Materials Literature
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Systematic measurements of optically induced birefringence in the series of homologous polyoxyethylenediols have been carried out. Macroscopic and microscopic parameters of the molecular liquids studied, such as viscosity, molecular Kerr constant and effective optical anisotropy, have been calculated. The majority of…
In metallic magnets, scattering from magnetic fluctuations above and near To may provide a substantial contribution to the electrical resistance p(T). However, this effect is usually small because the dominant fluctuations are near q 0, which does not produce substantial backscattering across the Fermi surface unless…
Effect of additions of 7.02～11.98 percent nickel alone on the corrosion resistance of type 304 stainless steels TIG welded joints was evaluated by electrochemical measurement and immersion tests. It was demonstrated that the additions of nickel not only decreased the general corrosion rate, increased both the E b valu…
By reaction of urushiol and MoOCl\-4, the urushiol\|molybdenum chelate polymer was prepared which possessed properties of lacquer and chelate. This reaction forms non\|dissolving,non\|melting and black precipitates of urushiol\|molybdenum chelate polymer.The Mo percentage by weight of polymer prepared by different rea…
Cracking of a cristobalite-containing mullite body at the middle stage of crystallization during cooling was investigated by acoustic emission (AE) and the crack formation was discussed. The specimen was composed of an outside layer of crystalline cristobalite and the inner part remaining as a glass phase. There are t…
An Irradiation Assisted Stress Corrosion Cracking (IASCC) has not been found in Pressurized Water Reactors (PWRs). However, the authors have investigated on the possibility of IASCC so as to be able to estimate the degradation of PWR plants up to the end of their lifetime.In this study, the authors melted the test all…
Barium ferrite films were prepared by r.f. diode sputtering on AlN underlayers, whose influence on the films’ c-axis orientation and magnetic properties was investigated. Hexagonal AlN underlayers with thicknesses of around 30-100 nm were deposited at room temperature. On the underlayers with a thickness of 30 nm, bar…
Cristobalite, a low-density polymorph of silicon dioxide (SiO2), shows an unusual elastic behavior of negative Poisson ratio, contracting laterally when compressed and expanding laterally when stretched. We have successfully evaluated the adiabatic second-order elastic stiffness constants in the temperature range of 3…
The purpose of this study was to determine the effect of the fitting window size used with the linear least squares fit method when quantitating trace elements with electron energy loss spectroscopy. Theory and computer simulation with a simple model of two 'signals' show that, when the background underlying the signa…
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…