Materials Literature
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The chemical surface modification of poly(tetrafluoroethylene) (PTFE) film was carried out in hydrazine gas photolyzed with ArF excimer laser irradiation. Hydrophilic surface appeared on PTFE film after the laser treatment. The surface was analyzed with a measurement of water contact angle, X-ray photoelectron spectro…
The effective tritium recovery system should be designed to recover tritium from DT reactor blanket sweep gas in a form easy to transfer to the main fuel cycle. The cryosorption method using a porous adsorbent at the temperature of liquid nitrogen is one of the candidate processes for extracting tritium from hydrogen-…
The opening roller system for fiber separation in an open end spinning process is known to cause considerable fiber breakage. We have investigated fiber breakage at different opening roller speeds and the relationship between breakage and the properties of friction spun yams made from cotton, polyester, viscose, and a…
The room-temperature single-crystal X-ray structure refinement of Nb 2 Zr X-2 O 2x+1 , x = 12, as an incommensurate compositely modulated structure is reported. It consists of two component substructures, referred to as the metal substructure (M), a M = 5.108 (1), b M =4.997(1), c M =5.278(1)A, and the oxygen substruc…
Production scale separation of tritium from other hydrogen isotopes at the Savannah River Site (SRS) in Aiken, SC, USA, has been accomplished by several methods. These methods include thermal diffusion (1957–1986), fractional absorption (1964–1968), and cryogenic distillation (1967–present). Most recently, the Thermal…
The full scale experimental assembly for study of the hydrogen isotope separation by cryogenic distillation is described. The cryogenic column has the diameter up to 300 mm, height of 5,5 m and place in the vacuum jacket diameter of 1200 mm and height of 6,5 m. There is a possibility to change the mass exchange sectio…
The results of experimental studies and thermodynamic calculations of melting diagrams of the 3-d transition metal-carbon systems are discussed in this paper. The authors present their theoretical and experimental results which complement the earlier available data. The Fe-Ni-C, Fe-Co-C, and Mn-Ni-C systems are shown…
Abstract The thermal conductivity and thermal expansivity of a thermotropic liquid crystalline copolyesteramide with draw ratio λ from 1.3 to 15 have been measured parallel and perpendicular to the draw direction from 120 to 430 K. The sharp rise in the axial thermal conductivity K par; and the drastic drop in the axi…
The kinetics of the sorption of molecular hydrogen by ZrCo and Zi0.8Ti0.3Mn1.9 was investigated as function of temperature at several constant pressures of hydrogen. A comparison between the isothermal hydrogen sorption rates by ZrCo, Zr0.8Ti0.3Mn1.9 and LaNi4.7A10.3 is given and reaction mechanisms are discussed. Fro…
The dynamics of the phase of the molecular tilt in the helical ferroelectric liquid crystalline Sm-${\mathit{C}}^{\mathrm{*}}$ phase is studied within the Landau model. We show that a static electric field applied parallel to smectic layers induces a gap in the excitation spectrum of the phase of the tilt at the edge…
Differential anomalous x-ray scattering measurements were made on a well-annealed and a photodarkened amorphous ${\mathrm{As}}_{2}$${\mathrm{S}}_{3}$ film of 4 \ensuremath{\mu}m in thickness as well as on a well-annealed 30 \ensuremath{\mu}m sample, all of which were supported on Si (100) wafers. The thicker sample wa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of iron oxidation at high temperaturesJohn C. Slattery, Kuang-Yao Peng, A. M. Gadalla, and N. GadallaCite this: Ind. Eng. Chem. Res. 1995, 34, 10, 3405–3410Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published inissue 1 Octo…
Air or nitrogen ingress accident scenarios into JET tritium storage containers, filled with uranium or intermetallic compound (IMC) hydrides, are discussed based on the experimentally determined kinetics of the reaction of these hydrides with air, O2 and N2. Reaction of uranium with air can occur at room temperature.…
An investigation was conducted to study the repassivation temperature of a highly alloyed austenitic (UNS S31254) and of a highly alloyed duplex (UNS S32750) stainless steel (SS). When initiated at a high temperature, repassivation occurred at a temperature level significantly lower than normally associated with initi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA mechanistic study of polybenzoxazole formation with model compoundsYing-Hung So, Jerry P. Heeschen, and Cheryl L. MurlickCite this: Macromolecules 1995, 28, 21, 7289–7290Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published inissue…
The distribution of divalent iron and nickel over two metal sites of differing coordination geometry in NiFe 2 (PO 4 ) 2 , sarcopside, has been investigated by resonant X-ray and time-of-flight neutron powder diffraction. To assess the reproducibility of the X-ray technique, data have been collected from instruments X…
<div class="htmlview paragraph">A novel approach was proposed and investigated to reduce unburned hydrocarbon emissions from spark-ignition engines using in-cylinder catalysts. The unburned hydrocarbons in spark-ignition engines arise primarily from sources near the combustion chamber walls, such as flame quench…
During the growth of barrier-type anodic films on aluminium in aqueous electrolytes, electrolyte species, derived from electrolyte anions, are usually incorporated into an essentially alumina film. Here, use has been made of this phenomenon to investigate the behaviour of anions near the film surface that leads to app…
The Peierls-Nabarro model was developed originally to describe core spreading on the slip plane of a dislocation. Screw dislocations have more than one slip plane and are expected to be dissociated into a non-planar fashion conformable to the symmetry about the screw axis. In this work, the Peierls-Nabarro model is ge…
The nature and performance of our patented catalysts, with platinum on carbon and polytetrafluorethylene [ Pt/C/PTFE ] and platinum on styrenedivynilbenzene and polystyrene [Pt/STB/PS], used in a water - hydrogen isotope exchange process are presented.The behaviour of the two catalysts in tritiated water was tested by…