Materials Literature
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Tato diplomová práce se zabývá syntézou a charakteristikou nových fotochromních spiropyranových barviv. Teoretická část se zabývá obecným popisem, vlastnostmi a trendy v použití spiropyranových barviv. Experimentální část popisuje syntézu série spiropyranových barviv, některé z nich nejsou popsány v literatuře. Strukt…
Long-term reactivity control consists of the compensation of fuel reactivity loss due to the fission products build up in the nuclear fuel. This reactivity loss is balanced by the reactivity gain caused by the burnable absorber (BA) depletion. Introduction of burnable absorber leads to flattening of reactivity during…
This study investigate that the influence of shape of WC on solid particle erosive wear of cast-in insertion cast irons. Shape and size of WC were φ5 × 50, φ8 × 50 and □ 8 × 50mm. The area raid of WC of test surface is 50% at maximum. The test specimens for erosive test were mechanically machined to be sized 50×50×14m…
Visco-elastic property of filled rubber is analyzed by large scale numerical simulations. Combining Coarse Grained Molecular Dynamics and large scale Finite Element Method, molecular scale interphase properties and nano-scale filler structure are considered in the analyses. Effect of filler-matrix interaction and fill…
Mechanical properties of the spheroidal graphite cast iron are dependent on the spheroidized graphite. In the field of casting, rare earth (RE) is used in a spherical shape of the graphite. However, domestic production of RE is small, I rely on imports. Therefore, reduction of the RE elements is an issue. In this expe…
This study was carried out to establish the electron beam welding process for a nuclear fuel plate assembly fabrication. A preliminary investigation for plate fuel fabrication was conducted with a consideration of weld performance using AA6061-T6 aluminum alloy made by the EBW (Electron Beam Welding) process. The opti…
In this research work, we investigated the dielectric constant of pure and carbonated polymers using the impedance method. In carrying out the research, low density polyethylene (LDPE) and metallocene polyethylene (MPE) were used as the polymers. The main difference between LDPE and MPE is that low density polyethylen…
In order to improve thermal efficiency of land-based gas turbine, increase of turbine inlet temperature is known to be very effective. Thus, thermal barrier coatings (TBCs) are key technology to protect the blade metal. It is important to develop damage assessment technology for TBC maintenance, in addition to develop…
When a single bubble goes up in liquid, a bubble moves three-dimensionally and meanderingly. Its trajectory changes from straight to straight by zigzag and spiral as the diameter of bubble increases. But the detail of bubble's behavior has not been clear yet because a bubble shape shows a very complex change. It was s…
Independent deterministic analyses of system response and severe accident progression after a station blackout scenario for CANDU single and multi-unit reactors have unveiled a number of design vulnerabilities that cause uncontrolled pressure boundary ruptures; premature expulsion of coolant from main loops and from t…
In order to investigate ablation failure mode of lower head with molten core during a severe accident of light water reactors, ablation and melting relocation experiments were conducted with a hemisphere vessel with a drain hole. Three different silicone oil were used to investigate an effect of fluid viscosity to sim…
Experiments for flow-accelerated corrosion (FAC) of carbon steel specimens were conducted and basic data were obtained, focusing on relatively low temperature condition. FAC rate is seen to decrease by lowering temperature and the trend curve tends to remains to keep considerable level in lower temperature around 50 ℃…
The selective frequency analysis method created in this paper is suggested to design an image filter in the holographic data storage system with the Nyquist aperture. The image filter has been designed with different methods to improve the bit error rate. In previous image restoration methods for HDS, an iteration tim…
Magnesium (Mg) alloys with long-period stacking ordered (LPSO) phase (LPSO-type Mg alloys) have attracted considerable attention because of much higher strength compared with the conventional Mg alloys. The strength of LPSO-type Mg alloys is drastically improved due to metal forming processes such as extrusion and rol…
Electrode catalyst used in industrial electrolysis is important material which affects oxidation-reduction reaction materially. The electrode catalyst having high catalystic activity and high durability gives efficient production of chemical materials. In this study, we proposed to search for new electrode catalyst us…
During the fast reactor nuclear fuel fission reaction, fission gases accumulate and form pores with the increasing of fuel burnup that decrease the fuel thermal conductivity, leading to overheating of the fuel element. The diffusion of plutonium and oxygen with high temperature gradient is also one of the important fu…
Once a severe accident occurs, to estimate the future behavior and risks of the plant, it is important to know the real-time fuel information such as decay heat and nuclide inventories, which is usually different from the safety evaluation with conservative conditions. In order to fulfill this requirement, Mitsubishi…
In this study, thermal properties of plain-woven laminates are analyzed using a triple-scale homogenization method. For this, thermal strain of fibers and matrix materials is incorporated into the elastic-viscoplastic homogenization theory developed by our research group. This method enables us to analyze thermal prop…
We have established a fabrication method of Split Ring Resonator (SRR) for optical region on a peelable polymer film and developed a stacking technique for the film with SRR. The film with SRR (SRR film) fabricated by nanosphere lithography can be separated from the glass substrate by melting a sacrificial layer forme…
The tensile deformation behavior of polyvinylidenedifluoride (PVDF) hollow fiber membranes used for water purification is studied. The present PVDF membrane has sub-micron pores with open cell structure. The surface and cross section of the membranes is observed by FE-SEM to investigate the microstructure (cell size a…