Materials Literature
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The penetrability of concrete in relation to a projectile and the resistance of reinforced concrete against explosion are of considerable interest. The reinforcing steel bars make modeling reinforced concrete more complex than that of plain concrete. In this article, the authors propose a simple but more effective way…
Galvanised steel sheets have been joined using an arc brazing processing technique with Cu97Si3 as the filler metal. Gas metal arc (GMA) brazing and gas tungsten arc (GTA) brazing tests were conducted in flowing argon and with varying process parameters. Excellent wetting between base material and filler was observed…
A series of dendritic gadolinium complexes based on dendrimers with 1,4,7,10-tetraazacyclododecane as the core were synthesized. Both diethylenetriaminepentaacetic acid and pyridoxamine were incorporated to the amine groups on the surface to give the dendritic ligands. These dendritic ligands were then reacted with ga…
The influence of H+ and D+ ion irradiation and laser illumination on the optical absorption edge, the refractive index and the Raman scattering spectra of as-deposited and annealed As2S3 films have been investigated. It was established, that a significant similarity exists between optical changes induced in As2S3 film…
An overview of thermochemical treatment technologies (TTTs) for radioactive and toxic wastes is given. TTTs have been developed for pretreatment (e.g. decontamination), treatment and conditioning of specific wastes such as mixed, organic or chlorine-containing radioactive waste and contaminated soils. TTTs use powder…
A swing objective retarding immersion lens (SORIL) column for wafer inspection is designed and constructed based on SOIL concept. The column consists of a compound retarding electrostatic and magnetic immersion lens and five electrostatic deflectors. The retarding electrostatic and magnetic immersion lens has small sp…
The microstructural evolution of AZ61 magnesium alloy during hot compression at various temperatures was investigated. The experimental results show that dynamic recrystallisation occurs over a wide temperature range. Grains can be greatly refined through dynamic recrystallisation. The mean size of the recrystallised…
Using small-angle neutron scattering (SANS) results, pressure−volume−temperature ( PVT ) data from both polymer melts and blends, and experimentally determined critical temperatures, we employ the lattice Born−Green−Yvon (BGY) theory in the development of new routes for the characterization of polymer fluids and polym…
New approach to the synthesis of unsaturated polyester/clay nanocomposites is described. Various forms of organically modified montmorillonite (OMMT) were introduced in situ during the copolyaddition of epichlorohydrin, maleic anhydride and phthalic anhydride. The catalytic effect of OMMT containing quaternary ammoniu…
The spin injection dynamics of GaMnN∕InGaN multiquantum well (MQW) light emitting diodes (LEDs) grown by molecular beam epitaxy were examined using picosecond-transient and circularly polarized photoluminescence (PL) measurements. Even with the presence of a room temperature ferromagnetic GaMnN spin injector, the LEDs…
The Cu/ZnO/Al 2 O 3 catalyst prepared by the co‐precipitation method is employed in industrial large‐scale methanol synthesis. Although intensive research has already been carried out on this catalyst system, several attempts are still being made to improve it. The knowledge‐based approach provides the basis for a rat…
Principles of physical chemistry and physical properties are used to describe foam formation. Foams are common in nature and in consumer products. The process of foam formation can be used to understand a wide variety of phenomena from exploding volcanoes to popping popcorn and making shoe soles.
A theoretical model is proposed to describe the emission of partial dislocations by grain boundaries in nanocrystalline materials during plastic deformation. Partial dislocations are assumed to be emitted during the motion of grain-boundary disclinations, which are carriers of rotational plastic deformation. The range…
In the controlled release area, biodegradable microcapsules are one of the most useful devices to deliver materials in an effective, prolonged and safe manner. A new charged film microcapsular carrier system, using three different pectins, is described. The study utilized pectin microcapsules prepared by two encapsula…
This paper is concerned with the corrosion resistance and biocompatibility of titanium after surface modification by the ion implantation of calcium or phosphorus or calcium + phosphorus. Calcium and phosphorus ions were implanted in a dose of 10(17) ions/cm(2). The ion beam energy was 25 keV. The microstructure of th…
In this paper we show that electron back-scattered diffraction (EBSD) is an effective technique for identifying polytypes of micas in a scanning electron microscope (SEM). Platy crystals mounted on a specimen holder are instantly analyzed and the polytypes are determined by comparing observed and calculated Kikuchi pa…
The average crystal structures of two natural porous titanosilicates of the labuntsovite group, lemmleinite-Ba and lemmleinite-K, ideally Na 4 K 4 Ba 2 Ti 8 (Si 4 O 12 ) 4 O 4 (OH) 4 ⋅8H 2 O and Na 4 K 4 K 2 Ti 8 (Si 4 O 12 ) 4 O 2 (OH) 6 ⋅8H 2 O, respectively, have been refined from single crystal X-ray diffraction d…
The microhardness–nanostructure correlation of a series of silica/silicon oxycarbide porous composites has been investigated, as a function of pyrolysis temperature, T p . The pyrolyzed products have been studied by means of scanning electron microscopy, mercury porosimetry, chemical analysis, solid‐state 29 Si‐NMR, X…
With the aim of clarifying the complex shapes of the stress-strain curves of yams such as wool and silk and improving the reproducibility of the experimental results achieved through their mechanical characterization, nylon 6,6 yams consisting of one, three, nine, and thirty filaments are selected as a modeling system…
Summary The complexation of salicylate with Eu 3+ was studied by means of time-resolved laser-induced fluorescence spectroscopy (TRLFS) using ultra-short pulses at a concentration of sodium salicylate of 1.00×10 -4 M. Ionic media was kept constant at 0.1M NaClO 4 . pH was adjusted to 4.00. The concentration of Eu 3+ w…