Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The wavelengths of the L series of argon, krypton and xenon, the K series of argon, and the M series of curium were measured by means of wavelength dispersive X-ray microanalysis. The specimens for the investigations were TiC layers which had been HF sputtered under reduced argon pressure by the PVD method, k…
Current UK strategy for decommissioning stainless steel plant used for tritium containment centres on heating/melting the bulk metal to effect release of dissolved gases. However, hydrogen isotope containment vessels used for approximately 20 years with mercury pumps and exposed to air and water impurities, exhibit tr…
The recent results of the Isotope Separation System (ISS) operations at the Tritium Systems Test Assembly (TSTA) with 100 g of tritium indicate that the system generally satisfies design goals, while system stability problems remain to be solved. We configured the ISS system for the three column mode, which is one of…
Abstract A method is developed for determining the environmental stress cracking resistance (ESCR) of blow molded poly(ethylene terephthalate) (PET) containers. By this method, the internal chamber of a container is presurized in 68.9 kPa (10 psi) increments while the outside of the base is being exposed to an environ…
The force of adhesion of an aqueous phase (pH 9.6 borate) to steel in the presence of a xylene solution of hydroxy-terminated polybutadiene increases below the potential of zero charge (-550 mV vs Ag/AgCl). Incorporation of a high molecular weight quaternary ammonium cation in the xylene phase inhibits displacement of…
Abstract Degradable copolymers which respond to external stimuli such as pH, ionic strength, and temperature were successfully prepared by direct polycondensation of L ‐lactic acid (LA), D , L ‐mandelic acid (MA), and 3‐( p ‐hydroxyphenyl)propionic acid (HPPA) without the use of a catalyst at 200°C by bubbling nitroge…
Desilication product (DSP) formed in the Bayer process is difficult to study using electron microscopy because it is masked by iron oxide particles. Differences in the rate of DSP formation under plant and laboratory conditions, which may be due to particle size and hence surface area, are difficult to resolve. Iron o…
X-ray photoelectron spectroscopy was used to analyze a 1 cm2, 0.13 mm thick coupon of polytetrafluoroethylene (PTFE). The material was examined as received from the manufacturer following a cleaning with isopropyl alcohol and trichlorotrifluoroethane. The PTFE coupon was examined with a Hewlett-Packard 5950B ESCA syst…
The crystal structure of 1,4-dibromocubane has been determined by X-ray diffraction. The crystal is monoclinic, P2 1 /n, a = 6.878(1), b = 6.960(7), c = 8.793(2) Å, β = 113.08(2)°, Z = 2, R = 0.055. The C—Br bond length, at 1.926 Å, is shorter than usual and the carbon framework is probably distorted by longer bonds a…
t Introduction Silk consists mainly of fibroin and sericin along with very small amounts of waxy substances, mineral salts and colouring matter. The sericin is also referred to as silk gum and its removal is, therefore, called degumming. The sericin is removed by hydrolytically breaking it into smaller water-soluble f…
The authors discuss stator winding deterioration mechanisms and their consequences. Inspection and test procedures which will detect these mechanisms, as well as programs to arrest them, are also discussed. The analysis is broken down into sections on the slot region of the stator winding and on the end winding region…
It is noted that the moving model and the product model have different variations in the height of minor loops and thus a means of differentiating between the models. Measurements show that, for particulate magnetic recording media, the moving model yields more realistic results and that previous reversible magnetizat…
We have studied a process for filling narrow spaces between adjacent metallic conductors (gaps). The process consists of cycles of deposition of by plasma‐enhanced chemical vapor deposition (PECVD) and sputter etching in Ar. For a fixed process and metal thickness, as the gaps decrease in size, i.e. , as the aspect ra…
To help resolve unknowns regarding consequences of air-ingress accidents in uranium beds, a series of experiments was conducted at Ontario Hydro Research Division with the participation of Princeton Plasma Physics Laboratory and the Idaho National Engineering Laboratory. These experiments involved exposure of uranium…
After a discussion of the thermochemical values of the Si–H–Cl–N system which occur in the literature, CVD phase diagrams are presented which include contours of constant deposition efficiency. The temperature range considered is from 800 to 2600 K. A number of chlorinated silanes as well as silane can be used as a si…
A three-dimensional linear analysis of transient patterns occuring during the splay Freedericksz transition is presented including contributions relevant for the electrically driven case. The most rapidly growing modes have a wave vector predominantly along the initial directore alignment. The onset of the pattern for…
Abstract Innerhalb der triklinen Elementarzelle, Raumgruppe P 1 , mit den Gitterkonstanten a = 5,2794(1) Å, b = 9,9279(1) Å, c = 11,3376(2) Å, α = 71,004(4)° und β = 74,601(4)° befinden sich zwei Formeleinheiten. Das den Strukturaufbau charakterisierende dreidimensionale Netzwerk resultiert aus sp 3 ‐hybridisierten Di…
Zirconium cobalt (ZrCo) is being evaluated as an alternative to uranium for tritium storage. The pumping speed and pressure-composition-temperature isotherm profiles for the ZrCo hydrogen and tritium systems were measured to determine isotopic differences and the effect of He-3 induced aging on ZrCo performance. Hydro…
A formulation is presented for the inclusion of segmentation effects in a three-dimensional eddy current model of large laminated iron cores. The model has been developed for the study of eddy currents induced in the end laminations of turbogenerator stator cores. It includes magnetic nonlinearity and represents the o…
Spanning nearly 5000 years of textile history, this book covers the field from the first practical and decorative use of fabrics to the introduction of modern synthetic materials. Organized in an A to Z format, the work provides information on fabric, fabrication methods, machine processes (felting, weaving) and more.…