Materials Literature
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Abstract Thermische Analysen und Röntgenstrukturanalysen zeigen, daß es im Dreistoffsystem Thallium–Indium–Schwefel mit Tl 2 SIn 2 S 3 und TlSInS zwei binäre Schnitte gibt, auf denen ternäre Verbindungen mit eigenständigen Kristallstrukturen liegen. Dies sind die Verbindungen TlIn 5 S 8 , TlIn 3 S 5 , TlInS 2 und Tl…
Abstract Die Darstellung von Rb 2 Ni 3 Se 4 gelang durch Umsetzung von Rubidiumcarbonat, Nickel und Selen in einem Wasserstoffstrom bei 850°C. Die goldfarbig glänzende Verbindung kristallisiert im K 2 Pd 3 S 4 ‐Typ; a = 10,555(3) Å, b = 27,588(6) Å, c = 6,031(6) Å, Z = 8, Fddd (Nr. 70). Die Struktur läßt sich als Stap…
Abstract Extensive experimental investigations into the effect of magnesium and sulfate ionic impurities on cooling crystallization of KCl were carried out in a steady‐state Mixed Suspension Mixed Product Removal (MSMPR) crystallizer. The impurities selected for investigation were chosen from those naturally associate…
Small angle X-ray diffraction data from aligned samples of three bicyclohexane compounds in smectic B and nematic phase have been analysed to determine the bond orientational order (BOO), orientational order parameters (OOP), transtational order parameter (TOP), layer thickness (in smectic B phase), apparent molecular…
The flow of an electrically conducting fluid in an open channel in the presence of a strong magnetic field of oblique incidence to both the channel walls and the force of gravity is explored. This type of flow has possible applications to the protection of high heat flux surfaces in magnetic confinement fusion reactor…
Iron spectra were measured with the Physical Electronics Model 5400 x-ray photoelectron spectrometer using unmonochromated Mg Kα x-rays at three pass energy settings corresponding to analyzer energy resolutions of 1.34, 0.54, and 0.13 eV. The specimen is a high purity 0.25 mm thick iron foil that was obtained from Joh…
Full-thickness, circular, cutaneous wounds (4 cm diameter) were created on metacarpi and metatarsi of 5 horses. On day 6, all 4 wounds on each horse received a stored autogenous split-thickness sheet graft. Grafts were obtained from the horse's ventrolateral thorax with a pneumatic dermatome at the time the cutaneous…
Abstract Single crystals of BaCuTeO 3 TeO 4 have been prepared by crystallisation from melts. X-ray investigations lead to orthorhombic symmetry, space group C 16 2v -Ama2, a = 5.4869(8), b = 15.412(1), c = 7.2066(4) Å , Z = 4. This compound represents a new structure type, containing BaO 10 , CuO 5 , TeO 6 and TeO 4…
XPS spectra of Pt black in the as received state showed O and C impurities along with Pt. An in situ treatment by O2 and H2 increased Pt intensity and removed a part of oxygen and carbon impurities. The quasihomogeneous model was used for quantitative evaluation applying atomic sensitivity factors published in the lit…
A molybdenum σ= 5 [001](310) symmetrical tilt boundary has been examined following carburization heat treatments. The resulting structure was studied by 400 kV high-resolution electron microscopy and compared with the structure of the pure boundary. It is shown that two different morphologies and carbide structures ex…
Research efforts conducted in the Chemistry Division of the Oak Ridge National Laboratory on the preparation of polymeric precursors to boron nitride are reviewed. They evolved from the preparation of powders, which contained significant amounts of residual carbon, derived from the pyrolysis of aminoborane polymers to…
The surface emittance of fully oxidized copper is experimentally determined as functions of wavelength between 2-10 /tin, the direction between the normal and grazing angles, and the temperature between 400-700°C. Clean copper surfaces, heated and exposed to air, begin to oxidize immediately. After a sufficient heatin…
Abstract Aluminoxane catalysts and anionic initiators can polymerize 3‐butyrolactone, 3‐BL, to high molecular weight stereoregular polymers. With the racemic monomer, [R,S]‐3‐BL, anionic polymerization with alkali metal complexes can form syndiotactic polymers and aluminoxane catalysts can form either highly isotactic…
The orientation of an object is determined by rotation angle and rotation axis. In the case of randomly oriented nonsymmetric objects, the distribution of rotation axes is uniform. But symmetry destroys uniformity. An orientation of a symmetric object can be represented by different but symmetrically equivalent sets o…
Germanosilicate glasses exhibit a significant photosensitive response which has been linked to the presence of oxygen-deficient germanium point defects in the glass structure. Based on this correlation, a process which produces highly photosensitive thin films without the use of hydrogen exposures, has been developed.…
Abstract Polyoxazolidone composites were prepared from polymeric isocyanate (PAPI 901) and epoxides (Epon 828 and DEN 431) in the presence of an oxazolidone‐forming catalyst, triphenylantimony iodide. The effects of isocyanate to epoxide equivalent ratio, type of epoxide, and amount of fiberglass reinforcement on the…
The paper reports and discusses the results of an experimental and numerical activity, aimed to the characterization of the influence of hydrogen on the mechanical properties of a few high chromium martensitic steels which are candidates for fusion reactor and chemical applications. Experiments were conducted with the…
The effects of oxygen partial pressure on Y123 single-crystal growth, morphology and properties were investigated. YBCO (Y123) single crystals were fabricated using the crystal pulling method under 1 atm oxygen pressure. Compared with crystals fabricated under air atmosphere, it was found that this high oxygen partial…
By the action of a small amount of an acid, 2-phenyl-2-(2-tosyloxyethyl)-1,3-dioxolane decomposed to give p-toluenesulfonic acid resulting in the proliferation of acid molecules. The decomposition manner was stepwise in solution state and autocatalytic in polymer film. The sensitivity of an acid-catalyzed photoimaging…
Two devices for quantifying the basis weight and fiber orientation distribution func tion in nonwoven webs have been developed and studied. The basis weight device measures the attenuation of a light beam by the fabric. The particular device is im plemented, calibrated, and tested at speeds up to 400 m/min. By statist…