Materials Literature
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A facile method was proposed for the synthesis of carbosil particles. In this method, silica particles were first saturated with carbon precursor solution (styrene, divinylbenzene, or their mixture). After the subsequent polymerization and carbonization process, carbosils were successfully prepared. The carbon content…
Abstract ZnO‐based thick film varistors have been fabricated by Y 2 O 3 doping and low‐temperature sintering, of which the sample with the best electrical properties has a high potential gradient value of 3159.4 V/mm. The effects of Y 2 O 3 doping concentration and sintering temperature on the potential gradient of th…
Abstract The dynamic fracture behavior of TA15ELI alloy with lath‐like microstructure was studied by caustics method. Specimens with double‐side pre‐notch were tested under the plane‐stress condition at mode‐II loading with a drop hammer system. Caustics information recorded in films illustrated the histories of both…
The inspection of volume fraction of retained austenite in the high chromium cast iron is important in keeping the quality and hardness of abrasion proof components as a steel of hot-rolling etc. The permeability and the conductivity of the cast iron are decreased when the volume fraction of retained austenite is incr…
The inelastic deformation behavior of PMR-15 neat resin, a high-temperature thermoset polymer, was investigated at 316°C. The experimental program was designed to explore the influence of strain rate on tensile loading, unloading, and strain recovery behaviors. In addition, the effect of the prior strain rate on the r…
Ca(Zn1/3Nb2/3)O3 powders were synthesized by molten salt synthesis method in NaCl–KCl flux at a low temperature of 700°C for 2 h, which is lower than that of the conventional solid-state reaction. This simple process involved mixing of the raw materials and salts in a certain proportion. Subsequent calcining of the mi…
Depth-resolved positron annihilation studies have been carried out on nitrogen-implanted Si to investigate defect evolution and thermal stability. Si(1 0 0) wafers have been implanted with 60 keV N+ ions to a fluence of 1 × 1014 and 1 × 1015 ions/cm2. From positron diffusion analysis of defect-sensitive S-parameter pr…
Ultrasound welding is used widely in the production of components from styrol-based plastics for technical and household applications. However, analysis of the reasons for the low quality of welded...
The energy spectra and magnetic properties of one-dimensional stacks consisting of polycyclic aromatic hydrocarbons with Schottky, chemisorption, and Tamm-chemisorption-type surface defects are investigated theoretically by means of the many-electron band theory. The effective spin-exchange interaction between the ele…
The title compound, C(27)H(39)N(2) (+)·C(24)H(20)B(-)·2CH(2)Cl(2), is the first reported imidazolidinium cation with the sterically demanding 2,6-diisopropyl-phenyl groups in the 1,3-positions. The crystal structure is stabilized by weak inter-molecular C-H⋯π(arene) inter-actions. Due to the bulky nature of both the f…
The magnetic modeling of Si-Fe magnetic steels is presented in this paper. The modeling is based on a class of vector hysteresis operators recently introduced. The vector approach works without the additional manipulations and the corrections of the scalar case. The distribution of the probability function of the vect…
Abstract Undoped zinc oxide thin films were grown at room temperature using two techniques: plasma deposition (PD) and electron beam evaporation in an argon atmosphere. PD offers some advantages, such as low ion damage and low deposition temperature. The optical transmittance of the films deposited by both methods was…
Abstract The energy, electronic structure, and magnetic and mechanical properties of LaNi 5 compound have been studied by the first‐principles method based on the density functional theory. The results show that the calculated lattice parameters of LaNi 5 compound are almost the same with the experimental ones, and th…
We present a study on the effect of added CsCl and of temperature variation on the chiral induction in a chiral nematic lyotropic liquid crystal (LC) composed of the surfactant cesium perfluorooctanoate (CsPFO), water, and the chiral dopant d-Leucine (d-Leu). The chiral induction was measured as the helical pitch P. T…
Abstract Kapton® polyimide was carbonized at 873, 1073 and 1273 K with a heating rate of 1, 3 and 5 K min–1 and applied to the dehydration of methanol, ethanol and isopropanol by pervaporation. Lowering the heating rate or increasing the carbonization temperature resulted in higher selectivity and a decrease in permea…
Abstract Suppression of anomalous radial transport of alpha particles and beam ions due to energetic ion driven MHD in‐stabilities is one of the critical issues toward D‐T burning plasma experiments in toroidal magnetic confinement devices such as tokamaks and stellarator/helical devices. This paper reports the charac…
This paper describes an efficient approach for time domain sensitivity analysis of lossy high speed interconnects in the presence of nonlinear terminations. The sensitivity information is derived using the recently developed passive method of characteristics. An important feature of the proposed method is that the sen…
Abstract The spinodal decomposition of a polymer–polymer–solvent ternary blend spin coated on heterogeneously functionalized substrate is studied in a three‐dimensional numerical model. The Cahn‐Hilliard equation was used to describe the free energy profile of the domain. The mechanism of the morphology evolution was…
Oligomerizing to point-group symmetry, protein oligomers need to have the symmetry broken for biologically crucial functions, such as, allosteric regulation, enzyme catalysis, and so forth. In the making of symmetry, based on self assembly, and the breaking of symmetry, based on intermolecular interactions, proteins m…
A generalized version of the nonequilibrium linear Glauber model with q states in d dimensions is introduced and analyzed. The model is fully symmetric, its dynamics being invariant under all permutations of the q states. Exact expressions for the two-time autocorrelation and response functions on a d-dimensional latt…