Materials Literature
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In order to consider a phase selection in a ternary eutectic system, analytical expressions for three-phase planar eutectic growth have been derived, assuming the geometries as regular, rod+hexagon and semi-regular types. Irrespective of geometries the relations that the undercooling is proportional to the square root…
The crystallizability of narrow composition, homogeneous ethylene/1-octene copolymers made with a constrained geometry catalyst, measured by CRYSTAF, follows a straight line correlation with the amount of total comonomer incorporated. The potential use of these resins as standards to calibrate CRYSTAF and TREF techniq…
Molecular dynamics simulation of a generic polymer model is applied to study melts of polymers with different types of intrinsic stiffness. Important static observables of the single chain such as gyration radius or persistence length are determined. Additionally we investigate the overall static melt structure includ…
We report on recent advances in the modeling of magnetic losses in steel laminations used in electromagnetic devices. The integrated-lamination moving dynamic Preisach model, used to evaluate the dynamic magnetization loops under distorted unidirectional flux patterns, is described. The main goal is the comparison of…
Abstract A mixing‐precipitation model (based on engulfment, the E‐model by Baldyga and Rohani, 1987) is applied to a single‐feed semi‐batch precipitation process to describe the mixing effects on the final particle‐size distribution (PSD) and particle morphology. The model describes mixing on two scales: the microscal…
Co(III) or Mn(III) ions that replace some 4 atom% of Al(III) sites in microporous aluminophosphate number 36 (AlPO-36) function as catalytically active centres for the production from benzaldehyde of acylperoxy radicals: these, in turn, in dry air (30 bar) convert cyclohexene, pinene, limonene and styrene to their cor…
The synthesis, structure and magnetic properties of a series of hybrid organic-inorganic copper(II) compounds are reported. Anion exchange reactions were used to prepare layered materials made of copper(II)-based inorganic layers separated by long chain anions (n-alkyl sulfates or n-alkyl carboxylates). Contrary to cl…
Acceptor doped perovskites such as strontium cerate form a variety of point defects through reaction with surrounding gases at high temperature, namely protons by dissolution of water vapour, electron holes by dissolution of oxygen and electrons by loss of oxygen. The defect equilibria can be described by three equili…
A report on the preparation and potential applications of sculptured thin films (STFs) is presented. STFs are nano-engineered columnar thin films in which the columnar direction can made to change easily and often during growth. STFs of virtually any material can be prepared through directional vapor deposition onto a…
Directional solidification and laser experiments have been performed in Fe-18.0%Cr-Ni alloys to evaluate the effects of alloy composition and growth velocity on microstructure and phase selection. Solidification microstructure selection maps are described by microstructure (dendrite/cell, plane front and eutectic) mod…
Synthetic flavylium compounds can exist in several forms (multistate) that can be interconverted by more than one type of external stimulus (multifunctional). The intricate network of their reactions, when examined from the view point of ‘molecular-level devices’, reveals very interesting properties.
By selection of appropriately sized rare earth elements and suitable reaction atmosphere, a new double-perovskite-type iron oxide REBaFe 2 O 5+ w (RE=Nd and Sm) has been synthesized, with, ideally, all Fe atoms in square-pyramidal coordinations when w=0. Like in the related triple-perovskite-type YBa 2 Fe 3 O 8+ w ′ ,…
The interactions of naked and surface-modified poly(D,L-lactic acid) (PLA) nanocapsules (NC), where polyethyleneglycol (PEG) was adsorbed or covalently attached, have been studied with a macrophage-like cell line. The fluorescent oil marker, DiD, was successfully encapsulated in NCs in order to follow their interactio…
A versatile electrochemical grafting reaction connects conjugated molecules to porous silicon surfaces with either a positive or negative bias.
Dynamic response prediction of vehicle bodies is important for vehicle crashworthiness evaluation. The dynamic behaviour of vehicle body materials is dependent on material strain rates. One of the typical high strain rate tensile tests is the split Hopkinson bar test. In this paper, experiments have been conducted bas…
Magnesium Deposition and Dissolution Processes in Ethereal Grignard Salt Solutions Using Simultaneous EQCM‐EIS and In Situ FTIR Spectroscopy, Aurbach, Doron, Moshkovich, Moty, Schechter, Alex, Turgeman, Rachel
Three oligonuclear complexes of copper(II), [{Cu(Hfsaaep)Cl}2] 1, [{Cu(fsaaep)(H2O)}2] 2 and [Cu3(fsaaep)2][ClO4]2 3 have been synthesized, using the unsymmetrical tetradentate Schiff-base ligand 3-[N-2-(pyridylethyl)formimidoyl]salicylic acid, H2fsaaep. The crystal structures of complexes 1 and 2 have been solved. Th…
X-ray diffraction, differential scanning calorimetry and reflected light microscopy studies are made of disorder-order phase transformations in the region of homogeneity of a non-stoichiometric cubic vanadium carbide, (0.66 < y < 0.88). It is found that according to the composition of the carbide, both an ordered phas…
The pseudoelastic stress/strain hysteresis behavior observed in nickel-titanium (Ni-Ti) shape memory alloys (SMAs) above the austenite finish temperature can be exploited to provide passive structural damping in a variety of applications. The present study characterizes the damping behavior of Ni-Ti SMAs using the com…
An experimental study was performed to determine the effect of aging on martensitic transformations in NiTi, Polycrystalline and single crystal NiTi ([100], [110], and [111] orientations) were both considered, Stress-induced transformations in polycrystalline NiTi were found to closely resemble transformations in sing…