Recently biomass energy is attracting attention, but utilization method for wet biomass can be still developed. Supercritical water gasification is effective to convert wet biomass slurry feedstock into the energy because of water with high reactivity. When such slurry feedstock is used for this gasification, slurry feeder is needed. However, there is no solid procedure for feeding slurry and mass balance in many researches are not well closed. That is why this research is focusing on establishing slurry feeder and making sure key parameters of mixing slurry materials. High pressure container was made for this research and the evaluation of this feeder was conducted by the recovery rate with changing the agitation rate, the amount of feedstock and the distance between the plate and the feedstock. In this research, shochu residue and activated carbon was used as slurry feedstock.
In order to realize a new structure and function, direct joining method of dissimilar materials has been studied. According to previous results, friction stir welding (FSW) is possible to make dissimilar materials joint such as steel and aluminum alloy, copper alloy and aluminum alloy, etc.. It is expected to add various functions like composite materials by joining materials with different properties. The present research work aims to develop a thin dissimilar materials joint plate produced with rolling process followed by FSW between aluminum alloy and various metallic materials. In this report, effect of rolling process on strength characteristics under static and cyclic loading condition in a dissimilar materials FSW joint between copper and aluminum alloy is shown.
It is clarified that the frictional properties for material surface is controllable by machining a micro-pattern on the surface. In the previous research, it is considered that strain of materials such as spring-back can be reduced by controlling the frictional characteristics in the blank holder during the press forming. However, evaluation only by the experiment is difficult due to huge combinations between the shape of micro patterns and the arrangement density. Therefore, evaluation by numerical simulations is necessary for present study. In this research, evaluation of effects by the differences of the shape of micro-patterns and the arrangement density is conducted by the experimental method and numerical simulation.