Materials Literature
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Uniformity of the phase structure in binary and ternary polystyrene, polyamide and polyethylene blends was studied. It was found that areas containing particles with strongly different average size coexisted in quenched and compression molded samples of all blends under study. It was shown that neglecting of this effe…
Abstract Na 2 MnO 2 was prepared via the azide/nitrate route. Stoichiometric mixtures of the precursors (Mn 2 O 3 , NaN 3 and NaNO 3 ) were heated in an appropriate regime up to 390 °C and annealed at this temperature for 20 h, in specially designed silver containers. As the most prominent feature, the crystal structu…
ZnO films were deposited on c-plane sapphire substrates in Ar atmosphere by rf magnetron sputtering and were post-annealed at 400 degrees C in green gas (95% N2 + 5% H2). The properties of the as-grown and annealed films have been characterized by X-ray diffraction (XRD), Rutherford backscattering (RBS), elastic recoi…
In this work multiobjective shape optimization of a 19-pin wire-wrapped fuel assembly is carried out using a hybrid multiobjective evolutionary approach in order to achieve an acceptable compromise between two competing objectives, i.e., enhancement of heat transfer and reduction of friction loss. Two nondimensional v…
Oxygen plasma immersion ion implantation (PIII) has been conducted on AZ31B magnesium alloy using different bias voltages. The modified layer is mainly composed of MgO and some MgAl 2 O 4 . Results form Rutherford backscattering spectrometry (RBS) and X-ray photoelectron spectroscopy (XPS) indicate that the bias volta…
Concentrations of radionuclides in liquid and solid technological waste of the South-Ukrainian Nuclear Power Plant were studied. It is shown that correlated variation in radionuclide content of all samples is observed. Simple relations are derived for evaluating concentrations of radionuclides from the data on the 60…
Thermoelectric bismuth telluride nanowire arrays have been synthesized by direct-current electrode-position into porous anodic alumina membranes both galvanostatically and potentiostatically. The as-synthesized Bi2Te3 nanowire arrays are highly ordered in large area, stoichiometric, uniform, with high aspect ratio (ab…
We report on the light induced spin transition in the tetranuclear spin crossover complex [Fe 4 (CN) 4 (bpy) 4 (tpa) 2 ](PF 6 ) 4 . The photo-conversion occurs at the specific site (Fe2) of four Fe II ions. The red light irradiation (1.79 eV) gives rise to full conversion of Fe2 into the high spin state from the low s…
Abstract The C15 Laves phase with composition Tb 0.2 Pr 0.8 (Fe 0.4 Co 0.6 ) 1.93 was synthesized by mechanical alloying (MA) and subsequent annealing process. The structure and magnetic properties of Tb 0.2 Pr 0.8 (Fe 0.4 Co 0.6 ) 1.93 were investigated by means of X‐ray diffraction (XRD), a vibrating sample magnetom…
Abstract:- In this paper we explore complex relationships between mechanical and sensory properties of fabrics, and the perceived tactile comfort. Mechanical properties, measured objectively by Kawabata Evaluation System for Fabrics (KES-FB), and handfeel properties, measured subjectively by sensory expert panel, are…
Analytical and experimental investigation into dynamic properties of glued–laminated (glulam) beams reinforced with various lay ups of e-glass reinforced epoxy polymer (GRP) composites are discussed. Three unreinforced glulam (control) beams and 11 glulam beams reinforced with GRP on their bottom surface were clamped…
Abstract 9,9′-Bianthryl formed an inclusion compound with chlorocycloheptane in a 2:1 ratio. X-ray analysis revealed that two guest molecules were accommodated in a cavity surrounded by eight host molecules. The guest molecules were conformationally fixed in each cavity into either of two twist-chair forms that differ…
Lanthanum-doped lead zirconate titanate, PLZT-x/65/35 (x=8.0, 9.0, and 9.4), relaxor ferroelectric ceramics were investigated by the high resolution Brillouin light scattering spectroscopy in the temperature range from ∼870 down to ∼170 K. Broad anomalies were observed in the acoustic phonon mode velocity and related…
We study scattering between electrons and optical phonons in a graphene sheet. Electron-phonon interaction is derived for zone-center and zone-boundary phonons within the framework of the effective-mass equations. We calculate the electron lifetime due to phonon emission and absorption. The inter-valley scattering ind…
We investigate the electrooptical properties of polymer-stabilized vertically aligned (PSVA) pi cells. Curing a cell with a curing voltage causes the polymerized cell to have a low threshold voltage and a fast field-on response time, because the curing voltage gives the polymerized cell in-cell polymer structures, inh…
The temperature characteristics of the electric current and the photocurrent in films of composites based on electrically neutral poly(vinyl butyral) with additions of Cu(II)/Cr(III) heterometallic cation-anion complexes are investigated. The electrical conductivity and photoconductivity of the polymer composite films…
This note presents an optimized substrate-free focal plane array (FPA), which is implemented in an optical readout uncooled infrared (IR) detector. The supporting frame of such FPA is a temperature-variable one due to the large decreases in both the heat capacity and the thermal conductance. This brings a unique therm…
Polyurethane (PUR) crosslinked copolymers composed of 4,4'-diphenylmethane diisocyanate (MDI), poly(ethylene adipate)diol (PEA), glycerine (Gly), and diol [1,2-ethanediol (ED), diethylene glycol (DEG), 1,3-propanediol (PD), 1,4-butanediol (BD), 1,5-pentanediol (PTD) or 1,6-hexanediol (HD)] as a chain extender were syn…
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Both ZrC and SiC layers are crucial layers in TRISO coated fuel particles since they prevent diffusion of fission products and provide mechanical strength for the fuel particle. However, each layer has its own defects, so the purpose of this study is to determine such defects in these layers. In this study, we carried…