Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
As development of micro electro mechanical systems (MEMS) technology, microforming is gaining attention. And, lubricant-free microforming process is a strong demand. Due to the low effect of lubricant in microscale dimensions, the tribological issues in microforming confronts with further severe problems to enhance th…
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…
Graphene grown on a substrate is likely to be polycrystalline. Defects consisting of pentagons or heptagons of C atoms make rows at grain boundaries in such polycrystalline graphene. In this paper, the tensile strength of polycrystalline graphene is investigated using the method of atomistic simulation. Simulation mod…
In this talk, I introduce the interdisciplinary research field "Molecular Robotics", which is being formed in between chemistry and robotics. I explain the notion of molecular robots and then introduce the five-year research project "Molecular Robotics", which began in 2012 as an innovative area funded by MEXT, Japan.…
The air fleet in Russia was being created on the base of foreign aircraft technical equipment. After The October Revolution it was decided to graduate high-skilled air force personnel with engineering education. They were to design domestic airplanes and aircraft engines, to organize their production, to be ready for…
Deformation behaviors in Bimodal microstructure were studied by a crystal plasticity software code. The Bimodal microstructure consists of fine and coarse crystal grains. Some numerical models for such structure were constructed by the Voronoi dynamics software where growth process of crystal nuclei were simulated. Re…
Mg -Zn -
The tetrahedral amorphous carbon (ta-C) DLC coating showed superlow friction behavior under the boundary lubrication with an organic friction modifier such as glycerol mono-oleate (GMO). On the other hand, there are many reports about the tribological properties of DLC coatings under lubrication with zinc dialkyldithi…
For wide application of magnesium(Mg), it is necessary to quantitatively evaluate the activation condition of each deformation mode observed in deformation experiments of Mg. In usual experiments, critical resolved shear stress(CRSS) is used for quantitative evaluation of deformation. However, recent work on deformati…
In order to investigate the mechanical factors dominating crack propagation induced by nano-meter-scale singular stress field, crack propagation experiments are carried out using silicon (Si) single crystal specimens, which possess precracks with nano-meter-scale singular stress field. The minimum size of singular str…
Joint microstructures and fatigue behavior of ferritic stainless steel type 430 welds with different weld metals were investigated. Two weld metals with different chemical compositions, NbL1 and NbL2, had been used for the MIG butt welding of type 430. NbL2 with Al and Ti showed fmer grains in the weld microstructure…
The influence of loading direction on cyclic deformation behavior of rolled AZ31 magnesium alloy (average grain size: approximately 40μm) was investigated. Cyclic tensile and compressive loading-unloading tests were carried out using cylindrical smooth specimens. Pseudoelastic behaviors were observed in tensile and co…
We propose a distorted optical waveguide around a microsphere to mimic curved spacetimes caused by the “gravitational fields”. Gravitational lensing effects analogues are experimentally demonstrated and this can be used to prospective light harvesting.
This study focuses on the self-crack-healing process of Al_2O_3/30 vol.% SiC composites. Specimens with cracks were subjected to thermal treatment at 1000℃ and 1200℃, their strengths were measured by a three-point bending test, and nano/micro structural analysis of crack-healed zone was performed using scanning electr…
A flame combustion method enables the synthesis of diamond using acetylene-oxygen in ambient atmosphere. It has various advantages over other methods. In this method, during cooling, most diamond films delaminate as a result of thermal stress. We previously synthesized diamond films on a Mo substrate surface by the fl…
Thermoelectric generation units have been produced using cascade modules of oxide and Bi_2Te_3 devices. Power density of the cascade module is as high as 7.8 kW/m^2 at 1000℃of the heat source temperature and higher than that of Bi_2Te_3 and oxide single modules at temperatures higher than 800℃. A thermoelectric unit c…
In order to clarify the mechanism of core meltdown which occurred in the Fukushima Dai-ichi nuclear power plant, the details of the melting behavior of fuel elements, such as fuel rods and control rods, must be clarified. However, it is not easy to obtain these data experimentally. Then, to clarify the melting behavio…
Macro- and micro-structure and hardness of hardened layer of induction hardened SUJ2 and SCM435 steel gears were measured, and profiles of hardened layers and effective hardened depths were obtained. Bending fatigue tests of induction hardened SUJ2 and SCM435 steel gears were carried out and S-N curves and bending fat…
Identify of vibration damping mechanisms of
Effect of surface profile processed by micro slurry -jet erosion