Materials Literature
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Lithium or any lithium alloy like the lithium lead alloy Pb-17Li is an attractive breeder material used in blankets of fusion power reactors because it allows the breeding of tritium and, in the case of self-cooled blankets, the transfer of the heat generated within the liquid metal and the walls of the cooling ducts…
Abstract Poly(ethylene terephthalate) (PET) and poly (butylene terephthalate) have been modified by diamide units (0.1–1 mol%) in an extrusion process and the crystallization behavior studied. The diamides used were: for PET, T2T‐dimethyl (N, N′‐bis( p ‐carbomethoxybenzoyl)ethanediamine) and for PBT, T4T‐dimethyl (N,…
Crystal structures of(Ba1-xLax)2In2O5+x (x=0.00, 0.20, 0.30, 0.40, 0.50) were analyzed by EXAFS and the powder X-ray Rietveld method. A Fourier transform of In K-edge EXAFS data from (Ba1-xLax)2In2O5+x showed a peak between 1.2 and 2.0 A attributed to the nearest oxide ions around In3+ cation. The peak as back-Fourier…
Abstract The synthesis of a new cylindrical macrotricyclic ligand (L) based upon two 1,4,7,13-tetramethyl-1,4,7,10,13,16-hexaazacyclooctadecane rings connected via two azobenzene pillars is described. The ligands displays photoelastic properties: light absorption at 366 nm produces trans→cis isomerization of the azobe…
In situ Young's modulus measurements and synchrotron radiation‐energy dispersive diffraction have been used to study changes in high‐alumina castables subjected to heat treatment from room temperature to 1600°C. Particular attention was paid to the hydrate “conversion” process and the effects of high temperature.
We have studied the temperature variations of the EXAFS spectra of three Fe(II)/triazole-based spin transition polymeric compounds compared to a monomer belonging to the same family. These compounds have various temperatures of transition and hysteresis loop widths. In the three polymers, the Fe-Fe-Fe alignment, detec…
The computer systems for planning and management of reactor decommissioning were developed for effective implementation of a decommissioning project. The systems are intended to be applied to construction of work breakdown structures and estimation of manpower needs, worker doses, etc. based on the unit productivity a…
Residues 1--10 of porcine fructose-1,6-bisphosphatase (FBPase) are poorly ordered or are in different conformations, sensitive to the state of ligation of the enzyme. Deletion of the first 10 residues of FBPase reduces k(cat) by 30-fold and Mg(2+) affinity by 20-fold and eliminates cooperativity in Mg(2+) activation.…
The present work was initiated to measure and compare tensile strengths (i.e., spall thresholds) of five different types/varieties of silicon carbide materials. Two of these materials were sintered, and the remaining three were hot-pressed. Three types of silicon carbides (one sintered by Sohio and. the other two hot-…
A comparison on the molecular heterogeneity of two whole metallocene short-chain branched polyethylenes (SCBPEs) with different hexene comonomer (butyl branching) content and their Cross-Fractionated (CF) fractions has been made. As elucidated by differential scanning calorimetry (DSC) thermal segregation experiments…
We report the results obtained from the studies of cholesteric gratings doped with a dichroic guest-host dye, G206. First, a dye-doped planar cholesteric texture was switched to a fingerprint texture. Using the pump (Ar + laser)–probe (He–Ne laser) technique, we then studied the diffraction characteristics of the Rama…
The temperature effect upon infrared-to-visible frequency upconversion fluorescence emission in off-resonance infrared excited Yb3+-sensitized rare-earth doped optical glasses is theoretically and experimentally investigated. We have examined samples of Er3+/Yb3+-codoped Ga2S3:La2O3 chalcogenide glasses and germanosil…
The as-deposited stress of typical high-reflectance extreme ultraviolet (EUV) Mo/Si multilayer mirrors is measured to be approximately ?410±10 MPa (compressive). These multilayers are deposited with dc magnetron sputtering and have near-normal incidence (5 deg) reflectances of 67.2±0.1% around 13.2 nm. The effect of b…
The syntheses of various squarylium dyes are reviewed in this paper. Possible applications of these dyes are also discussed, including their electrochromic, electroluminescence, electrophotographic and metal ion sensing properties.
In this paper a continuum description of deformable magnetized material including long‐range magnetic forces and magnetostriction is presented. Herein, magnetostriction and long‐range forces on the one hand, and magnetization and deformation on the other hand are considered simultaneously. Therefore, neither a strict…
The flow of liquid through foam confined in vertical tubes was investigated by measuring the velocity vf of the liquid front forced down by gravity for various flow rates Q. The power law relating the velocity to flow rate of the incoming liquid (vf
Plastic deformation can be applied to the processing or forming of semi-crystalline polymers. This work concerns the drawing of polypropylene (PP) sheets in order to modify their thermo-mechanical properties. PP sheets were rolled at 110°C to induce molecular orientation. A stable drawing process was carried out exper…
Tritium release behavior from Flibe (Li2BeF4) a potential liquid tritium breeding material was investigated. The main chemical form of tritium-containing species in Flibe was controlled to HT or TF by H2 partial pressure and F− potential in an in-pile experimental system. The release rate coefficients of HT and HF, an…
Nanocrystalline ZnS:Pb2+ is synthesised via a precipitation method. The influence of the particle size on the luminescence of nanocrystalline ZnS:Pb2+ is studied. Depending on the excitation wavelength, nanocrystalline ZnS:Pb2+ shows a very broad white (λexc = 380 nm) or red emission (λexc = 480 nm). The red and white…
Single-crystal magnetization, heat capacity and neutron diffraction studies of the bimetallic regular chain Mn II Ni II (NO 2 ) 4 (en) 2 (en = ethylenediamine) are presented. This compound exhibits ferromagnetic interactions between the Mn and Ni ions within the chains. The onset of long-range antiferromagnetic orderi…