Materials Literature
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Many works have been attempted to propose fast methods to estimate the fatigue limit of materials. Fatigue limit is a high-cycle fatigue property that can be interpreted as a stress level above which the material is subjected to an accumulation of irreversible changes currently associated to the micro-plasticity activ…
We examined the magnetocaloric effect of Co(S 1- x Se x ) 2 , which shows typical itinerant electron metamagnetism, under high pressures up to 1.2 GPa. It was found that the magnetic entropy change, Δ S M , of x =0 increases with increasing pressure, while that for x =0.05 is not sensitive to pressure. For x =0.08, Δ…
The results of an experimental investigation and calculations of the influence of bolt holes and slit edges on the packet to packet variation of flux density in a three-phase, three-limb power transformer core, tested under no load are presented. The overall peak flux density was calculated from the induced voltage in…
Sufficiently high-coverage monolayer structures of cerium oxide nanocrystals modified with decanoic acid, with sizes of ∼9 nm, were fabricated on the surface using a silicon substrate modified with 3,4-dihydroxyhydrocinnamic acid where catechol group lied at the top. By doing this, no further pretreatment for the modi…
The effects of an optical excitation on the thermoreflectance spectra of a solid are studied. A photonic excitation with sufficient energy will cause a perturbation in the electron number density around the Fermi surface. As the number density changes, so do the plasma frequency and carrier scattering rates, creating…
Abstract A novel Y‐type poly[iminocarbonyloxyethyl‐5‐methyl‐4‐{2‐thiazolylazo‐4‐(1,2,2‐tricyanovinyl)}resorcinoxyethyloxycarbonylimino‐(3,3′‐dimethoxy‐4,4′‐biphenylene)] 4 containing 5‐methyl‐4‐{5‐(1,2,2‐tricyanovinyl)‐2‐thiazolylazo}resorcinoxy groups as nonlinear optical (NLO) chromophores, which constitute part of…
Abstract SiOC films made by the inductively coupled plasma chemical vapor deposition were researched the relationship between the dielectric constant and the chemical shift. SiOC film had the main Si‐O‐C bond with the molecule vibration mode in the range of 930∼1230 cm ‐1 which consists of C‐O and Si‐O bonds related t…
A novel and simple method for gold nanoshell synthesis with controllable core and shell sizes is reported here. A new 'tree-shape' surfactant bis(amidoethyl-carbamoylethyl) octadecylamine (C18N3) was synthesized and used as the glue for the fast combination of gold nanoparticles and the subsequent gold shell outside.…
Morphological transitions such as the order-to-order transition (OOT) and the order-to-disorder transition (ODT) for an asymmetric polystyrene- block -polyisoprene (PS- b -PI) were investigated in bulk and film. The PS-rich block copolymer (BCP) bulk possessed the lamella morphology (LAM), which transformed to the gyr…
The kinetics of nanoparticle (NP) adsorption on a model biological interface (collagen) is measured in microfluidic channels using surface plasmon resonance (SPR) imaging over a range of CdSe/ZnS quantum dot concentrations to investigate the underlying binding process. Spherical CdSe/ZnS core-shell NP, derivatized wit…
Substituted Li ferrites with chemical composition Li0.5+0.5t-0.5xFe2.5-1.5t-0.5xTitZnxO4, wherex= 0.20 andt= 0.35, 0.45, 0.55 with additions of 0.005 Bi2O3and 0.05 MnO2were synthesized by ceramic method and from solutions of metallic salts and citric acid. The intrinsic and extrinsic magnetic properties were measured…
This paper deals with the analytically described iron core model of a midfrequency resistance spot welding transformer. This model considers eddy currents, hysteresis, and the saturation effect in a laminated iron core. The proposed model is simple, based on parameters that can be obtained from a data sheet, and is ea…
We investigate the role of local force balance in the transition from a microcanonical ensemble of static granular packings, characterized by an invariant stress, to a canonical ensemble. Packings in two dimensions admit a reciprocal tiling, and a collective effect of force balance is that the area of this tiling is a…
Most of the papers in the literature dealing with magnetic losses present results obtained with flux metric methods. But those techniques of measurement are known to be inaccurate when the voltage and current probes of the device introduce a significant phase shift at high frequencies. As a consequence, it is importan…
Photovoltaic response from semiconducting single-walled carbon nanotubes/n-type GaAs heterojunctions has been investigated. We propose a detailed device model of the photovoltaic cell, in which electron transport can be described as follows. The thermionic emission and tunneling through the spike barrier caused by the…
The magnetic field analysis results on grain-oriented silicon steel sheet and nongrain-oriented silicon steel sheet by the isotropic method, the two-axis isotropic method, the two-axis anisotropic method, the ¿ anisotropic method, and the ¿HBanisotropic method, which are 2-D magnetic analysis methods, are compared. In…
We report a first-principles investigation of transport through longitudinal unzipped carbon nanotube based devices. The graphene nanoribbons can be obtained experimentally by unzipping carbon nanotubes in the longitudinal direction. The basic component of our devices is partially unzipped carbon nanotube that consist…
The electroluminescence from an n-MgZnO/i-ZnO/MgO/p-GaN asymmetric double heterojunction has been demonstrated. With the injection of electrons from n-MgZnO and holes from p-GaN, an intense ultraviolet emission coming from the ZnO active layer was observed. It is revealed that the emission intensity of the diode recor…
An experimental investigation has been performed to study the efficiency of NO reduction by three technological approaches: reburning by methane, selective noncatalytic reduction (SNCR) by ammonia, and a hybrid approach by coupling reburning and SNCR. Experiments were performed on a lab-scale reactor equipped with a M…
Abstract The effect of network formation on the secondary (Johari–Goldstein) β‐relaxation was investigated for polyvinylethylene (PVE). Crosslinking affects the segmental (α‐) process in the usual fashion, the networks exhibiting slower and more temperature‐sensitive dynamics. However, the effect on the β‐process is t…