Materials Literature
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In this work, a mullite-zirconia composite was synthesized through the solid state reaction of alumina and zircon powders under transferred arc plasma plume. The influences of processing parameters such as time and torch power on the microstructure of the resultant composite were examined. For this purpose, alumina an…
The advances in proton exchange membranes (PEM)s is critical for improving the performance of fuel cells [1]. Membranes compromising perfluorosulfonic acid polymers such as Nafion have been used extensively due to their desired conductivity and stability. However, these materials need to be saturated with water to obt…
In the terms of nuclear power plant operational life management, current trend of components lifetime extension requires precise information of structural material degradation. Present-day conventional methods of mechanical testing are usually based on the use of large specimens and higher consumption of testing mater…
The inert matrix plutonium and uranium fuels, Pu- and U-Rock like Oxide (Pu-ROX and U-ROX) fuels partial loading PWR core calculations were carried out, and the power distribution, fuel temperature reactivity coefficient (FTC) and spent fuel composition were estimated. In comparison with the MOX-UO_2 partial loading c…
21-25 june 2015
熱可塑性樹脂製構造物の温度依存性を考慮した強度評価を行うために,超弾性・粘弾性・粘塑性・損傷複合材料構成則によって材料挙動をモデリングし,非弾性散逸による自己発熱現象を考慮した熱伝導解析を連成させる.
The techniques to heal fatigue damage by electric current have been studied. However, these mechanism was not investigated in detail. In this study, we observed dislocation motion by transmission electron microscope (TEM) before and after applying electric current in a sample cut out from fatigue specimen. The disloca…
Porous pressure sensitive paint (PSP) having fast response and high pressure sensitivity will be a powerful measurement tool to diagnose flow properties in consumer turbomachinery. We have composed test facilities of a turbofan with a transparent casing, to apply a fast-response PSP to measurement of nonstationary pre…
Experiments have been carried out to examine the performance of radiation cooing by new radiation materials, which is produced by mixing the very fine polar crystal metals into the high efficiency heat radiation paints. This concept is caused by increase of the surface area due to the rough surface generated by nano-s…
Tensile tests were performed using plate specimens of self-reinforced polyethylene (SRPE) with short ultra-high molecular weight polyethylene (UHMWPE) fibers. The effect of fiber length on the properties was investigated. The specimens were made by hot-pressing the stacked HDPE films with short UHMWPE fibers distribut…
LIPIcs, Volume 32, SNAPL'15, Complete Volume
Theory of free-vibration acoustic resonance for a two-dimensional grid-framework structure has been developed within the framework of micropolar elasticity and calculus of variations. Numerical analysis based on the Ritz method revealed the excitation of micro-rotational standing wave in a resonant state. It is also r…
Characteristics of droplet removal by air flow on flat surface of semiconductor wafer were experimentally investigated. Effects of air velocity, nozzle angle and droplet volume on removal characteristics were measured. Deformation and removal processes were observed using a high speed video camera. Type A and Type B w…
The hypersonic air-breathing engine, which is currently under development by Japan Aerospace Exploration Agency (JAXA), uses liquid hydrogen as the fuel. In order to accurately control the fuel flow rate during the start-up, it is essential to measure the heat transfer and pressure drop of the two phase flow. These tw…
Slip deformation in tri-crystal models subjected to cyclic deformation is investigated by a finite element crystal plasticity analysis code. Accumulation of geometrically necessary dislocations (GNDs) and statistically stored dislocations (SSDs) are studied in detail. Results of the analysis shown that non-uniform def…
In our study, we challenged to apply the established techniques to fabricate nano-composite materials using C_<60> to TiAlN, which is harder than TiN. Development of the synthesis method of C_<60>/TiAlN nano-composite must give effective industrial contributions. C_<60>/TiAlN nano-composite thin films with constant th…
Thin plates of lead magnesium niobate-lead titanate (PMN-PT) single crystal were ground with various cup-type resinoid-bonded diamond wheels on an ultra-precision surface grinder to obtain super smooth surfaces. The ground surfaces and sub-surfaces were observed with various instruments, such as laser microscope and a…
The interfacial strength between carbon and phenolic resin is studied by using molecular dynamics simulations in order that carbon reinforced carbon matrix composites (C/C composites) has better strength development rates. Simulations are performed by two carbon fiber models, one of which has only carbon atoms and the…
In order to investigate the criterion of unstable crack propagation induced by singular stress field less than 10 nm, the fracture toughness is examined using nano-scale silicon (Si) single crystal specimens with a precrack. Critical value of stress intensity factor at fracture, K_ , is evaluated to be 0.93〜1.09 MPam^…
In order to precisely investigate molten core relocation behavior in the Fukushima Daiichi nuclear power station, we have developed the detailed and phenomenological numerical simulation code named JUPITER for predicting the molten core behavior including solidification and relocation based on the three-dimensional mu…