Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Carbon nanotubes were synthesised within the pores of an alumina membrane. The membrane had 200 nm diameter pores and 60 microm thickness, and ethylene was used as carbon source. Membrane dissolution by HF results in a bundle of parallel open tubes, aligned without macroscopic defects. The external diameter of the tub…
The formation of trigonal GdFe 3 (BO 3 ) 4 crystals in the Bi 2 Mo 3 O 12 -B 2 O 3 -Li 2 MoO 4 -Gd 2 O 3 -Fe 2 O 3 system was studied. The flux compositions for which GdFe 3 (BO 3 ) 4 is the high-temperature phase with a wide range of crystallization were determined. The features of nucleation of these crystals and th…
One possible failure mechanism of products containing polyimide dielectric is deadhesion of polyimide from neighboring metallization. Deadhesion usually occurs due to the combined damage mechanisms of environmental aging and fatigue. In this paper, the rate of aging of Kapton-E polyimide is quantified as a function of…
Comparing to conventional short-pulse (<30ns) excimer laser annealing, the extended pulse (374ns) can provide sufficient thermal energy and time into the Pb(Zr1−xTix)O3 (PZT) thin film to complete the crystallization, whereas the bulk of the material remains at low temperature. In this study, thermal simulation…
In this paper, using wet chemical solution deposition processes, the (100)-highly oriented LaNiO3 buffer layers were grown on both silicon and platinized silicon wafers and, sequentially, the highly (100)-oriented PbZr1−xTixO3 thin films with various compositions were obtained on them. The misfit elastic strains were…
We outline the strategy and constraints adopted for the design of medium-power lead-alloy–cooled actinide-burning reactors that strive for a lower cost than accelerator-driven systems and for robust safety. Reduced cost is pursued through the use of (1) a modular design and maximum power rating to capitalize on an eco…
The roles of point defects and defect complexes governing nonradiative processes in ZnO epilayers were studied using time-resolved photoluminescence (PL) and slow positron annihilation measurements. The density or size of Zn vacancies (VZn) decreased and the nonradiative PL lifetime (τnr) increased with higher growth…
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…