Materials Literature
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Ferrite material properties may vary depending on the grade and manufacturer. Moreover, there are differences between batches and also the production process may change in time. The same material grade may have improved or reduced performance depending on the year of production. In loss critical applications it is goo…
Subject to a continuing debate, cryogenic treatments of alloy steels have been claimed to significantly increase wear resistance and toughness through the interplay of three effects: completing martensitic transformation, promoting uniform precipitation of fine carbides and imparting residual stresses. This study reex…
Highly oriented ZnO ordered pore arrays (films) were electrochemically deposited on substrate based on colloidal monolayer template. Such oriented porous film has a preferential orientation along c -axis and shows strong and steady ultraviolet photoluminescence at room temperature, accompanied by a much weaker visible…
The preparation and structural characterization of a novel Ti-O-Ti bonding complex constructed in the mono-lacunary alpha-Keggin polyoxometalate (POM), are described. The water-soluble, crystalline complex with a formula of K5H2[[{Ti(OH)(ox)}2(micro-O)](alpha-PW11O39)] x 13H2O 1 was prepared in 30.2% (0.60 g scale) yi…
Selective laser sintering is used to prepare components from a kind of blended powder of polyamide 12 (PA12) and organically modified rectorite (OREC). The effects of OREC on the sintering parameters and mechanical properties of the sintered specimens are investigated. The results show that the laser power needed for…
Sr3Fe2UO9 double perovskite has been prepared in polycrystalline form by a solid state reaction, in air. This material has been studied by X-ray diffraction (XRD), neutron powder diffraction (NPD) and magnetic measurements. At room temperature, the crystal structure is tetragonal, space group I4/m, with a = b = 5.6994…
A quasi-quantitative photo-induced low-spin (LS)-->high-spin (HS) conversion of FeII ions has been observed in the [Fe(TRIM)2]Cl2 complex by irradiating the sample with blue light (488 nm) at 10 K. The time dependence of the HS-->LS relaxation has been studied between 10 K and 44 K by means of magnetic susceptibility…
Directionally solidified B4C–TiB2–SiC composites were prepared by a floating zone method using B4C, TiB2 and SiC as starting materials. The B4C–TiB2–SiC system was ternary eutectic whose eutectic composition was 51.2B4C–8.1TiB2–40.7SiC (mol%). The ternary eutectic composite showed a lamellar microstructure where B4C(1…
In situ synchrotron FTIR experiments have been performed during evaporation-induced self-assembly (EISA) of mesoporous films and the role of silica polycondensation in obtaining highly organized mesostructures has been illuminated.
OBJECTIVE: The use of transgenic and knockout mice has led to a need for a consistent model of mouse transient focal cerebral ischemia. In a great majority of the published mouse middle cerebral artery (MCA) occlusion studies, the methods indicated the type of intraluminal suture used without indicating the actual sut…
Isothermal crystal growth from evaporating fluxes of alkaline chlorides allowed the reproducible, high yield synthesis of micron thick and millimetre long whiskers of two manganese-rich phases, BaMn8O16 hollandite and Ba6Mn24O48 manganite, with a tunnel crystal structure. The crystal morphology suggests that they grow…
We report the preparation and magnetic properties of magnetite Fe 3 O 4 nanostructures grown by electrodeposition in the form of ( i ) nanocrystalline film (200 nm thick) and ( ii ) nanocylinders (50 nm diam, 200 nm long) inside the pores of polycarbonate membranes. According to x-ray diffraction and magnetic measurem…
Abstract This article analyzes the estimates of the cost of corrosion, made in various countries at various times. The data are extrapolated to a 2004 base and then projected to the global economy. The chronological order of the countries are the United States of America, the United Kingdom, Australia, Japan, Canada,…
To reach its most competitive long-term position, photovoltaics must push towards ever-increasing energy conversion efficiency while retaining low areal production costs. The most developed approach for improving this efficiency beyond that of a standard cell is to use a tandem stack of cells, with each cell in the st…
Dislocations influence many properties of crystalline solids, including plastic deformation, growth and dissolution, diffusion and the formation of polytypes. Some of these processes can be described using continuum methods but this approach fails when a description of the structure of the core is required. To progres…
Abstract Several key issues concerning surface‐enhanced Raman scattering (SERS) are discussed, especially the surface orientation of the adsorbate, the enhancement mechanism relevant in a particular experiment, and the dependence of SERS frequencies and intensities on the electrode potential. It is shown that ab initi…
This study represents a preliminary stage in the development of a process aimed at the selective uptake and release of metal ions from wastewater. The process involves the immobilisation of highly selective natural chelates secreted by bacteria or other living species inside mesoporous micelle-templated silicas (MTS)…
The copper(I) complexes of diphenylglycoluril basket receptors and , appended with bis(2-ethylpyridine)amine (PY2) and tris(2-methylpyridine)amine (TPA), respectively, and their dioxygen adducts were studied with low-temperature UV-vis and X-ray absorption spectroscopy (XAS). The copper(I) complex of, [.Cu(I)2] or, fo…
A carboxyl-containing conducting oligomer, poly(pyrenebutyric acid) (PPBA), has been synthesized for non-covalent sidewall functionalization of single-walled carbon nanotubes (SWNTs) by direct oxidation of α-pyrenebutyric acid (PBA) in boron trifluoride diethyl etherate (BFEE) containing SWNTs. The initial feeding wei…
Polycarbonate (PC)/acrylonitrile-butadiene-styrene (ABS) polymer alloy/montmorillonite (MMT) nanocomposites were prepared using a direct melt intercalation technique. The pyrolytic degradation and the thermo-oxidative degradation of the polymer alloy and the nanocomposites were studied by thermogravimetric analysis (T…