Materials Literature
文献浏览
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。
Free Vibration Analysis of Cantilevered Laminated Trapezoidal Plates
Nonequilibrium Thermodynamics – A Tool for Applied Rheologists
GENERIC is reviewed not only as a new general framework for modeling nonequilibrium systems, but also as a new way of thinking about nonequilibrium dynamics. This unified framework of nonequilibrium thermodynamics is shown to be deeply rooted in the ample accumulated experience with nonequilibrium systems and, provide…
Evaluation of Slip Effects in the Capillary Flow of Foams
Foams have been prepared from water added with a surfactant (Sodium-Dodecyl-Sulfate, SDS) and a polymer (Poly-Ethylene-Oxide, PEO) at different concentrations. This work was devoted to a study of the flow properties of the foams. The pressure drops were measured during flow in capillary tubes (2.5, 3.5 and 4 mm) in la…
TABLE OF CONTENTS
The Role of Damage on the Tensile Behavior of a Knitted Fabric Composite - A Preliminary FE Study
Characterization of Octahedral Substitutions in Kaolinites Using Near Infrared Spectroscopy
Abstract Fourier transform infrared (FTIR) spectroscopy investigations in the near infrared (N1R) region of synthetic and natural kaolinites with various octahedral substitutions have been carried out in order to elucidate the relationships between the substituted cations and specific features of the NIR spectra. The…
An In Situ X‐Ray Absorption Spectroscopy Investigation of the Effect of Sn Additions to Carbon‐Supported Pt Electrocatalysts: Part I
Carbon‐supported platinum (Pt/C) with an adsorbed layer of underpotential deposited (upd) Sn is a much better catalyst for the methanol oxidation reaction (MOR) than a carbon‐supported platinum‐tin (PtSn/C) alloy. In situ X‐ray absorption (XAS) was used to determine the differences in the effects that the two methods…
Degradation of Starch–Poly(β-Hydroxybutyrate-Co-β-Hydroxyvalerate) Bioplastic in Tropical Coastal Waters
Extruded bioplastic was prepared from cornstarch or poly(beta-hydroxybutyrate-co-beta-hydroxyvalerate) (PHBV) or blends of cornstarch and PHBV. The blended formulations contained 30 or 50% starch in the presence or absence of polyethylene oxide (PEO), which enhances adherence of starch granules to PHBV. Degradation of…
The Material Basis for Reduced Mechanical Properties in oim Mice Bones
Osteogenesis imperfecta (OI), a heritable disease caused by molecular defects in type I collagen, is characterized by skeletal deformities and brittle bones. The heterozygous and homozygous oim mice (oim/+ and oim/oim) exhibit mild and severe OI phenotypes, respectively, serving as controlled animal models of this dis…
Mineralogical Interference on Kaolinite Crystallinity Index Measurements
Abstract This study examines the influence of minerals and amorphous phases associated with kaolin and kaolinitic rocks on kaolinite crystallinity indices (KCI) derived from X-ray diffraction (XRD) data in order to select the best index for systematic studies of commercial kaolins or geological sequences. For this pur…
Origin of the Lone Pair of α-PbO from Density Functional Theory Calculations
We present ab initio calculations using density functional theory (DFT) within the local density approximation (LDA) on PbO in the α-phase and the idealized CsCl structure. The electron densities clearly show that CsCl-structured PbO has a symmetric lead site while α-PbO shows asymmetry, forming what could be describe…
Statistical reconstruction of three-dimensional porous media from two-dimensional images
A method of modelling the three-dimensional microstructure of random isotropic two-phase materials is proposed. The information required to implement the technique can be obtained from two-dimensional images of the microstructure. The reconstructed models share two-point correlation and chord-distribution functions wi…
Elasticity, stability, and ideal strength ofβ-SiC in plane-wave-basedab initiocalculations
On the basis of the pseudopotential plane-wave method and the local-density-functional theory, this paper studies energetics, stress-strain relation, stability, and ideal strength of $\ensuremath{\beta}$-SiC under various loading modes, where uniform uniaxial extension and tension and biaxial proportional extension ar…
Theory of the hysteresis loop in ferromagnets
We consider three mechanisms of hysteresis phenomena in alternating magnetic field: the domain-wall motion in a random medium, the nucleation, and the retardation of magnetization due to slow (critical) fluctuations. We construct a quantitative theory for all these processes. The hysteresis is characterized by two dyn…
High‐Temperature Oxidation of Boron Nitride: I, Monolithic Boron Nitride
High‐temperature oxidation of monolithic boron nitride (BN) is examined at 900–1200°C. Hot‐pressed BN and both low‐ and high‐density chemically vapor‐deposited BN are studied. The oxidation product is B 2 O 3 ( l ) and the oxidation kinetics are sensitive to crystallographic orientation, porosity, and impurity levels.…
Synthesis and characterization of a novel and highly efficient light-emitting polymer
A polymer (TPD-PPV), incorporating both efficient light-emitting and hole transporting moieties has been synthesized. This polymer also possesses excellent film-forming property, good thermal stability, and high electrochemical reversibility and stability. The HOMO-LUMO energy levels were determined by cyclic voltamme…
Theory of optical conductivity in doped manganites
The frequency and temperature dependence of the optical conductivity of ferromagnetic manganites is explained within the framework of the bipolaron theory. As these materials are cooled below the Curie temperature, the colossal magnetoressitance (CMR) is accompanied by a massive transfer of the spectral weight of the…
Influence of Fe‐Rich Intermetallic Inclusions on Pit Initiation on Aluminum Alloys in Aerated NaCl
The role that Al 3 Fe intermetallic inclusions play during initiation of pitting corrosion on aluminum alloys was investigated in 0.6 M NaCl. In aerated solutions microscopic observations showed the growth of cavities in the host metal adjacent to inclusions. The rest potential of synthetic Al 3 Fe was measured in aer…
Synthesis and relaxometry of high-generation (G = 5, 7, 9, and 10) PAMAM dendrimer-DOTA-gadolinium chelates
A series of high-generation (G) ethylenediamine-core polyamidoamine (PAMAM) dendrimers corresponding to G = 5, 7, 9, and 10 were conjugated with the bifunctional chelate 2-(4-isothiocyanatobenzyl)- 1,4,7,10-tetraazacyclododecane-N,N',N",N"'-tetraacetate (p-SCN-Bz-DOTA). Gadolinium (III) ion was added to the macromolec…