Materials Literature
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X-irradiated Li(N2H5)SO4 single crystals were investigated using ESR and ENDOR spectroscopy at several temperatures. The hydrazine radical cation N2H4•+ was selectively produced by irradiation at room temperature. From the analysis of the orientation dependent ENDOR spectra, the 1H-hfc tensors of the cation radical we…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation R. M. Erasmus, J. D. Comins, M. L. Fish, Z. Martin, R. W. MacGregor, J. A. Reid; Raman spectrosco…
The oxygen (O2) compatibility of six polymers used in O2 service was evaluated after 48 h exposures at 121 °C (250 °F) to O2 pressures of 620 and 6200 kPa (90 and 900 psia). Three elastomers were tested: chloroprene rubber (C873-70), fluorocarbon rubber (Viton® A), and silicone rubber (MVQ type); and three thermoplast…
Neutron-irradiation effects on the tensile properties of high-purity Fe–(9–50)Cr and Fe–50Cr–(0–8)W alloys were investigated. These alloys were irradiated at 400, 500, and 600°C to a damage of about 0.4 dpa in a reactor. The yield and ultimate strengths increased by the irradiation, and the increment of these strength…
In the areas of plutonium waste disposition and storage, and medium to long-term retrievable Pu materials storage, the issue of water and other small molecule interactions with pure or impure Pu oxide materials and metal has become a major concern. The interaction of PuO2 with water was investigated from 100 °C to 350…
In this study, the silver nanoparticles (AgNPs) were chemically fabricated from gallic acid and characterized by utilizing UV–Vis absorption spectroscopy and TEM. Then, the influence of surface plasmon resonance (SPR) of AgNPs against MCF-7 cell line was investigated. The synthesized silver colloidal solution was desc…
Nanoparticle engineering offers promising methods for the formulation of poorly water soluble drug compounds. The aim of the present work was to enhance dissolution and oral bioavailability of poorly water-soluble Raloxifene Hydrochloride (RH) by preparing stable nanoparticles. Mechanism of dissolution enhancement was…
This paper reviews recent studies on the microtextures in the Ca-Mg-Fe pyroxenes whose compositions are shown on the common ‘pyroxene quadrilateral'. Two types of microtextures due to phase changes are focused on here; one is the exsolution texture formed by nucleation or spinodal decomposition process, and another is…
Zinc injection into PWR primary coolant in order to reduce radiation buildup has been widely studied, and the reduction effect has been experimentally confirmed. However, some items, such as the optimal concentration of zinc required to reduce radiation buildup, the corrosion control effect of zinc injection, and the…
Complete pore elimination from alumina compacts is attempted under various sintering conditions. An alumina powder of purity of 99.99 % and grain size of 0.2 μm is used as a raw material, and it is mixed with ion-exchanged water of 25 mass%, dispersing agent of 0.6 mass% and binder of 0.1 mass% to prepare slip. Compac…
A new view on the nature of shallow and deep levels in amorphous silicon nitride (a-Si3N4) which is used as thin layers in microelectronics and solar energetics is present. A self-consistent diagram of the electron levels of defects in the forbidden gap of silicon nitride is built up. A non-contradictory model is prop…
A novel approach to diffraction analysis of decorated quasicrystals is discussed. An average unit cell has been constructed for a decorated Fibonacci chain and used for analysis of its diffraction pattern. After some transformation of the scattering vectors, all the diffraction peaks are described by a single envelope…
A modulated structure based on an Al3Pd structure in an Al70Co25Pd5 alloy has been studied by atomic-scale observations with high-resolution transmission electron microscopy (HREM) and high-angle annular detector dark-field (HAADF) technique using a scanning transmission electron microscope. From the electron microsco…
We report here the composition-temperature phase diagram of a mixture between $n=9$ and $n=16$ terms of a chiral tolans series shortly noted $n{\mathrm{F}}_{2}{\mathrm{BTFO}}_{1}{M}_{7}.$ This diagram constitutes an experimental illustration of one of the three theoretical phase diagrams predicted by the Renn and Lube…
Prolonged photolysis of aqueous solutions containing Na3VO4, NaH2PO4, and MeOH at pH 1.8 adjusted by use of H3PO4 led to the formation of a layered vanadyl phosphate, Na(VO)2(PO4)2·4H2O 1. A single-crystal X-ray structural analysis of a dark green crystal of 1 showed that the structure contains layers of vanadium (ran…
An ablation plasma generated by intense, pulsed ion beam was used for thin-film deposition of commercially interesting material (Ba/sub x/,Sr/sub 1-x/)TiO/sub 3/ (0<x<1). The deposition has been carried out in vacuum and on the substrate at the room temperature. The deposited thin films were analyzed by using Rutherfo…
A new epoxy/episulfide thermosetting resin was evaluated, using a dicyandiamide (DICY) curing agent. The system was found to exhibit a longer pot life and prepreg storage life than the standard epoxy system. The properties are attributable to the change in reaction mechanism caused by the addition of episulfide. The r…
Benzo[b]thiophene was successfully converted to 2-(benzo[b]thieno[2,3-d]-1,3-dithiol-2-ylidene)-benzo[b]thieno[2,3-d]-1,3-dithiole (BT-TTF). Charge transfer complexes of BT-TTF with TCNQ, I3 and Sbcl6 were synthesised and their conductivities 0.4, 0.12 and 0.024 a/scm−3 respectively, were measured as compressed power…
The heterochain crosslinking theory is applied to postgel behavior in the free-radical crosslinking copolymerization of vinyl and divinyl monomers. In this context, the crosslinked polymer formation can be viewed as a system in which the primary chains formed at different times are combined in accordance with the stat…
The effect of physical ageing on viscoelastic properties was studied for semi-IPNs based on crosslinked polyurethane and poly(butyl methacrylate) taken in the ratio 75/25 by mass. The viscoelastic properties of IPNs were studied after physical ageing and after heat treatment at 60 °C. Significant changes in viscoelast…