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。
Comparing efficacy of scale inhibitors for inhibition of zinc sulfide and lead sulfide scales. Thomas Henry Lopez; Thomas Henry Lopez Baker Petrolite Corp. Search for other works by this author on: This Site Google Scholar Mingdong Yuan; Mingdong Yuan Baker Petrolite Corp. Search for other works by this author on: Thi…
Air-gapped iron-cores are widely used for power reactors. Eddy currents are induced in silicon steel sheets due to fringing flux, and this causes local overheating. In order to avoid local heating and to design reactors with high efficiency, the analysis and experiments for evaluating local losses in the core block of…
Abstract The antioxidative action of phosphonites and phosphites depends on their structure, the nature of the polymer to be stabilized and the aging conditions. Phosphorus compounds can act in different ways: as hydroperoxide decomposers (secondary antioxidants), as free‐radical scavengers (primary antioxidants), as…
Abstract Cholesteric liquid crystal micro‐capsules (CLC‐MCs) with a perpendicular alignment shell were investigated. The CLC‐MC cell showed high contrast ratio up to 17:1, reflectance over 30% and uncolored white appearance in bright state. A photo‐addressable electronic paper using the CLC‐MC and an organic photocond…
Abstract The stability and migration product of medical PVC tubes plasticized with polyadipates were investigated by ageing in phosphate buffer at pH 1.679 and water at different temperatures. Changes in the PVC tubes were studied by water absorption, weight loss, Fourier infrared spectroscopy (FTIR), differential sca…
Abstract Triblock copolymers of poly(lactide)‐poly(ethylene‐glycol)‐poly(lactide) (PLA‐PEG 2000 ‐PLA) were synthesized by ring‐opening polymerization of lactide and PEG 2000 diol as co‐catalyst. Stereocomplexes with particle sizes ranging from nanometers to microns were obtained by mixing acetonitrile solutions of pai…
The low-temperature current-voltage characteristics of narrow-gap (Pb 1− x Sn x Te):In have been studied experimentally and calculated for a wide range of electric fields. It is shown that the obtained data are satisfactorily described in terms of a space-charge-limited current model in the presence of traps. The conc…
Abstract A positive uniaxial A‐film and a negative uniaxial A‐film compensated IPS LCD is proposed to widen the viewing angle characteristics by reducing the dark‐state light leakage at off‐axis oblique angles. Simulation results show that a contrast ratio greater than 200:1 is achieved within ±85° viewing cone.
In this study, an etching technique to detect the localised plastic deformation behaviour in a low carbon steel was developed. With this technique, etching with Fry solution under ultrasonic vibration was carried out on samples plastically deformed and then heated at 550°C for a certain period of time. The plastic zon…
Abstract Zircaloy fuel cladding suffers progressive degradation of ductility as its neutron exposure and hydrogen uptake increase with burnup. The loss of ductility appears to be the key property governing the cladding integrity in service. We report ductility data of Zircaloy-4 fabricated in stress-relief annealed (S…
Using eigenvalue analysis of mass and stiffness matrices directly computed from atomistic simulations, natural frequencies and mode shapes of various carbon nanotubes are studied. The stiffness matrix was developed from the Tersoff-Brenner potential for carbon-carbon interactions. The computed frequencies of the radia…
A method for coupling magnetostatic and magnetodynamic finite element formulations with lumped reluctances is developed. Two dual h and b-conform formulations are extended to define the necessary magnetic relations between the magnetic fluxes and the magnetomotive forces. Adequate surface scalar potentials are defined…
Summary In this paper, the transport and speciation of ruthenium under conditions simulating an air ingress accident was studied. Ruthenium dioxide was exposed to an oxidising environment at high temperatures (>1200 °C) in a tubular flow furnace. At these conditions, volatile ruthenium species were formed. A major…
Single crystals of MnOOH and were synthesized through a simple sol-gel route. From transmission electron microscopy. Fourier transform infrared, X-ray diffraction, and selected area electron diffraction analyses, manganese oxides prepared in this work are demonstrated to be a mixture consisting of MnOOH and single cry…
ZnO thin film field effect transistors with 1.5–20μm gate width were fabricated using either a metal gate [metal–semiconductor field effect transistor (MESFET)] or a metal–oxide–semiconductor (MOS) gate. In both cases we found that use of a thick (∼0.8–0.9μm) ZnO buffer was necessary on the sapphire or glass substrate…
Abstract Degradation can result from a variety of chemical, physical and mechanical mechanisms, most of them involving a reduction of molecular weight and thus a decrease in the mechanical performance of the degraded polymer. A clear understanding and control of these mechanisms is absolutely essential: without stabil…
The shape–memory effect is well documented in uranium–niobium alloys near the α″–γo metastable phase boundary. In situ neutron diffraction measurements during uniaxial loading indicate that U–14 at.% Nb (in the α″ monoclinic phase field) deforms by stress–induced twin reorientation. Alternatively, U–16 at.% Nb (initia…
The phase diagram with monoclinic phase near the morphotropic phase boundary (MPB) and the dielectric constant in a solid-solution system of perovskite-type ferroelectrics are discussed on the basis of the Landau–Devonshire-type free-energy function expressed in terms of polarization components. It is confirmed that t…
To analyze the mechanical dynamic characteristics of electromechanical system, we present a new and fast method using the reduced modeling technique for the levitated conductor. As of now, to solve this electromechanical system, the finite element method (FEM) or the boundary element method (BEM) employing the finite…
Abstract The first examples of 3d–4f heterometallic complexes containing picolinic acid ligands were synthesized and characterized. Three series of complexes were obtained by the reaction of presynthesized “metallo ligands” Cu(pic) 2 and Ln(ClO 4 ) 3 in 2:1, 3:1, and 4:1 mole ratios. Complexes 1 – 3 ( denoted as the f…