Materials Literature
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The bending fatigue tests were performed using the micro-cantilever-shaped specimens of AZ31 magnesium alloy fabricated by the focused ion beam (FIB) processing to investigate the effects of the scale and the grain orientation on the fatigue behavior. The configuration of specimen was the rectangular cross section of…
The generalized stacking fault energy (GSFE) curves of the basal and second-pyramidal slips in Magnesium are investigated by first-principles calculations. For the basal slip, the unstable and I_2-type stacking fault energies are decreased with increasing the normal strain perpendicular to the slip plane. In Mg-Y, the…
In order to evaluate the influence of nano-wires formed at interface on delamination strength of SiC films, the nano-wires were formed on high-speed steel substrates by a plasma discharging method, and the SiC film was deposited on the substrate using a sputtering apparatus. The delamination strength was evaluated usi…
The Russian TOPAZ-II reactor is a single-cell thermionic, Zirconium hydride moderated, epithermal design with a highly enriched UO2 fuel. The waste heat from the reactor is removed by the eutectic sodium-potassium coolant, and given off to the space by a radiator. According to the special feature of this space power s…
For popularization of hydrogen fuel cell vehicles, adequate amount of hydrogen refueling stations is indispensable. Accumulators are regarded as important parts for the stations, and have to be made with low cost and enough reliabilities. Conventional steel accumulators have problems of manufacturing such as heat trea…
The silicide phase formation is examined in the Ni/Si system. The multiphase of NiSi and NiSi2 is confirmed in the specimen, in which a 30-nm-thick Ni film is sputter-deposited on Si(100) at 350°C and subsequently annealed at 400°C for 1 h. This is interpreted that the NiSi and NiSi2 phases nucleate from the amorphous…
Capillary pressure boundary condition model was introduced into the numerical solver for polymer electrolyte fuel cell based on the OpenFOAM. The boundary condition module can predict water saturation jump so that the thermodynamic equation of state is satisfied on the interface between the catalyst layer and gas diff…
This paper presents an investigation of the thermoelectric performance of super lattice structure diamond-like carbon (DLC) Films deposited on glass substrates using unbalanced magnetron sputtering (UBMS). The respective thermoelectric performances of the super lattice structure DLC film and TiC single-layer film were…
To realize a lens drive actuator in mobile camera utilizing MEMS technology, micro-pitch and multi-pole magnetization of a sintered Nd-Fe-B magnet of 500 μm in thickness was discussed in this paper. First, the Nd-Fe-B magnet was bonded on a glass substrate using polyimide adhesive to buffer the thermal stress due to t…
The upgrade of the JT-60U to the superconducting tokamak "JT-60SA" has been carried out to contribute the early realization of fusion energy by addressing key physics issues relevant for ITER and DEMO. Disassembly of the JT-60U tokamak was required so as to newly install the JT-60SA torus at the same position in the t…
This paper describes the ongoing activities for the development of structural codes in Japan Society of Mechanical Engineers (JSME) for fast reactors including the Japanese prototype reactor Monju, and the demonstration reactor JSFR (Japan Sodium-cooled Fast Reactor), which is under conceptual design study. The existi…
In order to decrease friction coefficient of DLC(Diamond-like Carbon) film by external action, we developed the method to apply electric discharge during friction. In the case of friction between Si-DLC film and SUJ2 ball in air, frition coefficient decreased instantly by discharging. The firm transfer layer was gener…
Purpose of this study is to investigate the fracture mechanisms of shoulder part of composite pressure vessels subjected to impact loading. CFRP laminates simulating shoulder part of composite pressure vessels were fabricated by filament winding (FW) followed by vacuum assisted rein transfer molding (VaRTM) process, a…
The influence of loading direction on microstructural evolution of rolled AZ31 magnesium alloy (average grain size: approximately 40μm) was investigated. Pseudoelastic behaviors were observed in tensile and compressive loading-unloading tests. The large anelastic strains and work hardening coefficient were observed in…
This study aims to investigate the performances of a near surface repository subject to fuel burning occurring simultaneously or subsequently to a large commercial aircraft impact. Specifically the therm al effects cause d by a Boeing-747 crushing (considered like "beyond design basis accident") are studied. An import…
This paper reports on flash-evaporation of flexible thick (30 μm) TiNiCu shape memory alloy (SMA) film. Effects of film-composition and annealing condition on phase transformation behavior, crystalline structure, and film flexibility were evaluated. The film composition depended on heating power of evaporate-boat. Whe…
최근 다양한 형태/성질을 가지는 나노물질의 제어기술 발달에 따라 물질의 균일한 조성 및 모양의 제어가 가능하여 이들 물질을 통한 물성제어 및 응용에 대한 연구가 활발히 진행되고 있다. 하지만 기존의 대부분의 나노물질이 가지고 있는 특성은 벌크물질보다 낮은 열적 안정성, 전하이동 등 단점들로 인해 다양한 산업군에 적용하는데 있어 제한되는 실정이다.이를 극복하기 위해 현재 태양전지의 absorption layer 물질로 널리 사용되는 페로브스카이트 (CH3NH3PbI3)을 응용하여 나노물질이 가지고 있는 단점들을 극복하려 한다. 아직까지 페로브스카이트 (CH3NH3Pb…
The Severe Accident (SA) leading to core melt had not been considered to occur in Japanese Nuclear Power Plants (NPPs) because various kinds of countermeasures were adopted for the first through third layers of Defense in Depth (DiD). The direct cause of Fukushima Daiichi accident was considered to be the loss of all…
Cellulose nanofiber composites cause less damage to the environment, but poor strength is a major drawback. Therefore we focused on the orientation of nanofibers as a way to strengthen the composite material. By unidirectionally orienting fibers, mechanical properties can be improved as reported in previous studies. T…
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