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。
Metal‐2,5‐diaminobenzenesulfonic acid (DABSA)-modified polyaniline Schottky junctions in which modified polyaniline is obtained from electrochemical copolymerization of aniline with DABSA were investigated. The typical dark current density vs. applied voltage characteristics for several Schottky junctions are reported…
A one-dimensionally periodic pentagonal quasicrystal with a superstructure has been found in the Al-Co-Ni system in a sample quenched from 1160oC at the composition Al71.5Co25.5Ni3. Its electron diffraction patterns are characterized by a fivefold rotation axis as a unique symmetry element as well as superstructure re…
EXAFS measurements in the corrosion deposits were performed on Bell Labs-UIUC beamline X16C at the NSLS at Brookhaven National Laboratory in grazing incidence fluorescence mode at room temperature. EXAFS in the reference Cu and Pb metal foils, malachite, cerussite and hydrocerussite were measured in transmission. Sagi…
Biofilms form ubiquitous organic coatings on mineral surfaces in soil and aquatic environments.
The experimental phase diagrams of several chiral systems are compared with a theoretical diagram based on the chiral Chen-Lubensky model, which predicts at least two kinds of twist-grain-boundary phase, TGBA and TGBC. Also shown for comparison are typical nonchiral phase diagrams that exhibit a nematic-smectic A-smec…
A model is proposed for the kinetics of spinodal decomposition at high diffusion rates described by a hyperbolic equation. The formation of new phases is described using a zero-radius nonlinear potential model. It is shown that a regular distribution in space of the phases during spinodal decomposition is initiated by…
The room-temperature photoluminescence emission and excitation spectra of Si 3 N 4 films implanted with Ge + and Ar + ions were investigated as a function of the ion dose and temperature of subsequent annealing. It was established that the implantation of bond-forming Ge atoms during annealing right up to temperature…
From general arguments, it is shown that a magnetic Kronig-Penney model based on the thermodynamics of an Ising model can be used for describing the colossal magnetoresistance (CMR) phenomenon. The model considers a tunnelinglike transmission process of hopping electrons through a dynamic lattice characterized by evol…
Carboxymethylcellulose (CMC) was prepared in a completely heterogeneous procedure in an isopropanol/water slurry and the influence of the reaction conditions on the pattern of functionalization within the anhydroglucose repeating unit as well as due to the formation of the four main repeating units (i. e. unfunctional…
Several ductile Iron samples with various kinds of matrix were subjected to fracture toughness testing in a condition that specimens were in contact with water at the time of testing.A considerable reduction in fracture toughness caused by contact with water was found in the case of the samples with an austempered mat…
Abstract Three steps in complex chemorheological studies are necessary for complete rheological characterization of filled rubbers during cross-linking reaction. They include: (i) kinetic studies of cross-linking reaction, (ii) rheological studies of green rubber compounds, and (iii) correlation between the rheologica…
Anisotropic strain gradient elasticity theory is applied to the solution of a mode III crack in a functionally graded material (FGM). The theory includes both volumetric and surface energy terms, and a particular form of the moduli variation. The crack boundary value problem is solved by means of Fourier transform and…
symmetry are calculated by restricted (RHF) and unrestricted (UHF) Hartree-Fock theory; Møller-Plesset perturbation theory (MPn); coupled-cluster theory with singles, doubles, and a perturbational treatment for connected triples [CCSD(T)]; Brueckner doubles with a perturbational treatment for connected triples [BD(T)]…
Abstract Backscattered electron spectroscopy offers detailed information for multilayer and subsurface‐layer materials with distinct Z contrast: It can be used for the validation of Monte Carlo calculations, to obtain depth selective electron microtomographic images, and to determine the thickness of ultra thin films…
Topical courses devoted to specific techniques or subjects, such as x-ray techniques or clay mineralogy, are often difficult to fit into an undergraduate geology curriculum. These courses, if designed appropriately, can introduce students to research techniques and can provide them with a way to apply the principles t…
Carbon atoms condense to many useful nanostructures under suitable environmental conditions in presence of some specific catalysts. Fullerene molecules and carbon nanotubes are zero and one dimensional shells made out of monatomic layer thin graphene sheet. Due to curvature involved in otherwise graphite lattices, mix…
A Preisach based magnetization model is presented to work specifically on highly magnetostrictive materials. The model accounts for the additional anisotropy introduced when a prestress is used to activate the high strain, by using a bimodal structure. The necessity of strain feedback to deal with the magneto-mechanic…
It is shown that the small-angle scattering of X-rays or neutrons by dislocations within a deformed metal, which are partially ordered into wall-like structures, is characterized by several factors. Principally these are associated with: (i) a single dislocation or dipole; (ii) the dislocation configuration in the pla…
The standard Gibbs energies of formation of IrO 2 , CaIrO 3 , Ca 2 IrO 4 and Ca 4 IrO 6 have been measured in the temperature range 940–1350 K using solid‐state cells with ( Y 2 O 3 ) ZrO 2 as the electrolyte and pure oxygen gas at a pressure of 0.1 MPa as the reference electrode. For the design of appropriate working…
With the rapid development of high-frequency magnetic components, it is important to know the distributions of the electrical and magnetic fields in the ferrimagnetic cores. In this paper, an improved model for analyzing the distributions of electrical and magnetic fields in a toroidal core is given. It supplies the b…