Materials Literature
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ZnO bulk materials were implanted by O and Zn with different concentration and their photoluminescence (PL) properties were investigated in detail. The results clearly show that O and Zn implantation indeed have great influence on the green light emission. By comparing the PL spectra for the samples with different imp…
The effect of parameters for composite powder preparation on the electrochemical performance of cathodes using a mechanically prepared LSM/ScSZ cathode material for solid oxide fuel cells was evaluated. It was revealed that the input process energy, which is defined as a time integration of required power for rotor-bl…
A computer code, named COMPASS, is being developed employing the Moving Particle Semi-implicit (MPS) method for various complex phenomena of core disruptive accidents (CDAs) in the sodium-cooled fast reactors (SFRs). The COMPASS is designed to analyze multi-physics problems involving thermal hydraulics, structure and…
In order to study the effect of main-chain conformation on the second-order non-linear optical properties, two novel isomeric polymers, consisting of hexa-2,4-diynylene-1,6-dioxydinaphthoates main-chains containing a polar azo dye, Disperse Red 19, were synthesized and characterized. The 1,2- and 3,2-polymers had a T…
熱処理条件の異なる共析鋼に蓄積した水素量を電気化学的方法を用いて測定した．この方法では昇温分析法に比べて水素量が約30％少なく見積もられた．乾湿1サイクルあたりに蓄積する水素量は0.01から0.1 ppm程度であり，金属組織に依存した．ミクロ組織の異なる鋼に蓄積する水素量はマルテンサイト＞パーライト＞球状化セメンタイトの順に減少した．複数回の連続した乾湿サイクルで蓄積する水素量は1サイクルのときに比べて多くなり，金属組織による違いも大きくなった．
The short-range structural parameters for NaNO2 and KNO2 pure melts were determined by the time-of-flight neutron diffraction. The precise analyses of structural parameters obtained such as coordination number, interatomic distance, and temperature factor allowed us to conclude that (1) there exist stable NO2− anions…
Nonlinear electrohydrodynamic stability of two superposed dielectric bounded fluids streaming through porous media in the presence of a horizontal electric field is investigated in three dimensions. The method of multiple scales is used to obtain a dispersion relation for the linear problem and a Ginzburg-Landau equat…
Different corrosion mechanisms and their extent within a sinter plant gas pipeline were studied. The low temperature-high moisture at the charging side and high temperature-low moisture at the discharging side exist in the main gas pipeline. The waste gas velocity is maximum near charging side and minimum near dischar…
The crystallization behaviors of Zr-Ni-Nb-Cu-Al metallic glasses are greatly influenced by the substitution of Ni for Zr. For the glassy Zr71−xNixNb3Cu16Al10 (x=7, 9, 11 at%) alloys, the onset temperature of crystallization Tx increases from 717 to 748 K with increasing Ni content from 7 at% to 11 at%. The primary cry…
2 2 1) 1 6 m m Zr65Al7.5Ni10Cu17.5 2) 127K
Conspicuous metallic blue of Morpho butterflies is well known and attract interest because it is a brilliant luster of natural beings. The blue is produced by their proteins, which are almost transparent without pigment. The origin of the coloration with high reflectivity (>~60%) is then attributed to an interference…
Fatigue crack growth characteristics were investigated for sintered and thermal-sprayed tungsten carbide with cobalt (WC-Co) cermets. Acoustic emission (AE) techniques were applied to study the crack growth mechanism. The materials used were two types of sintered WC-Co materials, commercially available as G5 and KD20…
Radiation and chemical stabilities of CMPO-functionalised calix[4]arenes, promising ligands for extraction of actinides and lanthanides, were studied both in solution and in the solid state. A comparison of the results showed that the degradation of ligands under radiolytic conditions proceeds indirectly via interacti…
Sea urchin-like nanostructures of ZnO were fabricated on Si (100) by simple oxidation of ZnO films at 600°C consisting of ZnO nanorods. ZnO nanorods having diameter of 40 nm to 80 nm and length of 3 μm to 4 μm as shown by scanning electron microscope (SEM). They are similar in shape with uniform diameter along its ent…
During thixomolding® of Mg alloys, fine grains (size of ∼10 μm) and continuous eutectic compounds are formed along grain boundaries. These compounds are partly responsible for the superior creep strength of Mg alloys. In this study, we investigate the effects of eutectic compounds formed along grain boundaries in thix…
The response of the magnesium alloy, AZ61 to shock loading has been investigated in terms of it's Hugoniot (Equation of State) and variation of shear strength with impact stress. Comparison of the Hugoniot with that of the similar magnesium alloy AZ31 shows very little difference, and hence gives us confidence in our…
We have measured resonant third-order optical nonlinearities of organic nanoparticles. Five kinds of near-infrared dyes, silicon 2,3-naphthalocyanine bis(trihexysiloxide) (dye 1), methylsilicon (IV) phthalocyanine chloride (dye 2), 2,3-naphthalocyanine (dye 3), 2,4-di-3-guaiazulenyl-1,3-dihydroxycyclobutendiyliumdihyd…
The current work focuses on the effect of silica and titania nanotubes and their synthesis conditions on the potential antibacterial activity. Since most investigations are oriented towards carbon nanotubes, we focused on studying the biological activity of oxide nanotubes obtained under different synthesis and differ…
As plans for new U.S. nuclear power plants encounter problems, their proponents seek to shift ever more economic risk to taxpayers who are already staggering under the weight of other federal bailouts.
We present an elaborate electron-spin resonance study of the low-energy dynamics and magnetization in the ordered phase of the frustrated spinel ZnCr2O4. We observe several resonance modes corresponding to different structural domains and found that the number of domains can be easily reduced by field-cooling the samp…