Materials Literature
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Abstract In the present work we have synthesized two‐component block‐ and graft copolymers MOPEO‐b‐PAAm, PAAm‐b‐PEO‐b‐PAAm and PVA‐g‐PAAm comprised methoxypoly(ethylene oxide), poly(ethylene oxide) or poly(vinyl alcohol) and chemically complementary polyacrylamide and also the grafted polymer‐inorganic hybrid SiO2‐g‐P…
The quantum systems of gold nanotubes of chiralities (4, 3) and (5, 3) have been studied in the framework of the Hubbard model for arbitrary values of the Coulomb interaction and electron concentration. The anticommutator Green’s functions of nanosystems, the energy spectra, and the ground state, ionization, and elect…
Benzo[a]pyrene (BaP) was dissolved in glyceryl trioctanoate, heated in a glass reaction vessel within temperature range 297.95–361.85 K with heating rate of 1 K/min and simultaneously exposed to UV light at wavelength λ = 365 nm at radiation power 20 mW cm−2 in order to study the decrease of BaP concentration due to i…
This work aims to study sintering of elemental titanium and pre-alloyed Ti-6Al-4V powders in a graphite furnace which is operated with back-filled argon. The specific task is to investigate the effect of carbon, oxygen and nitrogen contamination in the furnace atmosphere during sintering. X-ray diffraction (XRD) revea…
Ultrathin high-k dielectric ErAlO films were deposited on Si (100) substrates by using radio-frequency magnetron sputtering. The very flat surface of the annealed film with a rms roughness less than 0.25nm was observed by using an atomic force microscope. The film shows good thermal stability when annealing at 900°C f…
We report on the synthesis and characterization of Ge15Sb85 phase-change nanoparticles by magnetron plasma sputtering and inert-gas condensation inside an ultra-high vacuum compatible system. Electrical and optical properties of Sb-rich nanoparticles for phase-change memory applications have been examined. The results…
PURPOSE: To evaluate the effects of polishing on surface roughness (Ra, microm) and gloss of different shades of a surface pre-reacted glass-ionomer (S-PRG) filled flowable resin composite. METHODS: Resin disks of 15 mm diameter and 2 mm thickness and final polish with 3000-grit SiC paper (#3000), super fine cut diamo…
A possibility of solid-phase synthesis of new cerium double tellurites with s -elements from the oxides of cerium(IV), tellurium(IV) and magnesium (calcium, strontium) carbonates was demonstrated. It was determined by the X-ray diffraction method that the magnesium-cerium tellurite crystallizes in a cubic system, whil…
This paper reports on the drug release mechanisms of silicone structures with embedded steroids applied in pacing leads. Different derivatives of the steroid dexamethasone, which is associated with the reduction of acute stimulation thresholds, were evaluated together with different matrix based release control mechan…
In pyroprocessing it is important to determine the amount of Pu in the various streams of materials involved. This paper presents two approaches to determine the Pu mass of spent fuel assemblies using nondestructive assay and burnup simulation code. Cm balance is adopted and the concept of “Cm ratio,” the mass ratio o…
A structurally disordered Ho3+:LiGd(MoO4)2 crystal has been grown by the Czochralski method. The absorption and emission properties have been investigated in depth to predict its potential for lasing in the visible and infrared regions. The Judd–Ofelt theory has been applied to evaluate the important optical parameter…
The crystal-field and Zeeman splittings of the energy levels of Nd3+(4f3) 2S+1LJ in hexagonal phase AlN have been investigated. The multiplet manifolds of Nd3+(4f3) analyzed include the ground state, 4I9/2, and excited states 4I11/2, 4I13/2, 4F3/2, 4F5/2, 2H(2)9/2, 4F7/2, 4S3/2, 4G5/2, and 2G7/2. Experimental energy l…
Ordered mesoporous carbon (OMC) were prepared via template approach using phenolic resol as the carbon source, triblock copolymer as the organic precursor and tetraethyl orthosilicate (TEOS) as the template. The OMC with different pore structures were obtained by removing the silicon template with HF and KOH. Their ph…
The temperature dependences of ultrasound velocity a in Pb-Bi melts are measured by a pulsedphase method. The measurements were performed in the temperature range between the liquidus temperature and 1400 K, as a rule, in cooling of a sample. The experimentally measured temperature dependences of the ultrasound veloci…
The aim of the studies was to determine the oxidation kinetics of two magnesium alloys, i.e. WE43 and MSR-B, in CO2 atmosphere with and without the addition of 2 vol.% H2O. The rate of oxidation was measured by thermogravimetry in the temperature range of 530-580°C, i.e. below and above the eutectic melting point. The…
Open die powder compact forging was employed for consolidation of Ti-6Al-4V(wt.%) powders which were produced by a hydride-dehydride (HDH) process. The powders were initially warm-compacted into cylindrical shapes. Induction heating was used for preheating the compacts prior to forging into plates. The effect of the f…
Abstract This paper investigates low velocity impact involving a glass fiber‐reinforced polyamide engine oil pan as part of a complete new development of thermoplastic components. The assessment of the impact resistance has driven the need to employ LS DYNA for finite element modeling in order to benchmark and predict…
An error correcting capable 2/4 modulation code scheme is proposed in holographic data storage (HDS) systems. We adopt trellis coded modulation (TCM) to obtain a good error correcting capability without loss of data rate in the HDS systems. To overcome loss of a data rate caused by a 1/2-rate convolutional code, we ex…
Here, we report a facile method to synthesize a novel material-mesoporous carbon nanowires trapped in carbon nanotubes forming sword-sheath structures (MCW@CNT). They are fabricated by combining surfactant-templating self-assembly method and chemical vapor deposition in AAO template. Both of the sword and the sheath a…
An investigation of the chalcopyrite and rock-salt phase of the CdMgS2 compound was carried out in terms of FP-LAPW calculations. We found that the electron density of crystals contains important information required for studying the phase transition in this compound. By means of the atoms-in-molecules (AIM) and elect…