Materials Literature
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The influence of different rare‐earth sintering additives (Y, Yb, Lu) on the wear properties of Si 3 N 4 ceramics was investigated during sliding contact without lubricant. The kind of rare‐earth additives was shown to have a significant effect on the wear behavior for contact sliding under the present testing conditi…
Abstract This research work has concerned a study on toughness of PVC/natural rubber (NR) blends compatibilized with epoxidized natural rubber (ENR). The aim of this work was to investigate the effect of degree of epoxidation on morphology and mechanical properties of the blends. Epoxidized natural rubber with a varie…
The new germanates Ba 2 GeSe 4−δ Te δ (δ < 2.5) were prepared by reacting the elements under exclusion of air at 800°C, followed by slow cooling to room temperature. These germanates form the Sr 2 GeS 4 type, monoclinic space group P2 1 /m, with lattice dimensions of a = 699.58(4), b = 709.38(4), c = 917.38(6) pm,…
The lattice parameters, cell volume, and structure of a sample of phase pure triclinic tricalcium silicate were determined using in situ, high‐temperature synchrotron powder diffraction and full‐profile Rietveld refinement. The temperature range covered was from ambient to 740°C. Evidence of superstructure was found.…
The monolayer behavior of the azobenzene derivative 8Az3COOH is shown to depend significatively on temperature and on the isomeric (trans-cis) composition. For pure trans monolayers, important temperature effects in the mesoscopic organization (as revealed by means of Brewster angle microscopy, BAM) are observed for t…
Hydrogen-terminated diamond films have been investigated by Contact Potential Difference Measurements (CPD or Kelvin force), Hall-effect experiments and theoretical calculations where the Schrödinger and Poisson equations have been solved to calculate the density of state (DOS) distribution at the surface of hydrogen…
Tungsten nitride (WNx) is a potentially strong candidate for Cu diffusion barrier. The WNx films were deposited by chemical vapor deposition (CVD) using W(CO)6 and NH3 sources at 430°C. The diffusion barrier properties of WNx were investigated by comparison with other materials. In order to study the barrier propertie…
In the presence of nonionic block-copolymer surfactant, nanocrystalline zirconia particles with MSU mesostructure were synthesized by a novel solid-state reaction route. The zirconia particles possess a nanocrystalline pore wall, which renders higher thermal stability compared to an amorphous framework. To further enh…
Abstract In this first paper, we have revisited Avrami's model and cast its basic equations into a differential system. This system is integrated numerically, which avoids unnecessary simplifying assumptions generally used in order to get analytical expressions. This allows us to introduce the variations of nucleation…
This paper extends a method for predicting rotational losses for laminated rotors of heteropolar magnetic bearings by using an eddy-current model to include the effect of magnetic hysteresis in the rotor material. It compares the modeling results to the experimental data that were used earlier to assess the loss model…
The optical spectra and the second-harmonic generation (SHG) are studied in a noncentrosymmetric GdFe3(BO3)4 magnet. In the region of weak absorption (α∼20–400 cm−1) below ∼3 eV, three absorption bands are distinguished, which can be unambiguously assigned to forbidden electronic transitions from the ground 6 A 1 stat…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation U. A. Handge, P. Pötschke; Interplay of rheology and morphology in melt elongation and subsequent…
The paper examines factors and parameters that affect the additional losses produced in the rotor cage of an induction motor during a no-load test at synchronous speed. The analysis uses a numerical approach based on a finite-element step-by-step procedure, taking into account the rotor movement. Iron losses are evalu…
To investigate the unknown stereochemical course of the reaction catalyzed by the type-II isomerase, which interconverts isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP), a sample of [1,2-(13)C2]-IPP stereospecifically labelled with 2H at C2 was prepared by incubating a D2O solution of (E)-4-hydroxy…
Abstract It was reported that a nanocrystal ZnO had a thermal stabilizing effect for branched low‐density polyethylene (BLDPE). In this study, the thermal stabilizing effect of the nanocrystal ZnO was studied in more detail in comparison to a conventional, micron‐size ZnO using several polymers and a common antioxidan…
Stress migration (SM) or stress-induced voiding experiments were conducted for two back-end-of-line (BEoL) technologies: Cu/FTEOS and Cu/low-k. Experiments have shown the mean time to failure (MTF) depends on inter-layer dielectric (ILD) materials properties, ILD stack and metal line width. Stress migration is worse i…
Abstract The atomic force microscopy (AFM) technique is a powerful tool for studying surfaces and has been used to provide qualitative and quantitative information about nanometer‐scale matter properties that are often inaccessible by any other experimental technique. In this work AFM was used to evaluate the surfaces…
The dielectric properties of thin films with microemulsion (ME)-routed nanocrystalline BaTiO 3 particles were investigated in terms of the films' crystallinity and grain size. The ME method provided a clear emulsion of well-dispersed nanocrystalline BaTiO 3 particles. BaTiO 3 thin films were prepared by direct spin-co…
Lead titanate (PbTiO 3 ) thin film is a promising material for ultrahigh-density ferroelectric data storage systems, pyroelectric sensors and ferroelectric optical devices. In this study, high-quality epitaxial PbTiO 3 thin films were deposited on SrTiO 3 (100) and SrRuO 3 /SrTiO 3 (100) by a hydrothermal method. The…
Liquid crystal (LC) lens arrays are prepared using hexagonal-hole-patterned electrodes. Two lens array structures are studied. The LC lens arrays have a focal length that is tunable by adjusting the applied voltage. By using the electrodes with the hexagonal-hole arrays, the aperture of the lens array can be increased.