Materials Literature
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Intergranular and internal oxidation in slab reheating process for hot-rolling was investigated for ultra-low carbon steel with 0.01 mass% Si. Intergranular oxidation depth significantly increased at 1 473 K because of melting of Fe–Si–O complex oxides and decreased with increasing oxidation temperature at above 1473…
Six aluminum hydroxide adjuvants, poorly crystalline aluminum oxyhydroxide (AlOOH) were prepared using different thermal treatments of amorphous aluminum hydroxide (Al(OH)3) in an effort to increase the protein adsorption capacity. All of the adjuvants initially exhibited a higher protein adsorption capacity. However,…
This paper describes the method evaluating the appearance of fabric-wrinkling replicas objectively by image processing. Results indicate that the wrinkle can be reliably measured using the distribution of gray level and the ratio of surface area, the ratio of X-direction length and the one of Y-direction length of sur…
The characteristics of the reaction between hydrogen isotopes and uranium were investigated using depleted uranium from nuclear fuel manufacturing waste. Activation of the uranium was conducted by heating the experimental vessel to 450 ℃ under vacuum conditions, while the reaction temperature was room temperature. The…
The surface area of the individual phyllosilicates (clay minerals) in Athabasca oil sands determined from XRD crystallite size measurements was found to be comparable to the bulk surface area measured by ethylene glycol monoethyl ether adsorption. The primary phyllosilicates are kaolin and illite but the large surface…
The process of grain growth in ultrafine-grained nickel was studied using differential scanning calorimetry. Samples of nickel, with mean grain sizes in the range from 100 to 400 nm, were prepared by equal-channel angular pressing, high pressure torsion or combinations of both. It is shown using differential scanning…
A realistic non-spherical model for bubble formation in a co-flowing liquid is presented. In the model, an interfacial element approach is applied to describe the dynamics of bubble formation. The effect of flowing liquid velocity is modeled by a combination of the bubble axis translation and liquid pressure analysis…
Improvement of the corrosion resistance of refractories is required critically, since Al2O3 based conventional refractories used for incineration at the power generation plants are seriously corroded by the molten oxide mixture. In this study, the effect of the addition of Cr2O3 to Al2O3 on the corrosion resistance, a…
Because of the semitransparency of pBN in the infrared spectral region, the heat flux within this material does not only depend on its solid thermal conductivity, but also on its radiative properties. In order to characterise the heat transfer in pBN samples, the thermal and infrared optical properties were determined…
Analytical electron microscopy (AEM) was used to study the separate effects of the irradiation parameters on the evolution of the microstructure in recrystallized alpha-annealed Zircaloy-4 under controlled irradiation conditions. The effects of fast neutron flux from ∼4 × 1013 n/cm2-s to ∼1.5 × 1014 n/cm2-s (E &gt…
Five new Ni(dmit)2 anion radical salts, [Me3Te][Ni(dmit)2]2 (1), [Me3Te][Ni(dmit)2]3·(CH3)2C(O) (2), α-[MOT][Ni(dmit)2]2 (3), β-[MOT][Ni(dmit)2]2 (4), and γ-[MOT][Ni(dmit)2]2 (5) (dmit = 1,3-dithiole-2-thione-4,5-dithiolate; MOT = 1-oxa-4-methyl-4-telluracyclohexane) have been prepared by galvanostatic electrolysis. X…
溶融混練法によって生分解性のポリ乳酸/層状ケイ酸塩ナノコンポジットを調製し, その熱的性質, 機械的性質, ガスバリア性, 生分解性について評価した. 各種アンモニウムカチオンで有機化処理したモンモリロナイトおよび合成フッ素雲母を用いることで, 溶融混練法でも層間挿入型ナノコンポジットが得られ, 各種物性が向上した. 特にヒドロキシル基を含有するアンモニウムカチオンで有機化処理した合成フッ素雲母を10%添加したナノコンポジットでは, 印加荷重0.98MPaでの熱変形温度において, ポリ乳酸と比較して38℃向上し, 曲げ弾性率は1.5倍に向上した. またこの合成フッ素雲母を用いると酸素透過率は1/4まで低減でき, 生分解速度も2倍近…
Superplastic behavior and microstructural evolution in a commercial Mg–3Al–1Zn magnesium alloy were investigated at temperatures between 623 K and 723 K and strain rates between 10−5 and 10−3 s−1. Grain refinement was obtained in the test alloy due to the dynamic recrystallization during an initial stage of tensile te…
The paper presents the design of a 3-DOF parallel robot actuated by SMA wires. The paper explains the kinematic model, the mechanical design and the control system of the robot. The robot control system is a closed loop one with the feedback of the electric resistance of the SMA wires. The actuators are Nitinol wires…
N -Trimellitylimido-S-valine 3 was prepared from the reaction of trimellitic anhydride 1 with (S)-(+)-valine(2-amino-3-methylbutyric acid) 2 in acetic acid solution at refluxing temperature. The direct polycondensation reaction of the monomer imide-diacid 3 with 1,4-phenylenediamine 4a, diaminodiphenylmethane 4b, 4,4'…
Distortion is one of the major obstacles for effective utilisation of wood, especially in the building process, where wood has lost market shares to other materials largely because of the lack of s ...
Polymer microspheres can be easily injected into the brain to provide a local and sustained delivery of chemotherapeutics to a tumor or surrounding tissue subject to high rates of tumor recurrence following surgery. Building on previous studies that established the clear advantage of local, peritumoral injections of s…
This paper is intended to provide an engineering understanding of the technological potentials for processing polypropylene (PP) foams in rotational foam molding. A process proposal, based on the melt compounding material-preparation approach, capable of producing completely foamed, single-layer, single-piece PP produ…
A new model was recently established describing the stiffness of polymers as a function of temperature. This polymer stiffness-temperature model was proven to be applicable to thermoplastics for the entire temperature range from the glassy state to the flow of the material. The present paper focuses on the potential a…
We have conducted a study of second phase particles and matrix alloying element concentrations in zirconium alloys using synchrotron radiation from the Advanced Photon Source (APS) at Argonne National Laboratory. The high flux of synchrotron radiation delivered at the 2BM beamline, compared to conventional X-ray gener…