Materials Literature
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Plastic slip deformation of a HCP bicrystal is analyzed by a crystal plasticity FE code and distribution of plastic shear strain on the primary and secondary slip systems, as well as some stress components are examined. The constituent crystal are idealized ones and slip deformation on basal, prismatic and pyramidal s…
Uniaxial tensile testing for single crystal silicon (SCS) films was conducted to investigate the fracture mechanism of silicon. The loading axis of the SCS specimens had three main crystallographic orientations, that is <100>, <110>, and <111>, fabricated from one (110) silicon-on-insulator wafer. The dimensions of sp…
The inhibition effect of ethanolamines on zinc in ( HNO3 + HCl ) binary acid mixture has been studied by weight loss method and polarization techniques. Corrosion rate increases with the concentration of acid mixture. The inhibition efficiency (I.E.) of ethanolamines increases with the concentration of inhibitors. Cor…
Mass transfer characteristics of gas diffusion layer (GDL) are closely related to cell performance in polymer electrolyte fuel cell (PEFC). The new type structure GDL (hybrid type GDL), in which two kinds of porous media with different pore size distribution were arranged adjacently, was evaluated as a specimen. Time-…
In microminiaturization of metal injection molding, the use of finer metal powders is one of solutions for improving the dimensional accuracy and surface roughness of sintered products. This study aims to investigate the effects of micro/nano powder ratio on the properties of sintered parts in μ-MIM process. A novel e…
We have investigated phase transitions and internal aggregate structures of a highly dense suspension composed of magnetic plate-like particles with a magnetic moment normal to the particle axis, by means of the Monte Carlo method. In the present study, we have considered a quasi-2D system in order to clarify the infl…
Triacetone triperoxide (TATP), a cyclic peroxide explosive, is frequently used by terrorists and amateur chemists due to the ease of synthesis and the availability of reagents. TATP is extremely sensitive to shock, heat, and friction thus a safe and rapid method for treating TATP is needed. The major objective of this…
Low friction mechanism of hydrogenated Diamond-Like Carbon (a-C:H) was assumed that sp^3 structures were destructed to graphite-like having low shearing strength. However, these structural changes generally occur when a-C:H coating was rubbed during several thousand cycles so-called running-in process. However, long r…
This paper investigated the effect of high-rate deformation on the change of mechanical properties on the surface of metallic materials during a peening as a surface modification of metallic materials. Especially, we focused on the introduced compressive residual stress and the yield stress increase on the surface, wh…
Cu alloys used for recent rocket combustion chambers are exposed to severe conditions, i.e., high temperature environments with oxidizing followed by reducing. Therefore, it is very important to understand the effects of such severe environments on their mechanical properties for maintaining their integrity for a long…
A study about the influence of time on the hydrolisis of ”rice straw” to produce microcrystalline cellulose has been done. The hydrolytic process was conducted in 2.5 N hydrochloric acid solution at 100ºC for 1 hour, 1.5 hours, 2 hours, 2.5 hours respectively. The physical properties of microcrystalline cellulose yiel…
Titled homologous series: n-Butyl-p-(p/-n-alkoxy cinnamoyloxy) cinnamates is synthesized and studied with a view to understand the relation between mesogenic properties of substances and their dependence on molecular structure. Methyl to pentyl homologues are nonmesogenic, while, hexyl, octyl, decyl, dodecyl, tetradec…
The humidity sensing properties of La3+/Ce3+-doped TiO2-20 wt.%SnO2 thin films were studied.Sol-gel method was employed to prepare the films on alumina substrates.By constructing a humidity-impedance measuring system,the sensing behaviors were inspected for the films sintered at different temperatures.Experimental res…
Biomass derived syngas is widely expected to establish the local energy supply. The context comprises syngas utilisation via dual fluidized bed gasification to heat and power generation and moreover the conversion into synthetic natural gas, liquid fuels or chemicals. Essential requirement for the application and furt…
The solid state reaction method was used to prepare tablets of (V(2)O(5))(100-x) (Al(2)O(3)) x with x =5.10 15.20 wt % thin film of Al(2)O(3) doped V(2)O(5) were deposited onto glass substrated using and electron beam evaporation technique. The influence of doping and annealine temperature on the structural and optica…
Change of the mechanism of accumulation of fatigue damages leads to sectional-linear description S-N curve view and change of functions of long life time distribution that have two-parametric bi-exponential distribution with logarithmic life time. The experimental estimations of durability mean and root-mean-square de…
Liquid hydrogen absorbers for the Muon Ionization Cooling Experiment (MICE) have been developed, and the first absorber has been tested at KEK. In the preliminary test at KEK we have successfully filled the absorber with ~2 liters of liquid hydrogen. The measured hydrogen condensation speed was 2.5 liters/day at 1.0 b…
Welding is a commonly used and one of the most important material-joining processes in industry. The incidences of defects had been located by ultrasonic testing (UT) in various pressurizer nozzle dissimilar metal welds (DMW) at nuclear power plants. In order to evaluate the crack propagation, it is required to calcul…
Fiber-reinforced polymer (FRP) composite materials have effectively been used in numerous reinforced concrete civil infrastructure strengthening projects. Although a significant body of knowledge has been established for epoxy matrix carbon FRPs and epoxy adhesives, there is still a need to investigate other matrices…
In this research project the behaviour of strain-hardening, cement-based composites (SHCC) subjected to low and high strain rates was studied. Uniaxial tension tests on dumbbellshaped SHCC specimens were performed at rates ranging from 0.00001s to 50s. For the tests performed at strain rates of 0.01s and below, SHCC y…