Materials Literature
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New sesquisulfides of the lanthanides with the U 2 S 3 -type structure (M 2 S 3 , M = Tb and Dy) were prepared through the oxidation of TbClH 0,67 and DyCl 2 , respectively, with appropriate amounts of sulfur in the presence of NaCl fluxes in silica protected sealed tantalum containers at 850 °C for at least seven day…
The spectroscopic model of a doping center - Cr4+ ion, occupying tetrahedral site of YAG-lattice (Cr4+) is developed by the polarizing spectroscopy investigations of Cr,Me2+-doped YAG single crystals and the calculation of energy levels for an electron configuration d2 in a crystal field of Dzd point group symmetry. N…
The design and construction of a circuit using Hg-wetted relays to deliver a high current (1 A) at high amplitude (+or-50 V) with short pulse rise and fall times (>
Strength measurement under tensile stress and analysis of fractured surfaces were conducted for single SiC fibers heat-treated at 1300° C from a tension test. The tensile strength of the heat treated fibers was reduced by 45% compared with as-receive fibers. Pits are formed on the fiber surface during heat-treatment a…
Quantitative measures of the time required for effective ergodicity to be realized in a dynamical system are developed and applied to computer simulations of strongly supercooled Lennard‐Jones fluid mixtures. The techniques employed are generally applicable to the study of ergodic‐nonergodic transitions and can also b…
This review summarizes the published theoretical and experimental studies of Csl radiolysis in an operating fuel pin. The calculation method, which has been developed based on gas kinetic theory, is effective for the evaluation of the radiation effect on iodine pressure. The iodine partial pressures, which were calcul…
Experiments with Mixtures. By J. A. Cornell. ISBN 0 471 52221 X. Wiley, Chichester, 1990. 632 pp. £47.50.
We study the aggregation kinetics of Electro‐Rheological Fluid particles which interact through dipoles induced by an external electric field and experience negligible thermal motion. For a system in d‐dimensions, our theoretical calculations show that the average cluster size sav increases with time t as sav∝t d/d+3.…
The Magnetic properties of high-silicon steel sheets of thickness range from 0.35mm to 0.03mm and silicon content from 3% to 7.5% were investigated. The minimum iron losses were obtained with the silicon higher than 6.5% at high frequency range over 30kHz. The sheet thickness dependency index m was estimated. The heat…
NH3/CO/O2/Ar系高温気相反応におけるNH3からのNO, N2OおよびN2生成について理論解析を行い, 流通式管型反応管を用いて得られた実験結果と比較した.計算は21個の化学種を含む65個の素反応について行い, その結果をNH2/H2/O2/Ar系の解析結果とも比較した.実験との比較は, 反応温度950～1350K, [NH3] 0=1000ppm, [H2] 0=0.2～3.0%, [CO] 0=3.0%, [O2] 0=0～3.0%, [Ar] 0=バランスの条件のもとで行った.その結果, 本研究の範囲において, 次のような知見を得ることができた.1) 本研究に用いた素反応モデルは, 実験結果を良好に説明することができ…
The Ni-Ti type shape memory alloy has been applied in many fields, though the welding process for it is not so sufficiently studied. The development of various welding processes must bring this alloy to the wider use in more fields.So far, the study on the electron beam welding, the laser welding, the resistance weldi…
Abstract By utilizing the laser induced pressure‐pulse (LIPP) technique, the behavior of space charge in low‐density polyethylene (LDPE) and crosslinked polyethylene (XLPE) films in contact with metal or carbon‐loaded semiconducting layers was studied quantitatively to clarify the space‐charge characteristics in power…
Abstract Dielectric relaxation measurements are reported on plasticized commercial and heterogeneously substituted cellulose acetate. Differences in the observed behaviour are attributed to the retention of a degree of crystallinity and microscopic structure in the original substituted cellulose samples. A comparison…
The kinetics of spreading of molten poly(ethylene terephthalate) (PET) on aminopropylsilane (APS) treated glass fiber surfaces has been studied. The modified Wilhelmy wetting method was used for contact angle determination with small diameter fibers (10-100 μm) used as vertical wetting probes. It is shown that the sma…
The finite element technique has been used to develop a software package which, with the help of an IBM/PC 386 computer, can determine two dimensional magnetic fields and power loss in transformer cores. The program takes into account both the non‐linear B‐H characteristic and the anisotropy of the core material.
Abstract The nature of the chain‐folding in polyethylene lamellar structure from the melt has been studied. Permanganic etching was used to reveal the morphology by selective removal of material from the surface of the specimen. This was done to prepare the sample for transmission electron microscopy. The micrographs…
The adsorption of tris(1,10-phenanthroline)copper(II) ([Cu(phen) 3 ] 2+ ) by a clay mineral has been studied with electron spin resonance (ESR) measurements. The chelate, tris(1.10-phenanthroline)copper(II) ([Cu(phen) 3 ] 2+ ), is co-adsorbed with a large excess of racemic or enantiomeric [Ru(phen) 3 ] 2+ . The spectr…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Fracture toughness of Si3N4 ceramics with and without addition of TaSi2 particles, prepared by hot-pressing at 1750°C and 1650°-1750°C, respectively, was determined. The fracture toughness increased significantly with increasing TaSi2 content. The enhanced toughness by the addition of TaSi2 particles was interpreted t…
Abstract Auf einem breiten Spektrum von Böden in westafrikanischen Teakplantagen ( Tectona grandis L.) wurden signifikante Beziehungen zwischen den P‐Blattgehalten von Tectona grandis und den Ergebnissen der P‐Bodenanalysen nachgewiesen, wenn nicht ausschließlich sehr ton‐ oder humusarme Böden (< 15% T bzw. < 1%…