Materials Literature
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An all-metal facility has been built to handle about 1000 Ci of tritium for studies of the tritium behavior in metals. First measurements of the pressure-composition-temperature relationship for the palladium-tritium system $\mathrm{Pd}{\mathrm{T}}_{x}$ are reported for the pressure range $0.1\ensuremath{\le}p\ensurem…
The infrared and Raman spectra for the room temperature, quasineutral, and the low temperature, quasi-ionic, phases of the mixed stack charge transfer complex tetrathiafulvalene–chloranil (TTF–CA) are reported. The analysis of the analogous data for a newly synthesized room temperature phase point to a dimerized segre…
The structural parameters of the graphitic carbon overlayer on a Ni(111) substrate has been determined by using surface extended-energy-loss fine-structure spectroscopy. We find that graphitic carbon is very similar to a graphite single-crystal plane, but slightly expanded (\ensuremath{\sim}2%), with C-${\mathrm{C}}_{…
Bond-orientational order in molecular-dynamics simulations of supercooled liquids and in models of metallic glasses is studied. Quadratic and third-order invariants formed from bond spherical harmonics allow quantitative measures of cluster symmetries in these systems. A state with short-range translational order, but…
The breakdown mechanism for an inhomogeneous field geometry in SF 6 depends on the pressure and can be divided into a streamer dominated and a leader dominated region. Based on leader propagation criteria a model is given that qualitatively describes the pressure dependence of the breakdown voltage in inhomogeneous ga…
Preview this article: Carbide Phase Identified in Platinum, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/pmr/27/3/pmr0027-0109-1.gif
Postirradiation examinations have been conducted as part of an extensive Babcock & Wilcox (B&W) program in reactor control materials performance characterization. These examinations of fixed burnable poison rods and control rods confirmed operational performance and extended the material behavior data base for irradia…
The wavefunction of the Fraunhofer diffraction from sector stars (i.e. radial gratings, spoke targets, Jewell's tests, Siemens' stars) is derived. Particular features of the diffraction patterns are explained by means of both the derived mathematical formulae and the general properties of Fraunhofer diffraction patter…
Abstract Der chemische Transport von GeO 2 mit H 2 nach Gl. (1) führt bei konstantem H 2 ‐Anfangsdruck (P°(H 2 ) = 1 atm) im Temperaturgradienten T 2 T 1 = 100 K zur Abscheidung eines feinkristallinen, farblosen Belages aus GeO 2 (hex.) bei T 1 , auf dem in Abhängigkeit von der mittleren Transporttemperatur T̄ nadel…
Abstract The polarization properties of the recombinative photoluminescence of free electrons excited to the conduction band of a cubic multivalley semiconductor by linearly and circularly polarized light are studied theoretically. The electron transitions from the valence band and impurities to the valleys of the con…
Polyamideimides (PAI) were prepared by the polycondensation reaction of the diacid chloride of N-(p-carboxy phenyl) trimellitimide and p, p′-di(amino phenyl) methane following three different techniques. The solution, thermal, chemical, and electrical properties of the polymer were studied. The polymer was found to be…
Abstract The description of electron density in solids by quantum theory and by x‐ray diffraction experiments should closely coincide. A formalism for describing the electronic structure of single crystals in terms of a density matrix is presented. Iterative equations for calculating the density matrix in a basis of B…
Orthorhombic α‐KFeSiO 4 ( a =0.5478, b =0.9192, c =0.8580 nm), hexagonal β‐KFeSiO 4 ( a =0.5309, c =0.8873 nm), and hexagonal γ‐KFeSiO 4 ( a =0.5319, c =0.8815 nm) were synthesized by devitrification of KFeSiO 4 glass. Powder X‐ray diffraction data are given for all three polymorphs. Alpha KFeSiO 4 , the high‐temperat…
Subsolidus equilibrium relations were reexamined in the SnO 2 ‐rich portion of the system GeO 2 ‐SnO 2 (60 to 98 mol% SnO 2 ). A limited solid solution based on SnO 2 was confirmed; 4mol% GeO 2 dissolved in SnO 2 at 1250 C, and glass was formed on quenching over the compositional range above 4mol% GeO 2 . Phase reluti…
Abstract not Available.
Abstract Three soil profiles containing two types of brittle horizons were extracted using citrate‐hicarbonate‐dithionite (CBD), a modified CBD, and NaOH procedures. The modified CBD method with a low soil‐solution ratio was the most effective extractant for Fe, Al, and, especially, Si. Increases in extractable Si cou…
Abstract The percentage contents of oil and protein in the seeds of Calotropis gigantea Linn. (Asclepiadaceae), Acacia caesia Willd., syn. A. intsia (Leguminosae) and Abelmoschus ficulneus Wight & Arm., syn. Hibiscus ficulneus Linn. (Malvaceae) were 30.8, 8.8 and 14.4, and 19.0, 11.7 and 20.0, respectively. The ma…
Above 755°C, compounds along the spinel join LiFe 5 O 8 ‐Li 4 Ti 5 O 12 form a complete solid solution and below that temperature a two‐phase region separates the ordered LiFe 5 O 8 and the disordered spinel phase. At 800° and 900°C, cubic LiFeO 2 ( ss ) and monoclinic Li z Ti0 3 ( ss ) exist on the monoxide join LiFe…
Abstract Novel poly(ether urethanes) were synthesized by homo‐ and random copolymerization of the m ‐ and p ‐hydroxyethoxy benzoyl azides. Polymerization proceeded by decomposition and rearrangement of the acid azide group to the isocyanate group, which immediately reacted intermolecularly with the hydroxyl group to p…
Abstract Individual marks are located adjacent to machine-cut ends on garbage bags and sandwich bags. Class marks that change direction or width or both are present on many brands. The cut ends of plastic bags can successfully be related to each other. Visits were made to plants that manufacture both types of bags to…