Materials Literature
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A theoretical analysis based on the calculation on atomic displacement vectors during twinning was performed to investigate twinning mechanism for magnesium and its alloys. After that, a new mode on the atomic motion during twinning was proposed for magnesium and its alloys. During twinning, it was suggested that atom…
A reduced beam section with a bolted web connection (RBS-B) is permitted for use only in Intermediate Moment Frames (IMF). In order to investigate whether IMFs with RBS-B connections provide a satisfactory seismic performance, this study evaluates the seismic performance of 3-, 6-9-and 20-story IMFs with pre-qualified…
The cooling rate with which the liquid is cooled has tremendous impact on the macroscopic properties of amorphous solids, but little information on the underlying mechanism for this dependence is available, mainly due to the lack of clear characterization on the microstructural variation induced by cooling rate. We bu…
The experimental results show the sharply strengthened effects of acoustic emission from a breakdown zone by the joint influence of laser and ultrasonic irradiation. Various breakdown thresholds and character of acoustic emission in fresh and sea water are observed. The experimental result established that acoustic em…
This research demonstrates a newly developed technique to fabricate multilevel interconnections with differential adhesion strengths between metal and silicon-oxide (SiO2) thin films. In the field of micro electromechanical systems (MEMS), the various kinds of metals have been applied as functional materials, i.e. low…
We have measured the electronic transport and magnetic properties of the rare-earth doped iron-cuprate FeSr2Y2-xCexCu2O10−δ with x = 0.3 and compared the results with previous measurements on a less hole doped sample with x = 0.7. We find that there is a spin-glass and the spin-glass temperature (~23 K) has not change…
Исследованы фазовый и элементный составы и магнитные свойства (B ≤ 7,5 Тл, 2,0 К ≤ T ≤ 70 К) \n сплавов Pb₁₋yFeyTe при вариации концентрации примеси вдоль монокристаллического слитка, синтезированного методом Бриджмена. Определены распределение примеси железа по длине слитка в основной \n фазе и составы микроскопическ…
A number of X-ray analyses of an enzyme involved in a key early stage of tetrapyrrole biosynthesis are reported. Two structures of human 5-aminolaevulinate dehydratase (ALAD), native and recombinant, have been determined at 2.8 Å resolution, showing that the enzyme adopts an octameric quaternary structure in accord wi…
The response of dry and water saturated sand slugs impacting normally oriented and inclined rigid-stationary targets with four different surface coatings is measured with an emphasis on the quantification of the momentum transmitted from the slugs into the targets. The targets were coated with Alumina, PTFE, Aluminium…
The morphology of films, superlattices, and other structures of colloidal nanocrystals has been investigated by atomic force microscopy (AFM). The capabilities of ultrasharp and conventional probes for AFM are compared. The problems of detection of nanocrystal close packing are discussed.
Detection methods for re-emitted positrons from Ni samples were investigated for in-situ positron annihilation lifetime spectroscopy during ion beam irradiation. A conventional mesh electrode and a ring electrode were examined to detect re-emitted positrons. Results of positron trajectory calculation were in good agre…
In the present study spray forming of alumina tube with a wall thickness of 0.4–0.6 mm and the diameter of 38–62 mm on graphite substrate with two different sizes of alumina feedstock powders was used for flame spraying to form matrix of Al2O3 structures which have been fabricated. A detailed characterization of the s…
The dynamic relations on the phase interface are derived in the isothermal approximation for liquids in which the dependence of the surface energy on the mass flux across the phase interface must be taken into account. The criterion of stability of subsonic phase-transition fronts with plane waves with respect to smal…
This work studies the surface characteristics, the antimicrobial activity and the aging effect, of plasma pre-treated polyamide 6,6 fabrics (PA66) coated with silver nanoparticles (AgNPs), with the aim to identify the optimum size of nanosilver exhibiting antibacterial properties suitable for manufacturing of hospital…
In order to research the mechanical properties of concrete under impact load, a splitting tensile test of concrete cubes was carried out under the impact load by using the drop test machine. A high-speed camera was used in test to record the crack development process of each specimen. According to box dimension algori…
We perform first-principles calculations on the momentum densities in Fe. The ridge and valley appear on the ∑ and Δ lines, respectively, on the (001) plane. This anisotropic distribution of the momentum densities is found to originate from the difference between symmetries of the ∑( C 2 v ) and Δ( C 4 v ) lines. The…
The present research is dealing with the comparative study of inelastic/elastic behavior of reference ∼12%Cr steel ZL3 and three new trial steels ZU1, ZU2, ZU3, with different ratio of alloying elements and equal content of Cr, using internal friction measurements. The samples were examined in “as-received” condition…
This paper shows the possibility of using the plasmodynamic method for synthesizing ultrafine powders of the Ti–C–N system using different techniques for introducing a precursor. The synthesized powder is analyzed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Raman spectrosc…
Elastomers are necessary materials in building materials. Mouldy materials will not only influence the surface view but also mechanical properties. In this paper, maleoyl chitosan (MCS) was selected as antimicrobial for improving natural rubber (NR) materials' antimicrobial properties together with mechanical and agei…
Hydrogels have attracted much attention for their biocompatibility and tunable properties for use in tissue engineering and regenerative medicine. Cellular adhesion and organization can be controlled by the microstructure of the scaffold. Here, we describe a new cellulose-based bundled hydrogel fiber fabricated by a d…