Materials Literature
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The microstructures of a corrosion layer formed on the surface of two Japanese oldest coins, Wadoukaichin (surface color: dark brown and green) were studied. Compositions of these coins are that main element is Cu and Sn and traces are Pb, Fe and As. X-ray diffraction patterns show that copper di-hydroxide (Cu(OH)2 2H…
Fluid catalytic cracking (FCC) commercial units require catalysts with high cracking activity to produce high octane number gasoline fraction to satisfy fuel oil demand and environmental regulations. Previously addition of rare earth metals obtained enhanced cracking activity, but the octane number was decreased by pr…
タンパク質を除去することにより溶出タンパク質量の低い精製天然ゴムを調製することを試みた．具体的にはリーチングによる天然ゴム手袋のタンパク質の除去および尿素，ドデシル硫酸ナトリウムおよびアセトンを用いた高アンモニア天然ゴムラテックスのタンパク質の除去を行った．精製天然ゴムの溶出タンパク質量および全窒素含有率は改良Lowry法およびKjeldahl法によってそれぞれ測定した．リーチングによるタンパク質の除去では，溶出タンパク質量は86 µg/gに減少し，全窒素含有率はわずかに低下するにとどまった．一方，脱タンパク質化によりタンパク質を除去した天然ゴムでは，溶出タンパク質量および全窒素含有率がそれぞれ0.0 µg/gおよび0.000 w…
A method for fabricating multilevel interconnection structures using differential delamination energies (adhesion strength) between metal and silicon oxide thin films has been developed. When the selectivity of the delamination energies between the metal and the silicon oxide thin films sets on the wiring, the silicon…
The Inhibition Efficiency (IE) of Trisodium Citrate (TSC) in controlling corrosion of carbon steel in RO water in the absence and presence of Zn2+ has been evaluated by weight-loss method. The formulation consisting of 150ppm TSC and 10ppm Zn2+ has 72.5% IE. It is found that the inhibition efficiency of TSC increases…
This paper presents a prediction method about pressure drop in tight lattice fuel bundles. Pressure drop of fuel bundle is one of the important parameters to evaluate the core performance. Friction coefficient and spacer loss coefficient depend on the fuel shape. In previous study, these coefficients were evaluated ba…
At wavelengths of 1.55 to 3.0 μm, theoretical simulations were made of electro-optical 2 x 2 switching utilizing a thin-film of Ge2Sb2Te5 or GeTe or GeSe that offers two voltage-triggered self-holding optical states. Low loss and low crosstalk were predicted but experiments are needed to confirm the theory.
Исследованы условия выращивания кристаллов LiNbO3 Zn в интервале концентраций примеси 4.0 8.91 мол. % ZnO. Показано, что в области концентраций 4 6.8 мол. % ZnO в расплаве возможно выращивание композиционно и оптически однородных кристаллов LiNbO3 Zn При концентрации ZnO > 6.8 мол. % вырастают дефектные кристаллы, сод…
The effect of eight different spinning front and back line cots (Synthetic rubber cot) varying only in shore A hardness (65°,83°) on 100% cotton 30’s ring spun yarn has been investigated. The change in cotton yarn properties like mass uniformity, unevenness percent, Imperfection levels (in all class) with progressive…
We have recently developed a series of accurately calibrated nuclear energy density functionals, fitted to essentially all atomic masses with a model root mean square deviation now reduced to 0.5 MeV for our functional BSk27*.At the same time, these functionals were adjusted to realistic equations of state of neutron…
Nb−Al−N films were deposited by magnetron sputtering of Nb and Al in an atmosphere of Ar−N2 onto silicon wafers, at different currents of magnetron power supply, on which an aluminum (IAl) target is mounted. The films were studied by X-ray diffractometry, nano- and microindentation. The size of nanocrystals, microstra…
Был изучен циркон из титаноносного среднепалеопротерозойского Елетьозерского расслоенного интрузивного комплекса ультраосновных-основных-щелочных пород и карбонатитов, а также Sm-Nd система породообразующих минералов образца феррогаббро из этого комплекса. Циркон, выделенный из образцов сиенитов и феррогабброидов, име…
Determination has been carried out for ion mobility in EHD flow zone generated using a pin-concentric multiple ring electrodes and a pin-single ring electrode used as a comparator. The pin needle was made from stainless steel with a tip diameter of 0.18 mm. The concentris multiple ring electrode in form three/two conc…
複合サイクル試験および塩水噴霧試験で腐食生成物を作製し，多変量解析を用いたラマンイメージングによって塗膜下の腐食挙動を解析した．リン酸亜鉛処理またはジルコニウム系化成処理後，カチオン電着塗装を施した試験板を用いて，乾湿繰返しサイクル下の腐食挙動に対する化成皮膜の影響を考察した結果，いくつかの知見が得られた．リン酸亜鉛皮膜ではカット部直下に素材近傍まで腐食生成物が残存し，マクロ腐食の形態で腐食が進行することで腐食先端部近傍にβ-FeOOHが生成する．それに対し，ジルコニウム系皮膜ではリン酸亜鉛皮膜よりはカット部直下に腐食生成物が残存しにくいことや皮膜が有する諸性能により，マクロ腐食の形態になりにくいため，腐食先端部近傍にβ-FeOO…
In this work radiative flameless combustion (RFC) was investigated experimentally, by Chemkin calculations, and an analytical model with radiation was developed to determine the dimensionless parameter space where RFC is possible. The experimental results show ultra-low NO, CO and THC and also show that UV emission co…
In this thesis, surface studies of two-dimensional materials on various substrates will be presented. The central materials of interest are graphene and hexagonal boron nitride, with the former studied exclusively on silicon carbide. Hexagonal boron nitride will be studied both on epitaxial graphene on SiC, as well as…
The structure of clay minerals is made up from tetrahedral and octahedral sheets, which can be stacked in different ways, forming 1:1, 2:1 and 2:1:1 layers. Halloysite, which belongs to the kaolin group, is composed of 1:1 layers while smectite group minerals exhibit 2:1 dioctahedral layered structure. The most import…
Application of artificial neural networks (ANN) in all possible fields is inevitable due to its robustness and simplicity over problem complexity. In this paper, an effort is made to apply ANN for the purpose of fitting and predicting the wear behaviour based on the criteria of various densification levels of molybden…
This paper presents the analysis and simulation of occurrence and development of ferroresonance in real electrical networks. The necessary and sufficient conditions for ferroresonance occurrence have been examined. It has been shown that in electrical networks this phenomenon is non-linear, so some special methods sho…
This thesis consists of two parts. The first part explores a 2-d edge dislocation model to demonstrate characteristics of Field Dislocation Mechanics (FDM) in modeling single and collective behavior of individual dislocations. The second work explores the possibility of modelling adiabatic shear bands propagation with…