Materials Literature
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Multiwalled carbon nanotubes (MWNTs) were homogeneously dispersed into aluminum (Al) powder by the elastomer precursor method. MWNT/Al composites were prepared by extrusion molding of the precursor powder and cut into thin plates. Each composite plate was split parallel or perpendicular to the extrusion direction, and…
Abstract Thermodur 2367 Supra is an electro slag remelted (ESR) hot work die steel developed for applications where high temperature properties (tensile strength and thermal conductivity) are required to resist thermal fatigue and tempering. This datasheet provides information on composition, physical properties, hard…
The mechanical and thermal properties of the pseudostem of Pupunha (Bactris gasipaes) palm were evaluated in order to identify possible engineering applications for this material. The microstructure of the material was analyzed by digital optical microscopy, and microstructural features were quantified. Also, the wear…
This work is concerned with the study of Au specimens produced by gold deposition on nanosized mixed oxides (alumina, ceria, zirconia) prepared by the sol-gel method using organometallic precursors. According to X-ray absorption near edge structure, extended X-ray absorption fine structure, transmission electron micro…
In the present study, regenerated silk fibroin (RSF) formic acid solution and polyvinyl alcohol (PVA) aqueous solution were blended to form RSF/PVA solution. RSF formic acid solution was well compatible with PVA aqueous solution at certain RSF/PVA blending ratios. The blended solution could be electrospun to nanofiber…
The phonon properties of spatially confined nanofilms under the preexisting stress fields are investigated theoretically by accounting for the confinement effects and acoustoelastic effects. Due to the spatial confinement in low-dimensional structures, the phonon dispersion relations, phonon group velocities as well a…
Aimed at structure retrofit of sprocket shaft, combining with the practical working conditions, theoretical calculation, finite element method (FEM) Analysis and model test are applied in research. The results show, numerical value of traditional mechanical algorithm is relative small, FEM can express the influence of…
TLC with a stationary-phase gradient has been used for purification and quantitative analysis of taxol in the needles and stems of female and male specimens of Taxus baccata L. harvested during the vegetative period of the plant. Parts of different TLC plates were connected by use of a Migas device. Separated taxol-co…
Abstract Silica surface was modified with four aliphatic acyclic amines differing in the number of nitrogen donor atoms and the chain length. The structures of the four systems were confirmed by Fourier transform infrared spectroscopy. Three of the systems studied were found to show excellent scavenging of copper ions…
Volterra analysis of the wide-band diode bridge track and hold amplifier (THA) is proposed based on a high frequency Schottky diode model. Approximate expressions for the third-order harmonic distortion and the third-order intermodulation distortion are derived respectively. Simulations based on a commercial available…
Abstract Carlhintzeite, Ca2AlF7·H2O, has been found at the Gigante pegmatite, Punilla Department, Córdoba Province, Argentina. It occurs as colourless prismatic crystals up to 0.8 mm long, ubiquitously twinned on {001}. Electron microprobe analyses provided the empirical formula Ca1.98Al1.02F6.24(OH)0.76·H1.62O. A cry…
Abstract The lubrication mechanisms in ultrathin solid gold films confined between two rough nickel surfaces have been investigated employing classical molecular dynamics with a second moment tight-binding potential. Three types of nickel surfaces are considered: Ni(111), Ni(001) single- and an Ni(001) –(111) bicrysta…
Micro-crystals of cuprous oxide with different morphologies were prepared by a hydrothermal process with copper sulfate and sodium lactate as precursors. Morphology of cuprous oxide was simply controlled by adjusting solution pH values or addition of different amounts of organic solvent. Structural properties of all t…
The accumulation and decay characteristics of exoelectron sources at a MgO protective layer surface in alternating-current plasma display panels (AC-PDPs) were investigated. The positively charged MgO surface provides a larger number of exoelectrons than the negatively charged surface, indicating that electrons trappe…
The photo-deactivation mechanism of the MNc(OBu)8 (M = Co, Ni, Cu) series of complexes is reviewed, with special emphasis on the role played by the central metal. Ultra-fast transient absorption experiments and Density Functional Theory and time-dependent Density Functional Theory calculations consistently show that t…
Three-dimensional simulations of solid-target electron-transport experiments have been performed, using the hybrid-PIC code LSP. The experimentally observed fast-electron divergence half-angle of 16° in the target was reproduced assuming an initial divergence half-angle of ∼56°, close to the value expected from the si…
The temperature dependences of the heat capacity and optical transmission spectra of quasi-one-dimensional Haldane magnets (Y1 − x Nd x )2BaNiO5 (x = 1, 0.75, 0.50, 0.25) have been studied. All the compounds studied undergoes antiferromagnetic ordering. In the ordered state, the internal magnetic field produces splitt…
Structure and properties of segmented polyurethane-ureas with mixed nonpolar and polar soft segments were studied. Advantages of elastomers based on mixtures of oligobutadiene and oligoether diisocyanates in providing high strength properties combined with frost resistance are demonstrated.
The composite polymer layers consisting of polyaniline (PANI) and poly( o -phenylenediamine) (poly( o -PDA)) were electrodeposited on a platinum electrode by simultaneous electrochemical oxidation of corresponding monomers from aquaeous hydrochloric solutions. The growth of PANI and poly( o -PDA) occurs separately res…
Cobalt/copper nonlocal spin valve devices with AlOx barriers are fabricated for the purpose of spin-transfer with a pure spin current. The submicron planar device consists of a Co spin injector (F1), a Co spin detector (F2), and a Cu channel. The F2 Co electrode is only 2.5 nm thick, but sizable nonlocal spin signals…