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。
Using two different types of ionomers which are composed of Nafion and hydrocarbon (HC), we constructed systems of the ionomers on Pt catalyst surface, and investigated water content dependence on oxygen permeability in the ionomers using molecular dynamics simulations. We have found that the oxygen permeability of th…
We have investigated adsorption and subsequent dissociation of oxygen molecules on the NiO surface with and without vacancies by ab initio molecular dynamics simulation to understand the elementary process of the oxygen reduction reaction in the SOFC cathode. Oxygen molecules were adsorbed both on the surfaces with an…
Numerical simulations were carried out for venous thrombus formation depending on the shear strain rate and its duration time. Blood components were modeled by an assembly of computed particles and the fluid mechanics was solved by the MPS method. A spring force was used to express blood aggregates that form thrombi.…
Microfracture process in ceramics was analyzed using Monte-Carlo simulation. It was supposed in the simulation that the microfracture process consists of the maincrack formation resulted from the growth and coalescence of pre-existing microcracks, and the propagation of maincrack to final failure. To determine the cra…
Mechanoluminescence (ML) is one of a luminescence phenomenon, which is excited by the mechanical energy, such as strain energy. Thus, ML is expected to use as a stress sensor. In this paper, in order to investigate the relationship between the bending stress and ML, a four point bending test is carried out by using an…
In recent years, fatigue limit estimation based on energy dissipation has been attracting considerable attention. In this method, temperature change due to irreversible energy dissipation is measured by infrared thermography in various levels of stress amplitude, under cyclic loading. It is experimentally observed tha…
De-bonding stress between SiC particle and Aluminum matrix is studied with cast hybrid Metal Matrix Composite (MMC) with SiC particles and Al2O3 whiskers. A notch is machined in the MMC sample and a wedge is inserted into the notch to introduce a crack. Raman spectrum of a SiC particle ahead ofthe crack is observed al…
In this study, singular stress at corners in an anisotropic two-dimensional joint structure under a tensile loading is analyzed using molecular dynamic (MD) method and the anisotropic elasticity theory. The analysis of stress fields near interface misfit dislocation in a two-phase anisotropic body considering interfac…
This paper presents an experimental study of direct-current discharge plasma on the surface of a flat plate placed in a Mach 3 airflow. The discharge is generated between a pair of upstream electrodes or a pair of downstream electrodes mounted on the surface of a flat plate. Current and voltage measurements indicated…
Composite sintering is a critical fabrication process strongly correlated with an initial performance of solid oxide fuel cells. However, the controlling a composite sintering is still matter of debate because of its inherent complexities of the microstructural evolution during sintering. In this study, we numerically…
Hypervelocity impact experiments were performed on transparent materials, SiO_2 glass and polycarbonate, to investigate the impact-induced damage process. Stress wave propagation and damage evolution associated with hypervelocity impact were visualized using a high-speed video camera. Recorded images clearly showed ho…
A numerical analysis method for compression behavior of polymer foam considering the microstructure was developed. The analysis code was developed based on finite element formulation applied with the homogenization method. The unit cell for the homogenization method was applied to a part of the microstructure. To pred…
Fox, Bethany R Storrs; Wartho, Jo-Anne; Wilson, Gary S; Lee, Daphne E; Nelson, Faye E; Kaulfuss, Uwe (2014): ARM measurements from the Foulden Maar core FH2 prior to demagnetisation [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.834777, In supplement to: Fox, BRS et al. (2015): Long-term evolution of an Oligocene…
A dislocation in a crystalline material has dangling bonds at its core and strong strain field in its vicinity. Therefore, it has a potential to exhibit peculiar physical properties. In this study, we investigated electric properties of dislocations in lithium niobate. In order to introduce dislocations in the crystal…
Bakalářská práce se zabývá testovacími metodami korozního inženýrství a to metodami mechanických testů, zrychlených korozních testů a elektrochemických testů v laboratorních podmínkách. Experiment je cílen na sledování antikorozních účinků daných zinkových povlaků nanesených na ocelových panelech a to pomocí korozních…
We studied the flow field of glycerol exposed to air jet flow above its free surface filled inside two parallel flat walls. The gap in the walls of was varied from 1 to 4mm, the distance from the bottom of the nozzle to the glycerol surface h was from 0 to 10mm, and the jet Reynolds number was varied from Re=5×10^3 to…
method High -perfo mance compu 9 1
Wide gap semiconductor substrates are hard to process materials, and are manufactured by various processing methods. CMP is a main processing method to planarize a substrate. On the other hand, P-CVM is a superior processing method which does not damage the substrate surface. To achieve high efficiency, high quality p…
Rolling bearings, which are widely used to support rotating shafts for several industrial machineries, are based on tribology. Tribology is the science and technology of interacting surfaces in relative motion and of related subjects and practices and it is an engineering field that deals with friction, wear, and lubr…
Sodium analogues of ivanyukite-Na and lintisite were synthesized by hydrothermal methods, and ion-exchanged forms of both these compounds were obtained. These materials were characterized by powder X-ray diffraction, thermal analyses, scanning electron microscopy and microprobe analysis. It has been found that obtaine…