with acetamide (AA), [Y(AA) 5 (H 2 O) 2 ]Cl 3 ( III ), are presented. The coordination of the ligands occurs th…
Regarding the inherent limitations of previous thermodynamic description on nucleation, the nucleation work has been re-analyzed for undercooled melts by introducing temperature- and position-dependent thermodynamic quantities in the diffusive interface. At the small undercoolings, the obtained critical nucleation wor…
In this work, we investigate the structural properties of Ge quantum dot lattices in amorphous silica matrix, prepared by low-temperature magnetron sputtering deposition of (Ge+SiO2)/SiO2 multilayers. The dependence of quantum dot shape, size, separation, and arrangement type on the Ge-rich (Ge + SiO2) layer thickness…
Rare materials collected by individuals, in the past and in our own time, when given to research libraries become important public assets that, as cultural heritage collections, lend distinction to the institutions that receive them and benefit education and scholarship enormously. What motivates collectors to become…
This paper presents some research results of the application of finite element method and molecular dynamics in the simulation of grinding surface creation. The comparison of these two methods shows that both methods could illustrate the material removal phenomena and provide useful information of grinding mechanics,…