Materials Literature
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Обоснована применимость модели сорбции и диффузии влаги, учитывающей диффузию по закону Фика, процессы структурной релаксации, химической реакции и влияние дефектной кромки, для диагностики состояния углепластика на начальной стадии старения. Показано, что после 6 мес старения в условиях умеренно теплого климата обнар…
The possibility of oriented growth of thin copper films with a (200) texture on a SiO 2 /Si substrate by magnetron sputtering in medium vacuum is demonstrated for the case when a predeposited nickel layer with a (200) texture serves as an orienting sublayer.
In this study, in order to explore a suitable method to obtain a better wear resistance and corrosion resistance of austenitic stainless steel, low temperature plasma carburizing technology has been studied. Research on the properties of austenitic stainless steel under different carburizing atmosphere proportion, wit…
The amphiphilic graft copolymer using chitosan and hydroxypropyl chitosan (HPCS) as hydrophilic backbone and poly(l-lactide) (PLLA) as the hydrophobic segment was prepared by a two-step method. Hydroxypropyl chitosan was prepared first by the reaction of chitosan and propylene oxide in isopropanol, then the HPCS graft…
Reactions of 1,3-dihydroxyadamantane with 1,3-dicarbonyl compounds in the presence of 5 mol % of In(OTf) 3 afforded a series of (1,3-adamantylene)bis-1,3-dicarbonyl compounds in yields of 25–83%.
Employing density functional theory and Grüneisen formalism, the layer dependence of zinc oxide (ZnO) sheet thermal expansion coefficients (TECs) is investigated. The monolayer ZnO sheet contracts significantly across the entire range of temperatures investigated. The negative TEC with maximum absolute value is determ…
The control of electromagnetic wave propagation is an important issue in either fundamental electromagnetic research or device application technologies. In this presentation we incorporate the active element into the metasurface concept to achieve dynamic control of electromagnetic wave reflection. We will present the…
Previously, a point kinetics model of the Medical Isotope Production Reactor has been presented, which included representations of instantaneous power, delayed neutron precursors, fuel solution temperature, radiolytic gas content, and coolant temperature. This model has been extended to include the effects of a vertic…
Oxide catalysts, which, in addition to Al 2 O 3 + SiO 2 , contain from one (Ni) to four oxides or compounds of transition metals (Ni, Cu, Mn, and Co) and oxides or compounds of rare-earth elements (Ce, La), are produced on D16 aluminum alloy by plasma electrolytic oxidation combined with impregnation and subsequent an…
Fe–B–P submicrometre particles were synthesised by a novel chemical method. The size of the Fe–B–P particles (0·1–1 μm) is easily controlled by tuning the NaBH4 concentration and its dropping speed. The saturation magnetisation (Ms) of Fe–B–P submicrometre particles is >130 emu g−1, whereas the coercivity is <10 Oe. T…
Isomorphic nambulite, natronambulite, marsturite, and lithiomarsturite belong to the p-p (pectolitepyroxene) series of pyroxenoid group minerals with five-periodic single chains of tetrahedra and the common simplified composition (Li,Na)(Mn,Ca) 4 [Si 5 O 14 (OH)] (Z = 2, space group P1̄). New crystal structure refinem…
The structural evolution during the oxidation process of graphite by a modified Hummers method is investigated. The graphite oxide (GO) composition, disorder parameter, and structures are confirmed by means of x-ray diffraction, Fourier transform infrared spectroscopy, Raman, and scanning electron microscope technique…
Chemically crosslinked elastomer poly(xylitol sebacate)(PXS) is for the first time electrospun into fibrous mats. The PXS2:5 fibre mats show nonlinear J-shaped stress-strain curves, with large average rupture elongation (≈75%). The newly developed porous PXS scaffolds show tissue-like mechanical properties and excelle…
Physico-chemical and structural properties of nanocomposite NiO/ZrO 2 :Y 2 O 3 (NiO/YSZ) films applied using the reactive magnetron deposition technique are studied for application as anodes of solid oxide fuel cells. The effect of oxygen consumption and magnetron power on the discharge parameters is determined to fin…
In this work, we report on the synthesis of MgMoO4 crystals by oxide mixed method. The powder was calcined at 1100 °C for 4h and analyzed by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Field emission gun scanning electron microscopy (FEG-SEM), Ultraviolet-visible (UV-vis) absorption spectroscopy and P…
Silkworm silk is among the most widely used natural fibres for textile and biomedical applications owing to its extraordinary mechanical properties and superior biocompatibility. In this paper, we reported a direct procedure in producing intrinsically luminescent silk by feeding silkworms with Rhodamine B (RhB). We de…
We investigated deposition modulation by noble metals on a photochromic diarylethene (DAE) film. Differences in color and sheet resistance ( R s ) between the metal films deposited on the colored and colorless DAE films were observed. We observed R s ratios of 10 6 for Ag, 10 7 for Cu, and 10 4 for Au. We found that t…
Microwave properties of ferrite-ferroelectric magnonic crystals are investigated for the first time. The electric and magnetic rearrangement of the band gaps in the spectrum of proper electromagnetic spin waves in such structures is demonstrated.
Differential capacitance is derived based upon energy, charge or current considerations, and determined when it may go negative or positive. These alternative views of differential capacitances are analyzed, and the relationships between them are shown. Because of recent interest in obtaining negative capacitance for…
SEU, SEL and SET sensitivity estimation results using laser technique in dependency of TID effects are presented and discussed.