Materials Literature
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Tremendous recent progress in nanofabrication capabilities has made high-quality single-atomic layers and nanostructures with dimensions well below 50 nm commonplace, enabling unprecedented access to materials at the nanoscale. However, tools and techniques capable of characterizing the properties and function of nano…
In this study, advanced repairing technology based upon High Velocity Oxy-Fuel (HVOF) spraying technique, which would be replaced with typical weldment technique, has been interested. Thus, the purpose of this study is to show adhesion strength of the component repaired by HVOF spray technique in comparison with other…
Thermal fragmentation process plays a key role in Fuel Coolant Interaction (FCI) during NPP's severe accidents, which significantly affects the heat transfer and determines the ratio of heat transferred to mechanical energy. Although various thermal fragmentation models have been raised, the phenomenon is not well und…
Functional group on silica surface is controlled for modification of wettability. Silica substrate is firstly terminated with trifluoromethyl group (-CF_3) by silane coupling treatment, which exhibits high hydrophobicity. The surface is then modified by laser irradiation with various power and scan speed to control qu…
Much attention has recently been given to poly(lactic acid) (PLA) because it is degraded to nontoxic lactic acid through non-enzymatic hydrolytic degradation in the body. As one of the methods to improve mechanical properties of PLA, orientation of molecular chains by drawing has been investigated. In this study, PLA…
The relationship between magnetic phase transition temperatures (Curie temperature: Tc, ferromagnetic-antiferromagnetic transition temperature: T0) and lattice distortions in L10 FePt1−xRhx thin films (6 nm thick) were studied. Thin film depositions on varied substrates modifies lattice constants due to misfits betwee…
The reprocessing of spent nuclear fuels at the Rokkasho reprocessing plant generates radioactive wastes in solid and liquid forms. These wastes contain a mixture of radioactive nuclides such as Transuranium (TRU) elements, fission products (FP), and corrosion products (CP). The waste processing methods prior to dispos…
The oil separation system plays an important role in improving the quality of oily metal cutting chip as recycled materials disposed from metalworking factories. In this paper, a practical circulation-type superheated steam degreasing system, which is applied to oily metal cutting chip disposed from a metalworking fac…
Dry textiles are usually incorporated into the RTM method as a fibrous reinforcing material. The architecture of the textile material affects both the permeability and material properties of the final product. We optimized the textile architecture to improve manufacturing efficiency and product quality. In this optimi…
The pebble bed reactor (PBR), a kind of high-temperature gas-cooled reactor (HTGR), is expected to be among the next generation of nuclear reactors as it has excellent passive safety features, as well as online refueling and high thermal efficiency. Rock-like oxide (ROX) fuel has been studied at the Japan Atomic Energ…
Corrosion is one of the basic reasons of the ship hull strength retrogression; therefore, it is necessary to control the operational mode of the systems of the ship steel hull electrochemical prevention from corrosion. At the same time, it is necessary to estimate the ship steel hull potential function by means of mob…
グルコース単位が環状に繋がったホスト分子シクロデキストリン(CD)および酸化還元応答性ゲスト分子フェロセン(Fc)を側鎖に導入したポリマーや高分子ゲルを用いて，酸化還元応答性超分子材料を創製した．側鎖にCDを修飾したポリマーとFcを修飾したポリマーとの混合により超分子ヒドロゲルが形成された．ホスト–ゲスト相互作用の可逆性に起因する自己修復性を見いだし，Fcの酸化還元に伴うCDとの相互作用の変化を利用してこれをオン・オフ制御した．この超分子ネットワークに化学架橋を導入すると，酸化還元に応じたゲル内部の架橋密度の変化に伴い膨潤・収縮するゲルとなった．さらにCDおよびFcを別々のゲルに導入するとそれらが接着することを見いだし，Fcの特徴…
O receptor P2X7, contido na família de receptores P2, é um receptor inotrópico purinérgico, cátion seletivo, ativado por nucleotídeos (ATP). Esses receptores são expressos em células do sistema nervoso central, periférico e células da linhagem hematopoiética além de estarem envolvidos em diversos processos biológicos…
Ethanol has the same theoretical air-fuel ratio as DME but has different reactivity. In this study, effect of ethanol blending on ignition and combustion of DME spray was investigated by numerical calculation. As the results, the ignition timing retards and the equivalence ratio in a spray shifted toward lean with eth…
We investigate the characteristics of cogging torque and unbalanced magnetic force (UMF) due to the interaction between magnetization of permanent magnet (PM) and stator eccentricity in PM motors. We numerically show that the third harmonic of PM magnetization interacts with stator eccentricity to decrease the amplitu…
Geopolymers are amorphous, inorganic structures based on silicate and aluminate tetrahedrons and could be beneficial in thermal and fire resistant applications. The outcomes from this work suggest that fly ash geopolymer composites suitable for thermal applications can be produced. When compared to OPC based systems g…
Metal/Metal universal joints reinforced by carbon fibers had been proposed to save the energy and to enhance the mobility of mover machines. The ductile fracture occurred at aluminum part in the Ti/Al joint with carbon fiber reinforcement (CFR). Although the tensile strength (σ_b) was slightly reduced, its strain (ε_b…
We report for the first time thermal conduction tuning in phononic crystals. This tuning is based on the wave properties of phonons at low temperature, similarly to what can be done with photons.
Last few decades, many researchers have experimented with micro-scale compression or tension test, and have reported that the plastic behavior of crystalline materials with small dimensions is different from that of bulk. For designing microsystems, it is very important to understand deformation mechanism of nano- and…
Aminosilanized micro patterns were transferred on mica substrate using PDMS soft stamp fabricated by utilizing anisotropic etched Si substrate as a mold and proteoglycan molecular immobilization were investigated. Two types of parting agents were investigated to improve detachability of PDMS stamp from Si mold, and pi…