Materials Literature
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A simple and inexpensive approach based on the heat-treatment of Ag + /PVA/PVP composite film on quartz glass has been developed for fabricating large-area Ag nanorings attached small nanoparticles.
Rose Bengal photosensitized flow injection chemiluminescence method is reported using luminol-Cu(II) for the determination of vitamins A and C in pharmaceutical formulations. The reaction is based on the enhancement effect of analyte in the production of anion radicals of Rose Bengal (RB (•-)) which rapidly interact w…
Some glasses in the RE2O3–MoO3–B2O3 system (RE: Gd, Sm, Dy) were prepared by using a conventional melt quenching method, and the self-powdering phenomenon of β′-Gd2(MoO4)3 crystals, i.e., the breaking into small pieces during the crystal growth, was examined using polarized optical microscope observations in a heating…
As a classic dielectric material, BaTiO3 is one of the most important materials used in electronic applications. In this work, highly dense BaTiO3 ceramics with an average grain size of 35 nm were prepared, and dielectric and electrical properties were investigated. Microcrystalline BaTiO3 is an insulator at low tempe…
We propose the microstructural change model of magnesium hydride catalyzed by Nb2O5 during hydrogenation. The ball-milled composites, MgH2 and 1 mol% Nb2O5, were dehydrogenated and then rehydrogenated for varied time at room temperature under 0.1 MPa H2 atmosphere. The crystallite size of Mg and MgH2 was evaluated by…
A cylindrical hollow cathode discharge (HCD) in CH 4 /Ar gas mixture at pressure of 20-30 Pa was used to deposit diamond-like carbon (DLC) films on the inner surface of a stainless steel tube. The characteristics of the HCD including the voltage-current curves, the plasma images and the optical emission spectrum (OES)…
Scale up of chemical processes can introduce a variety of potential hazards including risk of thermal runaway and explosion. Many of these potential hazards are due to the deterioration in the ratio of surface area to volume that is suffered when manufacturing processes are operated at a larger scale than was used pre…
Nanocomposites exhibit high performance on antimicrobial activities and have the potential to be developed alternative antibiotics. In this study, antibacterial effects of chitosan silver nano composites (CAgNCs) were investigated using pathogenic Vibrio tapetis as a bacterial model. Agar disc diffusion and turbidimet…
A long period stacking ordered (LPSO) structure in Mg-based alloys is characterized by the periodical arrangement of stacking faults introduced to hcp matrix lattice. Alloying elements of rare earth atoms and transition metal atoms segregate to the stacking faults (SFs) and form chemically ordered structures in the la…
BiFeO3-based materials are currently one of the most studied multiferroics due to their possible applications at room temperature. However, among the large number of published papers there is much controversy. For example, possibility of synthesizing a pure BiFeO3 phase is still source of discussion in literature. Not…
A pure aluminum single crystal with a (213) [36\bar{4}] orientation was deformed by accumulative roll bonding (ARB) to an equivalent strain of 7.18 under lubricated conditions. The main orientation of the texture in the center layer was (4 4 11) [11 11 \bar{8}]. Two different kinds of crystal rotations were observed t…
Dilatometric tests for the eutectoid steel were performed and the results were used for identification of the phase transformation model for this steel. Physical simulations of controlled heat treatment of rail head were performed. Microstructure and properties after various thermal cycles were determined and these da…
Surface modification of natural reinforcements can enhance their adhesion to polymer matrices. This work reports the effects of varying NaOH concentration (5%, 10%, 15% and 20%) on the properties of the composites at 15wt% fiber loading and 50:50 okra/glass fiber ratio. The result indicated that treatment concentratio…
Melt fragmentation, quenching and long term coolability in a deep pool of water under reactor vessel is employed as a severe accident mitigation strategy in several designs of light water reactors. Geometrical configuration of the debris bed is one of the factors which define if the decay heat can be removed from the…
The thermoelectric properties, electronic band structure, density of states, chemical bonding, optical properties, electrons and holes effective mass of 1,3,6-trimetylo-alloxazine are calculated by using the full potential linear augmented plane wave method, based on the density function theory. Result shows that 1,3,…
Dissolution tests of Fe3O4 powders were performed in an acidic solution using a hydrazine base solution at a temperature range of 90-150 C. The dissolved fraction of Fe3O4 was calculated from the analysis of iron ion concentration in solution using an atomic absorption spectrometer. The dissolution rate of Fe3O4 incre…
Recentresearch has shown that machine strength grading based on tracheid effectscanning of fibre directions projected on board surfaces can provide moreaccurate strength predictions than today’s grading methods. Scanning techniquesin which 3D fibre orientations can be taken into account would most likelyimprove the st…
The -Fe 3[110] (112) symmetrical tilt grain boundary model is established by the coincidence site lattice theory. First-principles plane wave ultrasoft pseudopotential method based on the density functional theory is used to calculate the La occupying tendency in -Fe. The results show that La elements tend to be locat…
Ternary RE-Mg-Ni intermetallics are promising negative electrode materials for high-energy/high-power Nickel-Metal Hydride (Ni-MH) batteries. These compounds belong to a family of hybrid layered structures (AB 3 , A 2 B 7 and A 5 B 19 ; A = RE, Mg; B = Ni), composed of stacked Laves-type layers, RE 2-x Mg x Ni 4 , and…
In hot rolling, lubrication between the work roll and hot strip plays an important role in reducing rolling force and protecting the work roll surface. However, the tribological behavior in hot rolling has not been clarified sufficiently. In this work, the effects of oil amount on the coefficient of friction in hot ro…