Materials Literature
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The chemical composition and the valence state of elements on the surface of ZrO2 thin films deposited on glass substrates have been studied by X-ray photoelectron spectroscopy. Results show that: elements of Na, Mg, Zr, Ca exist in the form of their respective stable state, such as Na2O, MgO, ZrO2, CaO, when heat tre…
Polyethylene terephthalate (PET) microfiber of 1.5 denier per filament (dpf) has been irradiated with 3-MeV proton at two different fluences: 1 × 1013 and 1 × 1015p/cm2. Molecular deformation because of in-air proton irradiation straining of PET filaments has been investigated. Study of the effects of irradiation by u…
A mathematical model is presented to determine the fracture parameters of a finite impermeable crack with one or more branches in a magnetoelectroelastic plane subjected to the remote mechanical, electrical and magnetic loading. An integral equation approach based on the fundamental solution for a generalized dislocat…
Composite represent a number of systems of multi phase is nature of alliance that is alliance matrix materials or fastener with lasing. Of the merger will yield composite materials which have the nature of mechanical and different characteristic of its material, so that can be planned a composite material which wanted…
The characteristics of adhesive joints of aluminium sheet containing epoxy based composite adhesives containing nanofiller of ZrO2 powder have been studied. The composite adhesives containing 10, 15 and 20wt.% of about 20±3 nm size ZrO2 powder are applied to mechanically treated aluminium substrates. The single lap jo…
(dpp-BIAN)Mg(THF) 3 (1) (dpp-BIAN = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) and (PhCOO) 2 react with splitting of the peroxide bridge and formation of the dimeric magnesium benzoate [(dpp-BIAN)MgOCOPh(THF)] 2 (2). The reaction of 1 with PhCOOH yields the dimeric magnesium benzoate [(dpp-BIAN)(H)MgOCOPh(THF)…
Structure and stability of pristine and modified NaAlH4 are first investigated using density functional theory (DFT) with plane-wave basis and PW91 functional. Vacancy and Ti-dopant effects in the sodium alanate bulk, (0 0 1) surface, and on-top (0 0 1) surface are then studied considering Na and interstitial lattice…
Near-IR emission of novel Yb(III) complexes with phenanthroline derivertives, bis(phenanthroline)-tris(bis-perfluoromethanesurfonyliminate)ytterbium [Yb(pms) 3 (phen) 2 ] and dipyridophenazine-tris(bis-perfluoromethanesurfonyliminate)ytterbium [Yb(pms) 3 (dip)] are studied in dimethylsulfoxide [DMSO- d 6 ]. The emissi…
This paper analyzes the alloy composition characteristics with large hydrogen storage capacities in Laves phase-related BCC solid solution alloy systems using the cluster line approach. Since a dense-packed icosahedral cluster A 6 B 7 characterizes the local structure of AB 2 Laves phases, in A-B-C ternary system, suc…
Magnetic tunnel junctions (MTJs) with half-metallic electrodes are expected to show a large tunnel magnetoresistance (TMR) ratio, according to Julliere's model. A Co 2 MnSi Heusler alloy is theoretically expected to possess a half-metallic electronic state. Experimentally, at low temperature, Co 2 MnSi(100)/Al-oxide/C…
Using the electron density functional theory, the electronic structure and magnetic properties of possible contacts on the (001) interface between XYZ and X 2 YZ Heusler alloys (NiMnSb, Co2 MnSi) and III–V semiconductors (InP, GaAs) are studied. It is demonstrated that, in both cases, the high degree of spin polarizat…
Deviations of the predicted solubilities using the Jouyban-Acree model from experimental data were correlated to the structural descritptors of the drugs computed by HyperChem software. The proposed models are able to predict the solubility in water-cosolvent mixtures and reduced the mean percentage deviations (MPD) o…
Abstract The crystallization of alkali‐earth phosphates in the melts of Cs 2 O‐P 2 O 5 ‐M II O (M II – Ca, Sr, Ba) pseudo‐ternary systems have been investigated at various Cs/P molar ratios and at fixed value of M II /P equal to 0.15. Type of the phosphate which crystallizes in melts depends on the Cs/P initial ratio.…
Ge nanocrystals were formed by electron beam evaporation on SiO2 covered Si substrates. The size and distribution of the nanocrystals were studied by atomic force microscopy, scanning electron microscopy and cross-sectional transmission electron microscopy. Dependencies of the nanocrystal size, of the nanocrystal surf…
Objective of the collaboration of TU Graz and DLR Cologne is the measurement of specific electrical resistivity comparing pulse-heating and levitation results. The TU Graz measurements on V, Nb, Ta, Mo and W will be presented and discussed with regard to volume expansion and resistivity.
The study of the Mandelbrot set (MS) is a promising new approach to the phase transition theory. We suggest two improvements which drastically simplify the construction of the MS. They could be used to modify existing computer programs so that they start building the MS properly not only for the simplest families. Thi…
Abstract Inorganic calcite precipitation experiments were conducted to determine whether inducing specific orientations of calcite crystal growth can cause the enrichment of cations larger than Ca. Malonic acid (CH 2 (COOH)), a di-carboxylic acid, was used to poison growth on acute kink sites, promoting growth on obtu…
The morphology of a phase-separated binary film during spinodal decomposition, whose evolution is limited on the growth surface, is studied. The temporal evolution of the Cahn–Hilliard equation without the elastic energy term under frozen bulk approximation is solved to investigate the possibility of well-aligned nano…
The effect of vanadium on microstructures and properties of Fe–Cr–C self-shielded metal cored hardfacing alloys was investigated with four hardfacing alloys that contain 0˙73, 2˙3, 3˙1 and 4˙1% vanadium respectively. The effects of vanadium element on microstructures and mechanical properties were analysed. Results in…
Films of polymethyl methacrylate and methyl methacrylate copolymers with ethylhexyl acrylate doped with HAuCl 4 were subjected to UV irradiation followed by thermal treatment at various temperatures. The films were studied by absorption spectroscopy and small-angle X-ray scattering. The photolysis of HAuCl 4 was found…