Crystal structure of cerium scandium trisulfide, CeScS3
Cristallisation dans Pnma avec a=7,162, b=9,566 et c=6,5029 A, Z=4; affinement jusqu'a R=0,025.
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
An Assessment of the Flammability Hazard of Several Corrosion Resistant Metal Alloys
The Space Shuttle launch environment at the John F. Kennedy Space Center is extremely corrosive. Recent corrosion studies have identified Hastelloy B-2, Haynes Alloy C-230, Hastelloy C-22, Hastelloy C-276, Hastelloy G-30, and Inconel 625 as being very resistant to this launch environment. Since several corrosion relat…
Electron microscopic study of the structure and dissolution behavior of porous anodic films formed on aluminum.
The structure and the dissolution behavior of porous anodic films formed on aluminum have been studied by electron microscopy with various techniques which include SEM, TEM, replica, ultramicrotomy and ion-thinning methods. Cell walls of films formed in oxalic acid were dissolved uniformly, whereas micro-pores in cell…
Seams of Different Ply Properties. Part II: Seam Strength
In the first part of this series, the effects of differences in ply properties and of the mean properties of the plies on seam appearance were examined and discussed. The present part is concerned with the effects of the same factors on seam strength; it also discusses factors affecting fabric strength along different…
INDUSTRIAL FIBRES: A TECHNICAL AND COMMERCIAL REVIEW
Properties, costs and availabilities are reviewed for a number of raw materials in current use, or having potential use, as replacements for asbestos fibre. These include glass fibres and mineral wools; ceramic or refractory fibres; a number of minerals in fibrous or particulate form; and some specific synthetic and n…
Scattering of an Arbitrary Plane Wave by an Infinite Strip Grating Loaded with a Pair of Dielectric Slabs
An accurate numerical solution for the electromagnetic scattering from an infinite strip grating is presented, where the strips are loaded with a symmetrical pair of dielectric slabs. The direction of propagation and the polarization of the incident plane wave are arbitrary. The boundary value problem is reduced to a…
Structural Analysis of Na2O-B2O3 Melts by Pulsed Neutron Total Scattering Method and Molecular Dynamics Simulation.
In order to obtain direct information on the structure of sodium borate melts which are of use in metallurgical processes, pulsed neutron total scattering measurements have been carried out on 10mol%Na2O- and 30mol%Na2O-B2O3 melts at 1073 K, in addition to the previous measurement on pure B2O3 melt. Molecular dynamics…
Investigation of the Relative Affinity of Doxorubicin for Neutral and Negatively Charged Particulate Carriers
Microparticles produced from polyisobutylcyano-acrylate (IBCA) and polyglutaraldehyde (PGA) were investigated for their relative affinity and surface characteristics using doxorubicin (DOX) as a model drug. IBCA microparticles have been reported to exhibit neutral hydrophobic surface features, whereas PGA microparticl…
Phonon Mechanisms of Intrinsic Dielectric Loss in Crystals
Most crystalline solids have phonon spectra that consist of rather sharp lines, i. e. the maximum frequencies are much greater than the half-width of them or in other words, in these crystals, the relative damping of phonons is small. The theory of intrinsic dielectric loss in such crystals is well developed. The deta…
Evaluation of High-Performance Protective Coatings by Electrochemical Impedance and Chronoamperometry
Coatings evaluation methodologies using electrochemical impedance spectroscopy (EIS) and chronoamperometry are described for high-performance corrosion protective coating systems. Three types of coating systems were studied: (1) fusion-bonded epoxy, (2) a marine-service epoxy, and (3) a polyimide used in electronics a…
