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。
In this study we propose a simple computing procedure to determine in probabilistic form the material constants that enter fatigue-life calculation, namely fatigue strength (ductility) coefficient f , ( f ) and fatigue strength (ductility) exponent b (c). The procedure, which assumes log-normal distribution of fatigue…
Over the past decades, hot stamping technology has been gradually applied to the production of ultra high-strength automotive components. Although automotive components such as bumpers, door impact beams, center pillar reinforces have been produced by hot stamping and installed in many cars worldwide, this promising t…
The chemical structures of aged dicumyl peroxide(DCP)-crosslinked EPDMs were investigated with FT-IR and 13C high-resolution solid state NMR. The mechanism of degradation induced by residual DCP was studied in DCP-crosslinked EPDMs.The thermal degradation of DCP-crosslinked EPDMs occurred with the disappearance of C=C…
The solidification methods for powder wastes dried at CWDS(Concentrate Waste Drying System) in PWR have been studied in a variety of ways both at home and abroad. The solidification for these wastes has been performed using stabilization agents such as cement, paraffin and polymer. The applicability studies to maximiz…
Nanocrystalline pure and Co‐doped α‐Fe2O3 were obtained via the hydrolysis of FeCl3 in the temperature range from 90 to 95 °C under reflux condition for 8 h and the precipitate (FeOOH) is annealed at 600 °C for 6 h. The samples are characterized by various techniques. FTIR spectrum of the samples confirmed the formati…
The solubilization of multi-walled carbon nanotubes (MWNTs) had been a research goal for the past few years. Carbon nanotubes could be solubilized in different solvents to promote their potential applications in the form of polymers, copolymers, ceramics, and gasoline, etc. In this work, solubility of the functionaliz…
Individual ‘Fuyu’ persimmon fruits were packaged in different plastic films (50-µm low density polyethylene (LDPE), 50-µm polypropylene (PP)/ LDPE laminated film, 35-µm microperforated PP) to create a variety of internal atmospheres. Perforated 50-µm LDPE was also used as an atmospheric control. The fabricated package…
In the present work, the results of polyelectrolyte multilayers and hybrid multilayers, which were formed by the assembling colloidal particles and polyelectrolytes, have been presented. They are built by the alternate deposition of materials with charges of opposite signs. The kinetics of the adsorption of the materi…
Résumé. — Le rôle des caractères du cours d’eau et de la structure du paysage sur la distribution des triclades dans le haut des cours d’eau : l’exemple de Polycelis felina. — Le triclade Polycelis felina est un taxon intéressant par son rôle de bioindicateur important dans les cours d’eau et les petits environnements…
The tertiary structure of proteins can reveal information that is hard to detect in a linear sequence. Knowing the tertiary structure is valuable when generating hypothesis and interpreting data. Unfortunately, the gap between the number of known protein sequences and their associated structures is widening. One way t…
We present the mathematical modelling and the numerical simulation of the polymer extrusion process of hollow and non-hollow yarns. In particular, the polymeric material \nfow has been modelled as non-Newtonian, incompressible, isothermal and steady. We attempt to develop a possible strategy for eective die design in…
In this investigation, the microstructure of an as weld hypoeutectic Fe-Cr-C hard-facing alloy was studied using XRD and SEM technique. SEM test result showed that the microstructure consist of primary austenite dendrites with eutectic of (Fe,Cr) 7 C 3 +austenite. EDX point analysis determined chemical formula at cent…
This study aimed at optimizing impact toughness and abrasion wear resistance of 15%Cr-2%Mo hypereutectic abrasion-resistant white irons. The effects of dynamic solidification, niobium addition, combined action of them and heat treatment have been investigated. Investigations were performed by means of the image analyz…
Polypyrrole has shown potential as an electrochemically driven artificial muscle. It has also been studied as an electromechanical sensor. Despite its potential as an engineering material, its actuation and sensing behaviours have not been fully characterized and modelled. In this thesis, polypyrrole is characterized…
Presented herein is a new technique and a low cost method to estimate the ratio of air voids in hardened concrete within 30 minutes using available flatbed scanner, black inkjet, personal computer and image treatment software This test method includes contrast enhancement steps ensuring black ink (air voids) in gray c…
High velocity oxy-fuel (HVOF) sprayed tungsten carbide-cobalt (WC-Co) coatings exhibit attributes that allow them to be a candidate material for high temperature applications; such as temperature insulators for rocket nozzles. This application note investigates the effect of surface preparation, in this case the grit…
The electronic structures and optical properties of pure and Ga-doped wurtzite ZnO are studied by using first-principles plane wave pseudopotential method based on the density functional theory. The bonding of ZnO and changes in density of states are analyzed using of the crystal ligand field theory. Electron concentr…
The surface finish of tools in sheet metal forming has a large influence on the performance of the forming tool. Galling, concern of wear in sheet metal forming, is a severe form of adhesive wear w ...
한국지질자원연구원 지구환경연구본부(Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Korea)요약:비오염토양, 폐광산 주변토양, 산업단지 주변토양을 채취하여 X-선 회절분석, pH, 전기전도도, 양이온교환능력, 작열감량, 산화철․산화망간 함량, 중금속 함량 및 중금속 존재형태와 토양대자율의 상관관계를 파악하였다. 시료의 X-선회절분석 정량분석결과 비오염지역 토양에서는 모암에 따라 다양한 광물이 분포하고 있지만, 적철석과 자철석은 거의…
Hydrogen exchange mass spectrometry (HX-MS) is an experimental technique that can be used to -examine solvent accessibility and conformational mobility in biological macromolecules. This chapter summarizes studies using HX-MS to examine the regulation of conformation, protein mobility, and ligand binding to MAP kinase…