Materials Literature
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The concept of a smart vortex generator (SVG) is proposed. The SVG has an upright position when acting as a vortex generator during takeoff and landing, and a stowed position when cruising. This SVG consists of a shape memory alloy (SMA) plate that memorizes the upright position near the ground at high temperatures an…
This paper addresses Scanning Electron Microscope (SEM). In detail, the image noise caused by the transient vibration due to the step moving of the specimen stage disturbs high throughput of the inspection, and the acoustic noise disturbs the correct shape observation of the specimen.This paper shows a way to solve th…
Quantitative‐phase and crystal‐structure simultaneous analysis method has been successfully developed by applying the multi‐phase Rietveld refinement to the diffraction data obtained by synchrotron Gandolfi camera system. This newly developed analytical method has been applied to diffraction experiments with micro‐amo…
Abstract. We have clarified the adsorption and release mechanism of hydrogen to/from Pt clusters on an MCM-41 surface by using the XAFS technique. After reduction, the icosahedral Pt13 cluster of r(Pt-Pt) =0.273 nm is formed. In contrast, a very small oxidized metal particle of r(Pt-Pt) = 0.254 nm is formed after the…
A hemispherical deflector analyzer usually consists of an electrostatic input lens, two concentric hemispherical deflector plates and a channel electron multiplier. Input lens system is used to focus electron beam at the entrance of the hemispherical deflector which disperses the beam according to their energy, and a…
Pure copper (II) sulfide, CuS, was successfully prepared by a simple reaction of copper and sulfur powder in water at low temperatures (less than 60 °C), though the solid state reaction of the elements requires higher temperatures to complete the reaction. Pure Copper (I) sulfide (Cu2S) and silver (I) sulfide (Ag2S) w…
The questions of stability of a circular cylindrical shell supported with circular ribs are considered. The solution is based on the exact statement which is taking into account a discrete location of circular ribs along the shell and the conditions of their conjunction with the middle shell surface. The influence of…
The paper introduces the traditional and degradation preparation methods of chitosan.Degradation is used widely with the simple process,high yield,and pollution-free advantages in the present.We summarize its application in the food industry,medicine field,agriculture,and water treatment,and analysis the current statu…
51 V NMR measurements at ambient pressure and precise magnetic susceptibility measurements under pressure were performed on quasi-one-dimensional conductor, β-Pb 0.33 V 2 O 5 . The observed spectra demonstrates there is no magnetic ordering at low-temperature ∼5 K. Under relatively low-pressure ∼0.5 GPa, the magnetic…
The SiC nano-bar relaxation has been investigated using MD method. The Tersoff potential is adopted as the potential function. The characteristic of the homeostasis of SiC nano-bar relaxation is demonstrated. The nano-bar is affected by the strong surface effect and small size effect. The phenomena of torsion and bend…
In the framework of the HTTR (High Temperature Engineering Test Reactor) project, Japan Atomic Energy Agency has been conducting R&D on thermo-chemical Iodine-Sulfur (IS) process for large scale hydrogen production. Since the IS process constitutes corrosive environments, screening of the materials of construction is…
High Ba2+ ion conduction in a solid, which is within the range for practical application, was successfully realized by doping Ba(NO3)2 into the interstitial open spaces present in a cubic (Gd0.4Nd0.6)2O3 solid solution.
The electro jet drilling (EJD) process is gaining prominence in the machining of micro and macro holes in difficult-to-machine materials used in aerospace, electronics and computers, medical, and automobile industries. As the trend towards miniaturization continues, this process is gaining increasing importance as it…
This study examines the ball-milling of CVD-processed multi-wall carbon nanotubes for cutting and opening their tips. Results show that dry milling causes nanotubes to rapidly collapse, hence transforming into graphite structure, while wet milling with some organic compounds effectively shortened and opened the nanotu…
Single wavelength optical monitoring in intermittent mode was investigated. The achieved coincidence between theory and experiment is outstanding. This monitoring technique enables rapid prototyping with tight specifications and high yield in large box coaters.
The structure of blends of isotactic polypropylene with ethylene-propylene oil was studied by light and atomic force microscopy, X-ray diffraction, and DSC. It was shown that the blends are heterogeneous systems which contain semicrystalline PP and oil crystallizing at low temperatures. An increase in the oil content…
If we can define the word "functionality" as the special interaction between materials, the large surface is regarded as one of the most basic physical properties. Hence, the need of a porous material is very high. Especially the creation of multi porous structures by using the macromolecular self-organization mechani…
Transmission electron microscopy (TEM) analyses of the defects formed in epitaxial SrRuO3 films on SrTiO3 (001) substrates are reported. With preparing three different forms of TEM specimens, i.e. plan-view, cross-sectional and free-standing specimens, various TEM techniques were implemented with placing emphasis on t…
Comparison was made for the citrate stabilized gold colloids prepared sonochemically and thermally. In the sonochemical reduction system, purge gas had large influence on the formation of gold nanoparticles, while little effect was observed for the thermal reduction system. The average diameter of sonochemically prepa…
EPR Study of Paramagnetic Defects in Clay Minerals Radiation induced defects (RID-s) and transition metal ion impurities were revealed by EPR (Electron Paramagnetic Resonance) spectroscopy in kaolinites from a number of Polish deposits. Arelationship between the intensity of the EPR signals of the RID-s and quantity o…