Materials Literature
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The (35)Cl nuclear quadrupole resonance (NQR) frequencies (nu(Q)) in caesium and sodium chlorates were measured as a function of temperature, from 77 to 300 K at different pressures up to 5.1 kbar, and the data were analysed to estimate the volume dependence of the electric field gradient (EFG), torsional frequency an…
Aluminium-chromium based alloys are promising candidates for manufacture of light components exposed to elevated temperatures. The work describes properties of Al-6.0wt.%Cr- 2.1wt.%Fe-0.5wt.%Ti alloy. The rapidly solidified powder was prepared by the pressure nitrogen melt atomization. The powder was then subject to h…
Ti ion and C ion is implanted into AZ31 magnesium alloy surface by metal vapor vacuum arc (MEVVA) implanter operating with a modified cathode. This metal arc ion source has a broad beam and high current capabilities. Implantation energy is fixed at 45K eV and dose is 9×1017 cm-2 and 3×1017 cm-2 respectively. Through i…
Under SOFCs operating condition, the cathode reaction rate is determined by triple phase boundary (TPB) areas which are associated with the geometry of the interface between the cathode and the electrolyte. In this paper, YSZ electrolyte was deposited by atmospheric plasma spraying (APS). A nano-scaled lanthanum stron…
In order to improve corrosion resistance of galvanized steel, a novel cerium-phytic acid passivation treatment was studied. The process of cerium-phytic acid passivation on galvanized steel was optimized. The corrosion resistance of cerium-phytic passivated samples was tested by dropping test and weight loss test. The…
The YCo 4 B exhibits peculiar behavior of the magnetization curves related to the occurrence of a spin reorientation phenomenon at low temperature and of a first-order magnetization process. We present here a detailed investigation of the pressure dependence of this anomaly in a wide temperature range 5–300 K. The evo…
This work describes a comparative study carried out on the reactivity and on the development of the porosity of a carbon fiber when it was gasified with supercritical CO 2 (SCCO 2 ) and with CO 2 at atmospheric pressure (ATCO 2 ). The kinetic results show that for the same temperature the rate of gasification of the f…
We have determined the magnetic structure of the field-induced phases of the multiferroic hexagonal manganite $\mathrm{Ho}\mathrm{Mn}{\mathrm{O}}_{3}$ by combining integrated intensity data, collected with unpolarized neutrons on a single crystal, with measurements of the polarization dependence of the intensities of…
NiAl shape memory alloy thin films have been fabricated by a solid-state reaction in Al/Ni bilayer films. Two kinds of synthesis have been used. The first one consists in heating an Al/Ni bilayer film system to temperatures above 480 K. The second one implies the successive deposition of nickel and aluminum films onto…
A silicon interlayer was introduced between the DLC films and 202 stainless steel substrate using a medium frequency magnetron sputtering. The adhesion was evaluated by the scratch tests and wear tests together. Two main parameters in the deposition process of Si interlayers, i.e. the sputtering current and pulse bias…
We have developed Crystal Catcher, a new device for manipulating protein crystals. Crystal Catcher directly captures a crystal with an adhesive. The easy and stable removal of a protein crystal from a drop has been achieved using the Crystal Catcher. The crystal picked up on the Crystal Catcher is positioned in the cr…
This paper presents a preliminary investigation of the effectiveness of two novel magnesia-based cements in the stabilization/solidification of contaminated soils. The first is a reactive magnesia cement, which includes significant quantities of fly ash and in some cases also contains Portland cement. Magnesia cements…
Abstract We have used seven different techniques to measure the anisotropic refractive index of poly(vinylcarbazole) films. These techniques are: two types of variable angle spectroscopic ellipsometry (VASE) with multiple sample analysis, Interference enhanced VASE, Transmittance combined with VASE, Polarised Reflecta…
The geometries and UV-vis spectra of azobenzene dyes grafted as a side chain on poly(l-glutamic acid) have been investigated using a combination of quantum mechanics/molecular mechanics (QM/MM) and time-dependent density functional theory (TD-DFT) methods at the TD-PBE0/6-311+G(d,p)//B3LYP/6-311G(d,p):Amber ff99 level…
Natural fibers are excellent substitute materials for man made fibers in making fiber reinforced composites due to their high specific strength and modulus, low density, low price, easy availability in some countries, recyclable and degradable properties. They have raised great attentions among material scientists and…
The structure of Ca 0.37 Sr 0.63 TiO 3 perovskite has been carefully investigated using electron and neutron diffraction. Electron diffraction supports the supercell and Pbcm space group previously proposed, while high resolution neutron powder diffraction data provide the basis for a new structure refinement. The dis…
Abstract Passive targeting is one of the approaches to reduce the side effects in intravenous chemotherapeutic administration. This is usually achieved by using so‐called ‘stealth’ particles as carriers, such that the particles can avoid uptake by cells of the reticulo endothelial system (RES) and thus enhance their b…
Under hydrothermal conditions and extremely high NaOH activity, ZnS forms nanostructures with complex morphologies that are based upon individual or interpenetrating nanosheets. Nanostructure morphology is independent of the size of the ZnS precursor (3 nm, 20 nm, or bulk) but varies systematically with NaOH concentra…
Doping difficulty in semiconductor nanocrystals has been observed and its origin is currently under debate. It is not clear whether this phenomenon is energetic or depends on the growth kinetics. Using first-principles method, we show that the transition energies and defect formation energies of the donor and acceptor…
WO3 and Ti-doped WO3 electrochromic films were prepared by mid-frequency dual-target magnetron sputtering method. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM) and spectrophotometer were used to characterize the structure, morphology, composition and transmitta…