Materials Literature
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Key parameters for controlling the layer‐by‐layer self‐assembly of ceramic particles were studied using a model system, which consisted of an Si substrate, 100 and 500 nm silica spheres, and a polycation/polyanion combination that provided binding between the substrate and silica particles, as well as between the sili…
Discostella stelligera and allied similar taxa are mainly identified by the presence of marginal fultoportulae located at the end of the striae, and not on the interstriae, as occurs in the genus Cyclotella, from which they have recently been removed. In this paper, valve morphology and ultrastructure of D. stelligera…
Ferromagnetic shape memory Ni–Mn–Ga has been shown to exhibit deformations of up to 9.5% when driven with quasistatic fields. This article is focused on the use of Ni–Mn–Ga as the active element in a dynamic transducer consisting of a solenoid and a low-reluctance, closed magnetic path. Despite the absence of a restor…
Carbon nanomaterials are at the verge of becoming an important material for various industrial applications. The main hurdle in the production of Carbon Nanomaterial (CNM) is the cost of the raw material. There are two components in producing the CNM, the precursors and the technique of the synthesis. It is almost cer…
In single-crystal La 0.7 Ba 0.3 MnO 3 , giant volume magnetostriction was observed for the first time to reach 2.54 × 10 −4 at room temperature and a still larger level of 4 × 10 −4 at the Curie point T C = 310 K in a magnetic field of 8.2 kOe. At the same temperatures and magnetic field, this effect is complemented b…
Scanning probe memories are now emerging as a means of achieving nanoscale resolution data storage. The use of microscopic conductive tips in contact with a phase-change material to record data as amorphous and crystalline marks is one such approach, making use of the large difference in electrical conductivity betwee…
We have investigated charging and flashover characteristics of a polymeric or glass insulator exposed to AC voltage in vacuum in order to develop compact and reliable high voltage VCBs (vacuum circuit breakers). This paper focuses on charging characteristics of a cylindrical model insulator. The charging of an insulat…
Abstract The comparative studies on the miscibility and phase behavior between the blends of linear and star‐shaped poly(2‐methyl‐2‐oxazoline) with poly(vinylidene fluoride) (PVDF) were carried out in this work. The linear poly(2‐methyl‐2‐oxazoline) was synthesized by the ring opening polymerization of 2‐methyl‐2‐oxaz…
Abstract Grounding on the evidence that thiophene or thiazole rings in donor‐acceptor chromophoric systems promote enhancement of charge transfer and nonlinear optical responses, in this work NLO properties have been investigated of organic polymers containing azoic chromophores based on dinitrothiophene or nitrothiaz…
Abstract Mg/Al layered double hydroxide–oleate and –stearate intercalation compounds were successfully synthesized by the reconstruction method under hydrothermal conditions from calcined hydrotalcite. The intercalation compounds were characterized by the high structural regularity as evidenced by the sharp and intens…
The techniques and mechanisms of the surface modification of polypropylene (PP) fiber used in concrete were discussed in details. The recent progress on the modification studies of PP used in concrete was reviewed.
The adhesion of polymer film of PMMA to different surfaces was measured using the shaft‐loaded blister test. The exposure of the films to saturated water vapor generally leads to a decrease in adhesive strength. The adhesion loss was directly related to the moisture accumulation at the polymer/substrate interface as m…
In the processing of carbon nanotube/polymer composites, the interactions between the nanotube and polymer matrix will occur at the molecular level. Understanding their interactions before curing is crucial for nanocomposites processing. In this study, molecular dynamics (MD) simulations were employed to reveal molecu…
Abstract Blends of polypropylene with silver particles of controlled morphology are performed to elaborate polymer‐metal conductive composites which can present a PTC effect to be used for a specific current limited function. The samples present quite low percolation threshold around 22% in volume of Ag and a resistiv…
This study uses the torsional split-Hopkinson bar to investigate the dynamic shear deformation and fracture behaviour of Ti–6Al–4V alloy under strain rates of 1800, 2300, and 2800 s −1 at temperatures ranging from −100 to 300 °C. It is found that both the strain rate and the temperature have a strong influence on the…
Copper interconnect electromigration (EM) was examined in various structures and three low- k materials ( k =2.65–3.6) using advanced back-end-of-line (BEOL) technology. Various structures for testing were designed to identify the EM failure modes, and extensive failure analysis was carried out to reveal failure in th…
SOFC-MGT hybrid power plants are a very attractive near term option, as they achieve efficiencies of over 60% even for small power outputs (200-400kW). The SOFC hybrid systems currently developed are fuelled with natural gas, which is reformed inside the same stack at about 800-900°C. However, the use of alternative f…
La johnsenite-(Ce), de composition ideale Na 12 (Ce,La,Sr,Ca,□) 3 Ca 6 Mn 3 Zr 3 W (Si 25 O 73 ) (CO 3 )(OH,Cl) 2 , est un nouveau membre du groupe de l'eudyalite, decouvert au mont Saint-Hilaire, Quebec; il s'agit de l'analogue tungstenifere de la zirsilite-(Ce). Elle se presente en cristaux squelettiques fortement c…
Nanocomposites of polyoxymethylene (POM) and organo-modified montmorillonite were obtained by melt mixing method and investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and mechanical testing, respectively. The XRD resul…
In this paper, the response of sandwich panels (Glass/Epoxy/PU Foam) to projectile impact in the velocity range of 30—100 m/s was studied. Three sets of sandwich plates (WRM/Epoxy/Foam, CSM/Epoxy/Foam, and WRM/CSM/Epoxy/Foam) were used. A piston-type gas gun setup was used to accelerate a cylindro-conical mild steel p…