Phase Instability and Void Formation in Neutron-Irradiated Fe–Cr–Mn–Ni Alloys
A series of Fe–13Cr–15Mn alloys with different nickel levels of 0–15% have been examined by transmission electron microscopy and X-ray microanalysis following irradiation to 17–25 dpa at 693–823 K. All specimens were found to have developed typical features of radiation damage at high temperature; voids, dislocations…
Effects of Y<sub>2</sub>O<sub>3</sub> Addition on the Sinterability and Microstructure of Mullite (Part 2)
The phenomena in the sintering process of Y2O3-added mullite ceramics and the crystallization behavior of liquid phase in sintered bodies were studied using differential thermal analysis, X-ray powder diffractometry, scanning and transmission electron microscopies. The mullite powder compacts containing 2-10wt% Y2O3 w…
Effect of Third Elements on Damping Capacity of Mn-20Cu Alloy
An attempt has been made to develop the manganese-based and workable damping alloys containing 20 at% copper, together with 2 or 5 at% additive elements, such as nickel, iron, cobalt, vanadium, chromium, zirconium, titanium, aluminum, zinc and tin.Nickel was the most effective element for increasing damping capacity o…
EXAFS Study on the Coordination State of Germanium in PbO-GeO<sub>2</sub> Glasses
The coordination state of Ge ions in PbO-GeO2 glasses was examined using EXAFS. It was found that a part of Ge ions changed from 4-fold to 6-fold coordination state on addition of PbO, which had been expected from the property-composition relations. The fraction of 6-fold coordinated Ge ions, N6, increased with increa…
Measurement of Dietary Fiber in Chitin and Chitosan by the Enzymatic-Gravimetric Method.
キチン・キトサンについてProskyらの方法(Prosky法)での食物繊維としての定量性を検討することを目的に,キチンおよび脱アセチル化度の異なるキトサンを粗繊維法,NDF法, Prosky法でそれぞれ定量した.キチンは粗繊維法で定量すると88.9%であったが,キトサンはほとんど定量されなかった.キチン・キトサンのNDF値は94.9～103.2%0であった.また, Prosky法で総食物繊維(TDF)値を定量したところ,キチン・キトサン共に60%程度の値であった.そこで,酵素処理残渣中の粗蛋白値をケルダール法で楚量する際,残溢中のキチン。キトサン由来の窒素量を残渣中の総窒素量より差し引く補正を行った結果.キチンのTDF値は90.6…
Pitting Corrosion Behavior of Stainless Steels in a Marine Environment and Its Estimation Method
The exposed specimens in a marine atmosphere for 10 years were examined to know the pitting behavior of stainless steels. The linear relation was observed between the logarithm of the maximum pit depth and the logarithm of the exposure year, and the slope of the line was around 0.6. The pitting resistance of stainless…
Feasibility of chiral discrimination using X‐ray anomalous scattering
Abstract The paper discusses several feasibility prediction criteria with particular emphasis on light atom molecules. For several examples of refined absolute structures, feasibility predictions are calculated and compared with a posteriori calculated values of the Bijvoet ratio. An extension of the Pathasarathy tabl…
Processing and microstructure of Nb-1% Zr-0.1% C alloy sheet
A systematic study was carried out to evaluate the effects of processing on the microstructure of a Nb-1wt.%Zr-0.1wt.%C alloy sheet. The samples were fabricated by cold rolling different sheet bars that were single-, double- or triple-extruded at 1900 K. Heat treatment consisted of one- or two-step annealing of differ…
Evaluation of Bearing Steels Produced by Powder Metallurgy Process
A variety of steel powders for bearing applications, such as high-speed tool steel, M50 and 440C steels, etc., prepared through vacuum induction melting (VIM) and inert gas atomizer were canned and consolidated by hot extrusion to bars for specimens used in this experiment. The carbide sizes of the extruded materials…
X-ray study of the electron density in calcite, CaCO3
The electron density in synthetic calcite, CaCO3, has been determined using diffraction data for a naturally faced single crystal measured with X-ray Mo Ka (A = 0.71073/~) radiation. Extinction corrections that minimize differences between equivalent reflection intensities are closely approximated by the values which…