Materials Literature
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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…
The available data for determining the thermochemical parameters for Si2F6 and SiF4 has been assembled. With this information, the thermochemical functions for Si2F6 and SiF4 have been calculated as ideal gases in the harmonic oscillator approximation. These results are presented in the format of the NIST–JANAF Thermo…
Thioanalogs of the nucleic-acid bases are known photosensitive probes and good traps of radiation energy. Radiation-induced sulfur-centered free radicals stabilized on the base thioanalogs molecules are of the cationic origin. Their electronic configuration is of the π type, unless an electron-donating group, like Cl−…
We have performed molecular dynamics simulations of bombardment of graphitic boron nitride (gBN) by energetic boron and nitrogen particles in order to examine the roles of ion bombardment in ion/plasma-assisted deposition of cubic boron nitride (cBN) thin films. We have found that the interaction of the energetic part…
Static recrystallization was studied in warm and hot deformed polycrystalline copper (99.99%). Samples were compressed to a strain of 0.25 at 573 K and 723 K at a strain rate of 2×10−1 s−1, quenched in water, and subsequently isothermally annealed at 673 K . Static recrystallization kinetics were found to be faster in…
I. APPAREL PRODUCTION. 1. Overview to Apparel Production. 2. Industrial Equipment: Orientation. 3. Basic Machine Skills. 4. Basic Production Skills. 5. Other Industrial Machines. II. BASIC OPERATIONS. 6. Seams, Types, Classifications, and Basic Plain Seams. 7. More Plain Seams. 8. Seam Finishes. 9. Self-finished Seams…
Experiments were carried out to investigate the magnetic properties of Sm-Fe-Co-Nb-Zr system nitriding compounds with TbCu7-type structure. Sm8(Fe0.95Co0.05)88.0Nb4.0-xZrx (X=0-4) alloy ribbons were prepared by the single roller rapid-quenching method, and the effects of alloy composition, and conditions of heat-treat…
We report a new sealant material for solid oxide fuel cells (SOFCs) using glass-ceramic. A glass-ceramic based on the CaO-Al2O3-SiO2 system was selected as a sealant because it can be easily molded to give a gastight seal and remains in a solid-like state under typical fuel cell operating conditions. Calcium alumina s…
Chiral sculptured thin films (STFs) have unidirectionally periodic electromagnetic constitutive properties and therefore exhibit the circular Bragg phenomenon. The time-domain Maxwell equations are solved using finite difference calculus in order to establish the spatiotemporal anatomy of the action of axially excited…