Materials Literature
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The special features of the ultrafine-grained structure forming in a Ti-6Al-4V alloy with the use of a method combining severe plastic deformation and reversible hydrogen treatment are studied by electron microscopy and X-ray diffraction analysis. Martensite and the α ↔ β phase transformations due to hydrogen presence…
The choice of appropriate interaction models is among the major disadvantages of conventional methods such as molecular dynamics and Monte Carlo simulations. On the other hand, the so-called reverse Monte Carlo (RMC) method, based on experimental data, can be applied without any interatomic and/or intermolecular inter…
In this paper, a novel method is proposed and employed to design a single diffractive optical element (DOE) for implementing spectrum-splitting and beam-concentration (SSBC) functions simultaneously. We develop an optimization algorithm, through which the SSBC DOE can be optimized within an arbitrary thickness range a…
A method has been developed to obtain semi synthetic surfactants, as a replacement for synthetic surfactants, by N-substitution reactions for the insoluble low molecular weight chitosan (LMWC) (about 13 kDa) with two different alkyl anhydrides (Acetic and butyric). The new derivatives are soluble in neutral, acidic an…
We investigated the effect of Zn doping on the electronic property of magnetite by using optical spectroscopy. The (Zn(x)Fe(1-x))Fe2O4 (ZFFO) (x = 0, 0.2, 0.4, and 0.5) samples were prepared by PLD technique. The XRD measurement revealed that all the samples have an inverse spinel-type of crystalline structure. The M-…
Phase transformation of calcite to vaterite in the presence of N-(2-hydroxy ethyl) ethylenediamine- N, N, N 1 - triacetic acid (HEDTA) is reported. The effect of HEDTA on the crystallization behavior and polymorphism of CaCO3 are studied at different temperatures (60 – 240 °C). The samples are characterized by powder…
We investigate electronic structure of the new iron chalcogenide high temperature superconductor K1−x Fe2−y Se2 (hole doped case with x = 0.24, y = 0.28) in the normal phase using the novel LDA’+DMFT computational approach. We show that this iron chalcogenide is more correlated in a sense of bandwidth renormalization…
Various glass samples were prepared in the system [(Pb x Sr1 − x )O · TiO2]-[2SiO2 · B2O3]-[K2O]-[BaO]-[Nb2O5] (0.5 ≤ x ≤ 1) by melt quench method. Donor dopant Nb2O5 has been found to play an important role in the crystallization of the parent glasses. X-ray diffraction studies indicated that perovskite lead titanate…
In this article, we report experimental studies on the effect of gold nanoparticle dispersion in a cholesteric liquid crystal matrix. Besides deeply affecting liquid crystal structural order upon inducing phase transition toward unexpected smectic-like phases, the presence of nanoparticles causes important changes in…
An X-ray diffraction study of ZnO crystals grown by the hydrothermal method has revealed reflections that give grounds to assign them to the sp. gr. P3 rather than to P63 mc. The distribution of Zn1, Zn2, O1, and O2 over structural positions, along with vacancies and incorporated zinc atoms, explains the dissymmetriza…
Silver nanoparticles (SNP) incorporated potassium oleate (KOL) soap by in situ reduction of silver nitrate by trisodium citrate (TSC) was described. Novel incorporation method of SNP into the natural rubber latex foam (NRLF) was successfully carried out by mixing 4 parts per hundred rubber (pphr) of SNP incorporated K…
As a result of our study, the temperature and temporal intervals of the appearance of sites of liquidphase sintering are determined and the qualitative variation of the TiNi phase in the sintered Ti-Ni reaction system is established. This is caused by the change in the nature of the TiNi phase upon going from the soli…
Abstract The glass–ceramic sealants developed at Forschungszentrum Juelich already meet several of the requirements for their potential use in SOFC stacks. The adequate choice of glass materials and adaptation of the joining and design parameters are essential for stack assembling. Successful long time operation of st…
The plasma reduction process for the production of reduced graphene oxide (rGO) requires precise process control in order to avoid the degradation of electrical characteristics. We report that the reduction status of the graphene oxides could be determined by monitoring the optical emission intensity at 844.6 nm. Prop…
ABSTRACT Natural rubber/multiwalled carbon nanotube (MWCNT) nanocomposites at loadings from 2 to 25 phr were prepared by ultrasonically aided extrusion at ultrasonic amplitudes up to 7.5 μm. Die pressure significantly decreased with an increase of ultrasonic amplitude, especially at higher loadings. Power consumption…
The electrochemical properties of layer-structured Hx(Ni1/3Co1/3Mn1/3)O2 were examined for the first time to evaluate its use as an electrode for an electrochemical capacitor in alkaline aqueous solutions. The protonated Hx(Ni1/3Co1/3Mn1/3)O2 (HNCM) was prepared by reacting Li(Ni1/3Co1/3Mn1/3)O2 (LNCM) with an HCl aqu…
Contamination at the surface of the insulator becomes a serious problem. Especially for the tropical area, humidity and rainfall play an important role in wetness by the water at the insulator surface, which result in the presence of contaminant and leakage current flowing at the surface. This leakage current will gen…
In this paper, the graphene layer is considered as the basic structural unit in a range of carbon materials. The effects of 2D and 3D order in defining the microstructures and macrostructures of carbons are reviewed along with the related concept of graphene layer orientation within the structure and the resulting rat…
Mesoporous carbons were synthesized using thermoplastic phenolic resin (PF) as carbonaceous precursor and magnesium citrate as template precursor. Pore structure was determined as ink-bottle-like geometry through TEM, N2 adsorption analysis combined with TG curves. The porous carbons prepared were then applied as elec…
The role of various structural features, namely basic scaffolds and substituents of small molecule inhibitors of the self-assembly of amyloid-beta (Aβ) peptide, a key process in Alzheimer’s disease, is described. The literature analysis in this update extends to the past 5 years, thus the past 15 year period is covere…