Materials Literature
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Magnesium matrix composites show improved wear resistance, enhanced strength and creep resistance in comparison with their monolithic counterparts. On the other hand they keep low density and good machinability. Internal friction measurements are suitable tool to detect changes in the microstructure of thermally or me…
Glass-like carbon (GC) is expected as a die material for press molding of glass micro optical devices. However, the mechanical and thermal properties are not enough to use as precision mold die. So, GC composites reinforced by vapor grown carbon fiber (GC/VGCF composites) were developed to improve the properties. The…
The adsorption equilibrium tests on fluorine and boron were carried out using several soils (Kuroboku, Yellow brown forest, Kanuma and Peat). Then various analysis and considerations were done on the basis of the experimental results.Adsorbed amount of fluorine per unit mass of soil was ranged as Kuroboku ≒ Yellow bro…
The design of fused silica transmission blazed grating based on modal method is presented under Littrow mounting. A -1st transmitted order blazed grating is designed at the wavelength of 1.06 μm. The first two modes (i.e. mode 0 and mode 1) propagate through the grating with different effective indices and couple out…
The elastic plate composed of two semi-infinite plates connected one with other through a thin elastic piecewise-homogeneous inclusion is considered. Stress state in the plates under the action applied to them concentrated forces is studied. The stresses on the lines of contact are found and their behavior near point…
We investigated the reliability of a simple method for manipulating the magnetic vortex chirality using an in-plane magnetic feld. Thevortex chirality stabilized in a regular pentagonal Permalloy nanomagnet is controlled by the direction of the magnetic field. The vortex alters the chirality with a period of 36° becau…
The nickel oxide thin films were deposited on quartz substrate by radio-frequence magnetron sputtering method at room temperature,and the influence of sputtering power on the structural,optical and electrical properties of NiO thin film were mainly discussed.With the increasing of sputtering power,the NiO thin film wi…
Optical disc drives vary significantly in their performance. Here we report a principal components analysis performed on data from new drives, which separates out the better performing drives and finds correlations among drive test variables.
Today, laboratory X-ray diffractometers are seeing increasingly wide use in the ab initio crystal structure analysis of organic powder samples. This is because optics and optical devices have been improved, making it possible to obtain precise integrated intensities of reflections in high 2-theta ranges. Another reaso…
As for cavitating jets injected from an orifice nozzle of inner diameter 0.15 mm at pressure 10-200 MPa into still water at atmospheric pressure, we conducted experiments of flow visualization of free jets with high-speed CCD camera at 50×104 fps and erosion tests of aluminum specimens. From these experiments, the fol…
Chapter 32 discusses a variety of nano-coatings and materials used in the energy and power generation fields. Nano-coatings, nano-composite coatings, nano-layered coatings, functional graded coatings, and multifunctional coatings will be presented. These coatings can be deposited by a wide range of methods and techniq…
Due to their high sensitivity to oxygen, the use of refractory metals requires an effective protection against oxidation. In the case of molybdenum this is achieved by using a sili- con and boron based coating commercially marketed under the trade name SIBOR®. In the moduction of a SIBOR ® -coating, a mix- ture of Si,…
Analysis of optical spectra and luminescence decay curves with reference to host structural peculiarities revealed mechanisms involved in excitation and relaxation processes leading to the visible emission of Pr3+, Sm3+ and Dy3+ in Gd2SiO5 crystals.
Green InGaN/GaN multiple quantum well(MQW) LEDs employing InGaN/GaN superlattice(SL) structure were studied.The distribution of indium within the MQWs is changed by inserting the InGaN/GaN SL.Meanwhile,the average indium content of MQW does not change.Two InGaN-related peaks that were clearly found in the electrolumin…
We show that a metamaterial based on irregular and discontinuous metallic inclusions can show a property expected of hyperbolic metamaterials, such as control of spontaneous emission and reduced reflection.
The principles of polarization holography and recent advances in materials and technology are reviewed. High efficiency and spectrally and angularly broadband diffraction inherent to polarization gratings challenges Bragg gratings for many applications opening new prospects.
The effects of Ag2O-doping on the physicochemical, surface and catalytic properties FeAlO system with various extent of Fe2O3 loading have been investigated. The dopant concentration was changed between 1.5 and 4.0 mol % Ag2O. Pure and variously doped solids were subjected to heat treatment at 400-800?C. The technique…
水性塗料のバインダーはいろいろの樹脂のほか界面活性剤など多くの低分子化合物も含んでいる。これらが寄り集まって高性能塗膜になるためには，樹脂の高分子化のための架橋以外に，低分子による性能低下を避けるための架橋，樹脂の固定・融合のための架橋が必要である。異種樹脂間の融合には架橋が必須であるが，反面架橋は融合を阻止する作用もある。架橋反応を有効に働かせるためには，架橋温度・架橋速度・架橋場所等総合的な配慮が必要である。
特集１◆ ノーベル化学賞と世界化学年： "Chemistry-our life, our future" ─ 21世紀の化学の夢─ 74 学術の動向 2011.5
環境保護の観点から製紙産業においても，節水・省エネルギーに関する技術へのニーズはますます高まっている。同時にグローバル化と激しい競争により，製造コストセービングもまた重要である。NALCOは2006年にケミカルと工程フローを混合するPARETOテクノロジーを発表，これまで多くの工場で節水・省エネルギーと工場生産性改善を両立してきた。コンピュータを使用した流体力学シミュレーションにより設計されたPARETOオプティマイザーがこの技術の心臓部であり，そこから放出される円錐状のケミカルジェットが工程フローとケミカルの確実な混合を可能とする。また従来ケミカルの2次希釈水に使用されていた新水を工程水等で代替することで節水が可能となる。ポリマ…