Materials Literature
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Moldable nonwoven fabrics for automotive applications make up a large market, but they are currently made from synthetic fibers that are not easily biodegraded. Incorpo rating kenaf fibers into automotive nonwovens may enhance their biodegradability, while imparting improved acoustical insulation and reducing vehicle…
Abstract Oxygen containing chemical groups on the carbon black surface can react with the carboxyl groups of XNBR, or epoxy groups of ENR, or chlorosulfonated groups of CSM, during high temperature molding of the rubber-filler mixtures. This leads to crosslinking of the rubber phase. The extent of crosslinking increas…
A detailed kinetic analysis has been performed of the thermoluminescence (TL) glow curve of high purity synthetic quartz. The kinetic parameters of the glow peak at 110 degrees C were evaluated for doses ranging from 0.1 Gy to 100 Gy using glow curve deconvolution (GCD), initial rise, variable heating ratc and phospho…
The interaction between low-k organosilicate glass (OSG) and photoresist removal is investigated. O2 plasma ashing and chemical wet stripper are commonly performed to remove photoresist (PR) in integrated circuit fabrication. However, O2 plasma or wet stripper will attack function groups and cause Si–OH group formatio…
We present theoretical modeling and experimental validation of both capacitive (dot) and inductive (hole) metallic crossed gratings in the mid-infrared (2-5 microm). The gratings are fabricated by use of interferometric lithography and modeled by use of rigorous coupled-wave analysis. Our experimental and numerical in…
Abstract Supercritical fluid extraction has been carried out on as‐synthesized Si‐MCM‐41 in a study to evaluate the efficiency of SFE in the recovery of the organic template cetyltrimethylammonium hydroxide (CTMAOH) from the pores of Si‐MCM‐41. Effects of different extraction parameters on the extraction efficiencies…
We have developed fast numerical solutions to the diffraction of light from periodic array structures that allow real-time regression fitting to optical data. In contrast to previous publications, the solutions we have developed are easily applied to focused beams with arbitrary angles of incidence on periodic structu…
Three percent sodium chloride (NaCl) solutions saturated with carbon dioxide (CO2) were used to study the corrosion inhibition of mild steel samples under turbulent flow conditions. The performance of cetyl trimethyl ammonium bromide (CTAB) was tested with three different concentrations (20, 60, and 100 ppm) and three…
Densification behavior of precursor‐derived Si‐C‐N ceramics by hot isostatic pressing (HIP) has been investigated to obtain dense ceramics derived from polymer precursor. An as‐pyrolyzed ceramic monolith, which had a porosity of about 17%, could be deformed up to a strain of 8% in preliminary uniaxial compression test…
We have studied the chemical potential shift in La 1 − x Sr x MnO 3 as a function of doped hole concentration by core-level X-ray photoemission. The shift is monotonous, which means that there is no electronic phase separation on a macroscopic scale, whereas it is consistent with the nanometer scale cluster formation…
In this paper we report on the metal-organic chemical vapour deposition of ZnO layers. We focus on heteroepitaxial growth on c-plane Al2O3 and the influence of the VI/II ratio during growth on the properties of the layers. The layer quality has been investigated by HRXRD, PL and reflectivity measurements. Under optimi…
Fiber‐coating debonding observed by transmission electron microscopy is suggested as the cause for an ∼60% reduction in strength after one cycle of 1600°C heat treatment in a carbon/silicon carbide (C/SiC) composite fabricated by polymer infiltration and pyrolysis with pure allylhydridopolycarbosilane polymer as the m…
ABSTRACT The microstructure of α‐gel and β‐crystalline emulsifiers and their effects on cake batter foam have been studied with polarized light microscopy, confocal laser scanning microscopy (CLSM) and image analysis, freeze‐etching, and transmission electron microscopy (TEM). The emulsifiers Colco and Aroplus, which…
Abstract The fracture behavior of 1‐mm‐thick syndiotactic polypropylene (sPP) sheets of various crystallinity (owing the various stereo‐ and regioregularity) was studied by the essential work of fracture (EWF) concept. The specific work of fracture parameters were determined on tensile‐loaded deeply double‐edge notche…
To demagnetize small-scale objects (dimensions less than 1 m) fabricated from ferromagnetic materials, it is standard practice to expose the object to a continuous AC applied magnetic field with a steadily decaying amplitude. For objects of dimensions greater than 10 m, there are problems of scale, and a stepwise proc…
The diffusive behavior of the cation and anion species of the PEO-type polymer electrolyte has been investigated using pulsed gradient spin-echo NMR to elucidate the carrier conduction mechanism of the polymer electrolyte. Compared with the random diffusive behavior generally observed in electrolyte solutions, the car…
Photon energy response of MTS-N (LiF:Mg,Ti) detectors (TLD Poland) and of MTS-N detectors sensitised with 200 Gy of 60Co gamma rays, followed by UV irradiation (sMTS-N), has been determined using X rays with narrow energy spectra, in the energy range from 20 to 300 keV. The over-response of LiF:Mg,Ti detectors for X r…
The atomic structure and chemical composition of a =3, [110]/{111} symmetric tilt grain boundary in an yttria-stabilized cubic zirconia bicrystal has been investigated by high-resolution transmission electron microscopy (HRTEM) and nanoprobe energy-dispersive X-ray spectroscopy. The experimental HRTEM images are compa…
The microstructure of a number of ethene/propene copolymers prepared with three representative C2-symmetric ansa-metallocene catalysts was investigated by means of high-field (150 MHz) 13C NMR. Thanks to the exceedingly high resolution of the spectra, an unprecedented experimental basis for the constitutional sequence…
Abstract The effects of ultrasonic irradiation on extrusion processing and crystallization behavior of polypropylene (PP) are examined. The results show that appropriate irradiation intensity can prominently decrease die pressure and apparent viscosity, increase output, reduce extrudate swell, and improve apparent qua…