Materials Literature
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Transformer failure is usually triggered by external events such as lightning strikes, switching transients, or short circuits. However, susceptibility to these events is usually due to some incipient weakness in the insulation system, which may be detected at an earlier stage by monitoring partial discharge activitie…
This paper described the production of a novel biosynthetic material using the manufacturing technique of electro spinning for the construction of scaffold for organ replacement. This electrostatic technique uses an electric field to control the deposition of polymer fibres onto a specific substrate to fabricate fibro…
Foam generation plays a crucial role in foam processes for improved oil recovery, acid diversion and environmental remediation. This study extends previous work to layered media, the effect of surfactant concentration, and injection strategy, including alternating-slug (SAG) injection and pulsed injection rate and pre…
Annealing effects on the elastic behavior of sphere-forming polystyrene-block-polyisoprene-block-polystyrene (SIS) and polystyrene-block-polyisoprene-block-poly(2-vinylpyridine) (SIP), annealed in a cone-plate attached to a rheometer at 150 °C with and without additional shear, are examined by dynamic mechanical analy…
We demonstrate a direction controllable linearly polarized laser from a dye-doped cholesteric liquid crystal (CLC) in a homogeneous cell coated with a metallic mirror on the inner side of a glass substrate. Due to coherent superposition of two orthogonal polarization states, the output laser light becomes linearly pol…
Characteristics of hydrogen permeation in the stainless steel 304 modified by either facing, ion sputtering, carbon coating or annealing were investigated in order to establish the safe hydrogen-energy-infrastructure using welding. A stationary hydrogen flux from the stainless steel surface was measured by using a sys…
A fundamentally new procedure was proposed for evaluating the parameters of plasticizer desorption from flexible-PVC compounds by quantitative description in terms of a developed kinetic model and of TGA data obtained under the conditions of a linear rise in temperature up to the onset of chemical transformation. The…
Multilayer thin films were prepared on the surface of a gold (Au) electrode using sodium carboxymethylcellulose (CMC) to elucidate the suitability of the polysaccharide-based thin film as a scaffold for constructing chemical sensors. A quartz crystal microbalance study revealed that an alternate deposition of CMC and…
We have performed the X-ray powder diffraction measurements for Mn3Ga0.97Al0.03C with a perovskite-type structure in the temperature range from 8 to 320 K in magnetic fields up to 5 T, in order to investigate the structural properties affected by the magnetic field. The compound has a successive magnetic phase transit…
Microstructural evolution taking place in pure copper during multi-directional forging (MDF) at 77 K and 300 K was studied. Samples were deformed up to total strain of 6.0 at maximum. At 300 K, the flow curve showed a rapid increase in flow stress at the early stage of deformation followed by steady-state flow at stra…
In many cases that shape memory alloys are applied to engineering and medical fields, it is necessary to deform them in martensitic phase and after that, to recover them by heating. However, if a slip-deformation occurs, a shape recovery does not occur completely even if heated up above a reverse transformation finish…
This paper deals with the environmentally assisted cracking behavior of high strength cable wires of a suspension bridge, expos ed to marine environments. The main objective is to determine the safety of a bridge system locally and globally. To evaluate the safety of a suspension bridge, an ultimate limit state for th…
空気リークは吸収式冷凍機本体の腐食トラブルの主原因と考えられている. 本報では, 空気リークシステムを有する20冷凍トン吸収式冷凍機本体を用いて, 空気リークを模擬した腐食加速試験を実施した. 空気リーク速度を変化させ, 冷凍機内の溶存酸素濃度変化および機内LiBr溶液及び冷媒中の炭素鋼及び銅の腐食生成物 (イオンおよび酸化物) の濃度変化を測定した.一方, 種々のインヒビターを含むLiBr溶液中で炭素鋼の腐食電位上昇に及ぼす温度, 溶存酸素および銅イオン濃度の影響を検討した. また, 種々の温度において, アノード分極曲線より炭素鋼の孔食電位を決定した. 腐食電位の上昇挙動と孔食電位の関係から, 炭素鋼の腐食損傷加速に及ぼす影響…
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This study aims to clarify the influence of cup-stand materials on clothing pressure, compressive feeling, silhouette evaluation and physiological responses (heart rate and blood pressure). We conducted wearing tests of pushup type brassieres of which cup-stand materials have different tensile resistances. This includ…
小角中性子散乱 (SANS) はゲルの構造研究に非常に適した研究手段であり, 約四半世紀の歴史をもつ. そこでSANSによる高分子ゲルの構造研究の発展をゲルの不均一性とミクロ相分離の理解を中心に概説した. ゲルの散乱関数には不均一性の寄与を考慮することが不可欠であり, それには現象論的記述や統計力学による架橋点分布を考慮した理論などが提案されていることを示した. そして, そうした理論を使って環境敏感型ゲルの構造解析を行い, 温度や解離による構造変化の分子論的解明を行った例のいくつかを紹介した. さらに, スーパーゲルと呼ぶべき優れた力学的性質をもつゲルの構造解析と変形メカニズムの解明, 環境敏感型ヒドロゲルの圧力・温度誘起相分離…
Low temperature superplasticity was studied in a fine-grained magnesium alloy AZ31 which was processed by multi-directional forging (MDF) under decreasing temperature conditions. Tensile specimens were machined from MDFed Mg alloy parallel to the final compression axis. Tensile tests were carried out at temperatures f…
A 52-year-old woman physician developed recurrent erythema multiforme. Occupational and environmental exposure assessment suggested a disinfectant containing polyhexamethylenebiguanide hydrochloride (PHMB), Phagosept. Elimination of the product was followed by disappearance of symptomatology. Literature search reveale…
Most reliability issues in interconnect systems occur at a local scale and many of them include the local build‐up of stresses. Typical failure mechanisms are electromigration and stress voiding in interconnect lines and fatigue in surface acoustic wave devices. Thus a local probe is required for the investigation of…
Abstract. Mn0.67Zn0.33Fe2O4 nanoparticles with size ranging from 20 to 80 nm have been synthesized using the modified oxidation method. The Curie temperatures for all the samples are found to be within 630 ± 5 K suggesting that there is no size-dependent cation distribution. Mössbauer studies on the synthesized nanopa…