Materials Literature
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Secondary grain growth in thin Au films on SiO2 substrates is reported. Secondary grains have {111} texture which minimizes the surface energy. This indicates that surface energy anisotropy provides selectivity in the driving force for growth of secondary grains. In thin Au films on SiO2, surface-energy-driven seconda…
For a given temperature below the smectic-A (SmA)--chiral--smectic-C (${\mathrm{SmC}}^{\mathrm{*}}$) transition of DOBAMBC, polarization (P) and tilt-angle (theta) have been measured almost simultaneously with high resolution. The ratio P/theta stays fairly constant for ${\mathrm{T}}_{\mathrm{c}}$-T>2 K and shows a…
Dense tetragonal zirconia-yttria ceramics has been prepared with grain sizes between 0.1 and 0.5 µm. The fracture toughness and flexure strength at room temperature are independent on grain size and composition in the tetragonal phase region with YO1.5 larger than 5 at.%. The ageing rate of the mechanical properties i…
Methods for the solution of thermal-hydraulic problems in liquid-metal fast breeder reactors arising primarily from transient accident analysis are reviewed. Principal emphasis is given to the important phenomenological issues of sodium boiling and fuel motion. Descriptions of representative phenomenological and mathe…
The authors prepare double borates of scandium and cerium subgroup rare earths with the general formula RSc/sub 3/ (BO/sub 3/)/sub 4/ (R = Ce, Pr, Nd, Sm). It has been shown that these compounds have the structure of the carbonate mineral huntite. Their IR and luminescence spectra have been studied.
The 35 Cl NQR frequency and spin-lattice relaxation rate in the compounds A 2 PbCl 6 (A = Cs, Rb, NH 4 , K) have been investigated in the range 4.2 K to 500 K, and as a function of pressure at room temperature. NQR experiments conducted on (K: NH 4 ) 2 PbCl 6 mixed crystals have been used to complete the NQR-frequency…
The presence of agglomerates has an important influence on the densification behaviour of ceramic powders. The interdependence between the compact structure and its sintering behaviour will be discussed for TiO2 powders with different characteristics.
Abstract The photophysical properties of a series of chromium alkylamines with CrN 6 skeletons were studied in a mixture of dimethylsulfoxide (DMSO) and water (1:1 vv). For the analogous N‐deuterated compounds DMSO/D 2 O (1:1 vv) was used as the solvent Absorption spectra, phosphorescence quantum yields, and phosphor…
Using the Runge-Kutta and Newton-Raphson methods, the electric fileds on the bushing-type insulator surface covered partly by a corona-suppression semiconductor coating with a field-dependent resistivity have been computed for semiconductors having various resistivityfield ield (p-E) characteristics. The field distrib…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCadmium-113 nuclear magnetic resonance spectroscopic study of mixed-ligand tetranuclear clusters of the type [Cd4(EPh)x(E'R)10-x]2- and of the mixed-metal clusters [CdxZn4-x(SPh)10]2-Philip A. W. Dean and Jagadese J. VittalCite this: Inorg. Chem. 1986, 25, 4, 514–519Publicat…
As in many other electrotechnical fields, the research work and the early realizations in the cable field during the second half of the last century were the germ of most of the techniques developed in the 20th century. For more than 70 years, paper impregnated with oilresin compounds or simply with oil, prevailed as…
The objective of foam sizing, like other textile foam processing, is to reduce wet pickups and conserve energy during the drying operation. In foam sizing, a concentrated size composition is mechanically foamed at room temperature and is applied to the warp yarns by the Reed-Chatwood applicator. The main feature of th…
<div class="htmlview paragraph">Titanium alloys offer a unique combination of high strength-to-weight ratio, good corrosion resistance and favorable high temperature mechanical properties. While the high cost of titanium has severely restrained consideration of titanium usage in mass produced automobiles, there…
We report on an unusual variant in liquid crystal polymorphism where a nematic phase is created from a binary mixture of two compounds, neither one of which in its pure state exhibits the nematic phase. One of the compounds in its pure form exhibits only a smectic A phase which is stabilized by an extended alkyl chain…
The cylindrical or tubiliform glands of the spider Nephila clavipes have been studied and compared to the large ampullates on which we have previously reported. The three pairs of cylindrical or tubiliform glands secrete the fibroin for the organism's egg case. Their solubilized luminar contents migrate as a homogeneo…
Core spun yarns with a filament core and a cotton wrap were prepared and made into fabrics. The properties of these yarns and fabrics in comparison with all-cotton and intimate staple blend controls were investigated. This study included the dyeing of these fabrics and finishing for smooth drying and flame retardancy.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModeling growth rate dispersion in a batch sucrose crystallizerKris A. Berglund and Vincent G. MurphyCite this: Ind. Eng. Chem. Fundamen. 1986, 25, 1, 174–176Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissue 1 February 1…
The main properties of a newly developed impregnant ant for high voltage power capacitors are given. This new liquid, a mono dibenzyltoluene blend (M/DBT), has a very high degree of aromaticity. The results of many tests carried out both on model and large capacitors are reported. A screening test using a transparent…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature dependence of the reaction hydroperoxo (HO2) + hydroperoxo at low pressuresGerald A. Takacs and Carleton J. HowardCite this: J. Phys. Chem. 1986, 90, 4, 687–690Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissu…
Abstract Draw ratios have been measured for samples of polyethylene and trons ‐polyisoprene, crystallized at various temperatures and at various degrees of orientation. The values obtained range from unity, i. e., no drawing is observed, up to values of about 15X for materials crystallized in the oriented state and th…