Materials Literature
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The analysis performed in this paper is based on the concepts of a heterogeneous nucleation and related controlling wave process. It is assumed that this wave process initiates a very rapid rearrangement of the atomic planes {110} c of the cubic phase into the basal planes {0001} h of the hexagonal phase. It is shown…
A presença de gradiente textural é comum e marcante em Argissolos. O objetivo do trabalho foi estudar a mineralogia das partículas envolvidas no processo de formação de gradiente textural em um solo subtropical do Rio Grande do Sul. Amostras de um Argissolo Vermelho-Amarelo distrófico abrúptico, material parental sedi…
To safeguard bodies of soldiers better, including their necks and joints, a novel armour material was exploited using nanocomposite. Compared with traditional armour materials, this new material possessed superior barrier property and more comfortable characteristics. The new armour material was made of Kevlar cloth a…
Nanocompósitos de polietileno de alta densidade/argila bentonita nacional foram preparados por intercalação por fusão. A influência da adição da argila sem tratamento e da argila tratada com o sal quaternário de amônio Cetremide e do polietileno graftizado com anidrido maléico (PE-g-MA) como agente compatibilizante fo…
We determine periodic and aperiodic points of certain piecewise affine maps in the Euclidean plane. Using these maps, we prove for $\lambda \in \left\{ \frac{\pm 1 \pm \sqrt{5}}{2}, \pm \sqrt{2}, \pm{\sqrt{3}} \right \}$ that all integer sequences $(a_{k})_{k \in \mathbb{Z}}$ satisfying $0 \leq a_{k-1}+\lambda a_{k} +…
This paper will give an introduction to the emerging technology of Phase Change Memory (PCM) and review the state of the art, focusing on basic phase change material properties, critical PCM device characteristics, PCM device scaling, reliability issues, and processing challenges.
The structural changes in copper samples (99.90% Cu) subjected to severe plastic deformation using a shock loading technique have been studied. The samples are extruded through two or three channels disposed at an angle of 90°. The microstructure of the copper samples changes under the simultaneous action of high-rate…
Nanocrystalline samples of ZnO doped with Fe2O3 were synthetized by wet chemical method. The series of ZnO nanosized samples in the wide range of Fe2O3 concentration (from 5 wt.% to 95 wt.%) was prepared by precipitation from nitrate solutions using ammonia. The phase composition of the samples was determined using X-…
Ethanol extract and its ethanol fraction from aerial parts of P. daemia exhibited significant hepatoprotective effect against CCl4 induced hepatotoxicity in rats. Glutamic oxaloacetic transaminase, glutamic pyruvic transaminase, alkaline phosphatase, total bilirubin, total cholesterol, total protein and albumin in ser…
Abstract Summary: Coinage metal salts (e.g. Au III , Ag I and Cu II salts) readily react with thiols to give the corresponding metal(I) thiolates. These thiolate species are known to either self‐assemble into insoluble polymeric species or to form soluble oligomers, depending on the nature of the thiol ligand. Here we…
Abstract Studies of benthic diatom communities in the surface sediments of the Swarzewo area of Puck Bay were carried out during 1998 and 1999 in order to assess water quality, and in particular the organic load. Among the 192 taxa identified, teratological forms of diatoms were recorded in 17 diatom species, primaril…
Fabrication of Volcano-Structured Double-Gate Field Emitter Array by Etch-Back Technique, Soda, Takashi, Nagao, Masayoshi, Yasumuro, Chiaki, Kanemaru, Seigo, Sakai, Toshikatsu, Saito, Nobuo, Neo, Yoichiro, Aoki, Toru, Mimura, Hidenori
A fundamental metric for the assessment of the recyclability and, hence, the sustainability of coated magnesium scrap is presented; this metric combines kinetics and thermodynamics. The recycling process, consisting of thermal decoating and remelting, was studied by thermogravimetry and differential thermal analysis (…
A new theoretical approach to the application of the enlargement law for assessing the breakdown performances of shielded power cables was illustrated in the companion paper (Part 1) of this series. In the present paper, practical case-studies of the proposed theory are presented. The so-called crossing quantities of…
Oligomers of hexakis(4-allyl-2-methoxyphenoxy)cyclotriphosphazene have been synthesized and their molecular structure studied by X-ray and NMR analysis. The nonplanar character of a phosphazene cycle is established, and the bond lengths P-N and valence angles N-P-N are shown to change in narrow ranges (1.5771–1.5894 Å…
This study is concerned with the prediction of the effective thermal conductivity of nanocomposite thin films consisting of nanoparticles randomly distributed in a solid matrix. Crystalline sodium chloride with embedded monodisperse silver nanoparticles is investigated as a case study for thin films where phonons are…
In MgF2:Mn2+, Eu2+ phosphors, the x-ray excited luminescence from Eu2+ is decreased while the emission from Mn2+ is increased in intensity with the increase of x-ray dose. In MgF2:Mn2+, the luminescence is also increased, and in MgF2:Eu2+, the emission of Eu2+ is also decreased in intensity with the increase of x-ray…
Ni0.4Zn0.6Fe2−xNdxO4(x = 0-0.07) ferrites doped with different amounts of Nd2O3 were prepared using standard ceramic technique. The samples were uniaxially pressed and sintered at 1250°C for 4 h in air. The phase structure and microstructure of the samples were investigated using X-ray diffraction and scanning electro…
Strontium hexaferrite is a promising material for magnetic nanoscale applications owing to its high coercivity and saturation magnetisation. Nanocrystallite strontium hexaferrite was prepared by self-flash combustion of acetate precursors. A 2 : 1 molar ratio of iron acetate to strontium acetate in the precursor was f…
The thermal degradation behavior of nanocomposites based on Styrene Butadiene Rubber (SBR), Polybutadiene Rubber (BR) and Acylonitrile Butadiene Rubber (NBR) with 19%, 34% and 50% acrylonitrile contents respectively, and sodium montmorillonite (designated as N) and octadecyl amine modified sodium montmorillonite (desi…