Materials Literature
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Stress corrosion cracking (SCC) can occur on the exterior surface of high pressure hydrocarbon transmission pipelines fabricated from low carbon steels. Both the initiation of SCC and the ability of SCC to progressively increase in depth is a complex and poorly understood phenomena. Previous empirical evidence suggest…
The role of polyoxyethylene lauryl ether (POELE), a nonionic surfactant, in removing bovine serum albumin (BSA) and catechin from polyethylene terephthalate (PET) particles was quantitatively studied. Relatively large fractions of adsorbed BSA and catechin were removed from PET particles under weak alkaline conditions…
Rapid solidification of a non-dilute binary alloy is studied using a phase-field model with a general formulation for different diffusion coefficients of the two alloy components. For high solidification velocities, we observe the effect of solute trapping in our simulations leading to the incorporation of solute into…
This study is concerned with the numerical simulation of a drop moving on a surface due to a wettability gradient. The wettability gradient is introduced by varying the static contact angle along the surface. The unsteady laminar Navier-Stokes equation is solved in each phase using a fixed Eulerian unstructured grid.…
ナイロン6 (PA)/スチレン-アクリロニトリル共重合体 (SAN), PA/ポリスチレン (PS), PA/ポリプロピレン (PP), SAN/PP, PS/PPおよびPP/エチレンプロピレンラバー (EPR) 系ブレンドをブラベンダー型二軸混練機で溶融混練により調製した. これらのブレンドに関して, 分散相粒子サイズに及ぼす成分ポリマー間の界面張力, ブレンド組成, ブレンドのレオロジー的性質および混練条件の影響を調べた. その結果, 数平均分散相粒子サイズrnは, 次式 [rn∝γ12φ2/3dσ-1/2] で表されることが明らかになった. ただし, γ12, φdおよびσは, それぞれ成分ポリマー間の界面張力, 分散相成分…
Sophisticated modern instruments and methods can contribute to the preservation of national and cultural heritage. Modern analytical methods such as chromatography, spectrometry and densitometry are extremely useful, particularly for the analysis of rare works of art from which only very small samples are available. T…
In order to avoid restrictive fissile loading limits in some types of US Department of Energy (DOE) spent nuclear fuel, nuclear criticality control measures are needed in standardized waste packages for long-term disposal of high-level radioactive materials in the proposed Yucca Mountain repository. This need has been…
The nature of free radicals produced in gamma-irradiated poly(ethylene terephthalate) (PET) has been studied by the electron spin resonance (ESR) and Fourier transform infrared (FTIR) techniques. ESR and FTIR spectra of irradiated PET are recorded at different temperatures and radiation doses, to observe the behaviour…
We have investigated atomic arrangements and electronic properties of two-dimensional Si compounds having the Si(111) skeletons with H and/or OH-radicals terminators, using first-principles calculations within the density functional theory. A mechanism of the onset of a direct gap for the planar siloxene has been clar…
In conventional gas turbine systems combustion results in high exergy losses (∼30%) of fuel exergy input. Replacing the combustor with a high temperature fuel cell, like the Solid Oxide Fuel Cell (SOFC), will significantly reduce these exergy losses. As the SOFC electrochemically converts the natural gas, exergy losse…
The effect of oxygen and carbon oxide on the SnO 2 surface conductivity is considered in the framework of the early model of gas adsorption on semiconductor oxides. A change in the work function of the adsorption system is calculated.
Hydriding combustion synthesis (HCS), which utilizes self-propagating exothermic reaction between metallic powders at pressurized hydrogen, was originally developed for metal hydride production. It offers many advantages to save processing time, to reduce productive cost, and to synthesize high purity product. In this…
Poly(phenylene sulfide) (PPS) films were modified by Ar, O2, N2 and NH3 plasmas in order to improve their adhesion to copper metal. All four plasmas modified the PPS film surfaces, but the NH3 plasma modification was the most effective in improving adhesion. The NH3 plasma modification brought about large changes in t…
The absorption spectra, fluorescence spectra and the lifetimes of 4I13/2 level of Er3+-doped phosphate and tellurite glasses ha ve been measured for sample with different concentrations and thickness. The abs orption cross-section (σa), emission cross-section(σe), spontaneous emission probability(Arad), radiative life…
Normal impact of high‐speed armor piercing bullet on titanium‐steel composite has been investigated using smooth particle hydrodynamics (SPH) code. The objective is to understand the effects of impact during the ballistic testing of explosively welded armor plates. These plates have significant microstructural differe…
This paper presents results of the dynamic mechanical response of for two structural woods, i.e. birch and sequoia. Monotonic and cyclic compression testing at room temperature of these materials was performed using a modified Kolsky method; a 20‐mm diameter split‐Hopkinson pressure bar (SHPB). The birch and sequoia s…
Catalytic wet-air oxidation (CWAO) of wastewater (chemical oxygen demand [COD] = 1800 mg O2/dm3) from a fine chemicals plant was investigated in a fixed-bed reactor at T = 393-473 K under total pressure of 5.0 or 8.0 MPa. Catalysts containing 0.3% wt. of platinum deposited on two supports, mixed silica-titania (SM1) a…
The non-equilibrium molecular dynamics simulation (NEMD) has been performed based on the embeded atom potential to obtain the pair correlation function and the viscosity of liquid Al.The pair correlation function by the simulation agrees well with Waseda's X\|ray diffraction measurement.The temperature dependence of v…
Silk organza can make the silhouette of clothes bulky and rich, owing to its stiffness. And silk organza in the gum has better dyeability so can be dyed more bright and deeper color than scoured silk because silk organza has sericin gum that has better dyeability than fibroin. So, silk organza came into the most broad…
The effects of the external magnetic field on the energy gap of carbon nanotubes were investigated by using the tight-bonding method. It was found that, under the applied magnetic field, the peak of energy gap induced by magnetic field and the slope of energy gap versus magnetic field depend on their diameters tightly…