Materials Literature
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In Situ processing and microstructure of calcium dialuminate (CaAl4O7)-based porous materials have been investigated. Powder mixtures of CaCO3 and α-Al2O3 (1:2 in molar ratio, doped with 0.5mass% LiF), and CaCO3, α-Al2O3, and ZrO2 (2:2:1 with 0.5mass% LiF) were prepared by a high-energy ball-mill process. Reactions of…
Pyrolytic Carbon Deposition on Porous Cathode Tubes and Its Use as an Interlayer for Solid Oxide Fuel Cell Zirconia Electrolyte Fabrication , Basu, Rajendra N., Altin, Orhan, Mayo, Merrilea J., Randall, Clive A., Eser, Semih
An impedance model for the electrochemical dissolution of lithium in alkaline solutions is presented. The construction technique of the impedance function depends on calibration to steady-state properties, described in Part II of this series. The model, which is based on the point defect model for the growth and break…
The successful synthesis of 5,10,15,20-tetrakis[(R,R)-2,6-bis(1-phenylbutoxy)phenyl]porphyrin, with (R)-1-phenylbutoxy substituents on each of the eight ortho-positions, by a 2+2 approach viameso-[(R,R)-2,6-bis(1-phenylbutoxy)phenyl]dipyrromethane rather than a one-pot condensation of (R,R)-2,6-bis(1-phenylbutoxy)benz…
The effects of processing and molecular composition on the morphology and electrical conductivity of melt pressed polyaniline (PANI)/polyolefin blends have been investigated. In all systems, the morphology was found to consist of two distinct phases, a conducting network of PANI embedded within the thermoplastic host.…
Shungite rock material after fine grinding was investigated as a filler for polymeric composites. Shungite carbon structural and physico-chemical peculiarities predetermine shungite filler behaviour in polymeric matrixes. Specific interaction between the network of globules (the main structural units of shungite carbo…
Novel infrared microscopy has been developed to improve the liquid‐immersion method, which is a technique that has been developed by the authors to study the packing structures of powder particles in ceramic green bodies. This paper demonstrates the high potential of the novel technique by presenting clear structures…
The effect of rubberwood on curing characteristics and mechanical properties of epoxidized natural rubber (ENR) was investigated in the loading range of 0 to 50 phr. Results indicate that the scorch and cure times decrease with increasing rubberwood loading. Tensile modulus and hardness of the composites increase with…
PreviousNext No AccessSEG Technical Program Expanded Abstracts 2001Common focus point approach to complex near surface effectsAuthors: C. O. H. HindriksD. J. VerschuurC. O. H. HindriksDelft University of Technology and D. J. VerschuurDelft University of Technologyhttps://doi.org/10.1190/1.1816495 SectionsAboutPDF/ePub…
The preparations and crystal structures of (Ph4P)[Cr(phen)(ox)2](H2O) 1, [Co(phen)2(ox)](BF4) 2 and [Co(phen)2(ox)]I(H2O)2(EtOH)0.53 are described (phen⊕=⊕1,10-phenanthroline, ox⊕=⊕oxalate), and their crystal packing analysed in terms of the crystal supramolecular motifs and multiple aryl embraces. The crystal packing…
Lower operating voltage is one of the main requirements of future generation FRAM. In order to achieve this requirement, PLZT thin film capacitors must be scaled down with respect to thickness. This paper presents the ferroelectric performance of scaled PLZT thin films. The thickness of RF magnetron sputtered PLZT thi…
The sensitivity of mesh spacing on simulations of macrosegregation, particularly ‘freckles’, during vertical directional solidification of a superalloy in a rectangular mold was systematically analyzed to achieve accurate predictions in finite element calculations. It was observed that a coarser mesh spacing in the x-…
The phase transformations in a Ti–10 mass%Zr alloy during continuous cooling and isothermal holding have been investigated mainly by means of hot stage optical microscopy. During cooling from β phase at 100°C/s, α′ plates formed martensitically at temperatures around 180°C together with sharp and coarse surface relief…
Abstract Molecular dynamics simulations of unconstrained alkali halide clusters with 8, 64, 216, 512, 1000, 1728, 2744, 4096, 5832, and 8000 ions have been carried out using the Born–Mayer–Huggins potential. All the clusters exhibit first‐order melting and freezing transitions. The melting temperature increases with t…
The peel strength and peel angle of Cr/BPDA-PDA interfaces were measured using the T-peel test for Cu/Cr/BPDA-PDA structures. When the Cu/Cr metal film was thin, plastic bending of the metal film occurred during the T-peel test. With a thicker metal film, however, plastic bending of BPDA-PDA polyimide was observed. Th…
Analysis of the Pt 4f line asymmetry evidenced that the suppression of the hydrogenation activity of Pt/TiO2 in the SMSI state is caused by a decrease in the d-electron density at the Fermi level of platinum particles, while the net charge of the metal particles remains unaltered.
The vibrational spectra of the chemical vapor deposition (CVD) source molecules used for the deposition of (Ba,Sr)TiO 3 films were investigated by density functional theory (DFT) calculations. On the basis of the DFT calculations, we revised a part of the traditional assignments of the infrared spectral peaks. The spe…
The poly(Friedel–Crafts) reaction between benzene-1,2,4,5-tetracarboxylic dianhydride and diphenyl ether gave carboxylic acid functional polyarylates (PEKK-COOH) that were soluble in polar solvents such as NMP and DMF. The carboxylic acid functional polymers were thermally stable up to 400 °C. PEKK-COOHs in DMF or NMP…
The synthesis and X-ray structure of a C2 symmetric secochlorin 2, obtained by a photosensitized oxidative ring opening of a 2,3-dimethoxy porphyrin, is described.
Mg–Al–Si–Ca and Mg–Zn–Ca base alloys were rapidly solidified bymelt spinning at the cooling rate of about a million K/s. The melt-spun ribbons were aged in the range 100–400%C for 1 h. The effect of additional elements on microstructural change and precipitation hardening after heat treatment was investigated using TE…