Materials Literature
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For improvement of Sever Accident code, the core relocation process has to be clarified. To clarify core relocation process, it is necessary to understand the melting behavior of fuel elements. But the melting process of fuel elements cannot be clarified only by the experimental study. Then we are developing the numer…
We consider a canonical spherical scattering problem, and show that by coating a rigid spherical body with a fiber-reinforced layer of a metamaterial with a suitable gradient in material properties, the scattering of shear waves from the body can be significantly reduced, as many shear modes are guided around the body…
An ionic polymer-metal composite (IPMC) actuator, which consists of a thin perfluorinated ionomer membrane and electrodes plated on both surfaces, undergoes a large bending motion when a low electric field is applied across its thickness. IPMC actuators are lightweight and soft and can operate in solutions. They are t…
Multichannel measuring systems are used to measure strains and accelerations during drop tests of containments for dangerous goods. Conventional systems require cabling of each sensor and co-falling of the cable harness, causing problems in the test preparation and execution. Promising results of a single cable measur…
It is well known that WC-Co cemented carbides have an excellent wear resistance. However, information about their fatigue crack growth behavior is limited. In the present study, the fatigue crack growth behavior of the fine grained WC-Co cemented carbide was investigated as a function of the stress ratio, R. The crack…
SiC fiber reinforced SiC matrix composites (SiC/SiC) are promising material for turbine engine components of future turbo-fan aero-engines. SiC/SiC exhibits nonlinear stress-strain behavior due to matrix crack propagations. The objective of this study is to evaluate non-linear stress-strain behavior and strain distrib…
Diamond-like carbon (DLC) coatings have begun to appear attractive for automotive parts due to their excellent friction and wear resistance properties. In recent years, many researchers focus on their tribological properties under boundary lubricated contacts. Especially, it is well known that hydrogen free ta-C DLC c…
The deformation mechanism of extruded AZ31 magnesium alloy rod under various temperature conditions was studied. The deformation mechanism was made clear by the changes of microstructures. The clarified mechanism was particularly what acts on the orientation for which trans granular sliding and grain boundary sliding…
The numerical simulation on ionic liquid electric double layer capacitors (EDLCs) with mesoporous electrodes consisting of cylindrical pores has been conducted to clarify the effect of porous geometry on the performance of the capacitor. The results show that the charge at the surface of the porous is dominant and the…
As current reactors approach the end of their operable lifetime, new reactors are needed if nuclear power is to continue being generated in the United States. Some utilities have already began construction on newer, more advanced LWR reactors, which use the same fuel as current reactors and have a similar but updated…
The internal oxidation depth of the self-healing agent by the oxygen diffusion in matrix was defined as the indicator to durability assessment for self-healing ceramics. Using the reported oxidation diffusion coefficient, The attainment depth of the oxygen ion by inner direction diffusion was evaluated. Furthermore, t…
Vertically aligned carbon-nanotube (CNT) film is expected as a superior low contact thermal resistance material. The microscopic deformation behavior of CNT in contact is clarified by previous study, but the difference in the deformation behavior when changing the length of CNT is not clarified. The vertically aligned…
The present paper investigates effect of line-beam irradiation on electrode films for micro solid oxide fuel cells in a process of green-tape laser sintering. The line-beam formed with a cylindrical lens was scanned in parallel to or in vertical to the long axis of the beam, having the advantages of a uniform sintered…
Bacterial Cellulose is the natural cellulose, characterized by a three-dimensional structure network of micro fibril. BC possesses an array of unique properties, including high crystallinity, high tensile strength, therefore BC have been an interesting topic in the field of research and development. In this paper, the…
パワーデバイスで問題となる異種材界面はく離に対して,温度サイクル試験環境を想定したせん断の破壊モードに対応するはく離評価法を提案し,パワーデバイスに用いられる高耐熱封止樹脂のはく離強度評価を検討した.
In this master of thesis study, WO3 thin films were prepared by reactive RF magnetron sputtering method and the effects of the film deposition parameters on the optical, structural and electrochromic properties of the films were investigated. Thin film properties depend on the deposition parameters such as total press…
Wettability behavior of drop弖 ets on i 蹴
The SMC belt composed of two kinds of SMAs with different phase transformation temperatures and SMP was fabricated and the three-way (reciprocating) movement and recovery force in bending actuation were investigated. The results obtained can be summarized as follows. (1) The three-way bending movement was achived duri…
Graphene has exhibited great potential for the application of next-generation electronic devices. However, undesirable interface stress induced during graphene transfer and device fabrication process causes the deformation of graphene, resulting in the change in its electronic properties. In this study, the effect of…
Fukushima Daiichi NPP accident would be terminated, if sufficient accident countermeasures, such as water proof door, mobile power, etc. In case of Europe, it had already recommended to install core catcher from the lessons of Chernobyl Accidents. In this paper we introduce simplified core catch by using core catcher…