Materials Literature
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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…
Optical reorientational nonli neari ty in tw isted nematic li quid crystallin e planar w aveguide is analyzed theoreticall y. It is shown that optical nonlinearity for guided mo des in analyzed w aveguides can be appro ximated by saturation nonlin earity . Predicted nonlinear ity is large enough to observe eects like…
Characteristics of high burnup UO2 fuel such as threshold burnup for the formation of high burnup microstructure (rim), rim average burnup and rim width were estimated and then the thermal conductivity degradation due to the porous rim region was investigated. The threshold burnup for rim formation was estimated as a…
The crystallization kinetics of poly(butylene terephthalate) (PBT), poly(ethylene terephthalate) (PET), and their copolymers poly(1,4-butylene-co-ethylene terephthalate) (PBET) containing 70/30, 65/35 and 60/40 molar ratios of 1,4-butanediol/ethylene glycol were investigated using differential scanning calorimetry (DS…
Recent progress in R&D of SiC fibers and reinforced SiC matrix (SiC/SiC) composites in Japan, especially focusing on the activities of CREST-ACE program, is presented. Firstly, the present status of high performance SiC fiber development, such as Hi-Nicalon Type-S and Tyrano-SA, is provided. The high performance SiC m…
The influence of comonomer content and type on the dynamic-mechanical behavior of some ethylene/α-olefin (1-hexene, 1-octene, 1-decene, 1-octadecene and 4-methyl-1-pentene) copolymers was studied. It was observed that the comonomer content has great influence on α- and β-transitions, but almost no influence on γ-trans…
Silica-supported cobalt catalyst was studied for hydroformylation of 1-hexene. The influence of pore size of the silica support was investigated. It was found that cobalt catalyst supported on silica with appropriate pore size, about 6-10 nm, was active for the reaction with very high selectivity to oxygenates. The sm…
Hydrogen behavior during stress-corrosion cracking in an AZ31 magnesium alloy was studied by using hydrogen microprint technique (HMT), which is a method to visualize points of hydrogen emission from metals. Tensile test specimens were prepared from an extruded bar of the AZ31 magnesium alloy and deformed in tension a…