Materials Literature
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Poly (N-isopropylacrylamide) (PNIPA)-clay nanocomposite hydrogels (NC gels) having small patterns of several hundred micrometers were prepared by photoinitiated radical polymerization with the use of a patterned photomask. The irradiated region of the obtained gels became more opaque than the masked region at temperat…
The fatigue life of austenitic stainless steel is significantly reduced in the environment of a pressurized water reactor (PWR). One of the methods for evaluating the environmental effect involves the use of the environmental correction factor (Fen) determined from the fatigue lives of the material in air and the PWR…
High-temperature oxidation behavior of Fe-Ni-Cr alloys with different Ni contents in air and steam at 700°C was investigated. Oxidation mass gain in steam was higher than that in air. In both atmospheres oxidation mass gain tended to decrease with increasing Ni content. However, the Ni concentration dependence of oxid…
The corrosion is a natural phenomenon which affects the productivity and safety of men and machines. Since the mild steel has wide application in almost all industries, and is more prone to corrosion, particularly in acid medium, the present work aims to study the corrosive behavior of mild steel in 0.1N H2SO4 medium…
Stepwise transient (SWT) and pulse transient (PT) methods are experimental techniques for measuring the thermal diffusivity and conductivity of solid materials. The contribution deals with some interesting aspects of the methods. The first is devoted to the study of the influence of the thermal resistance caused by th…
This study presents the influence of ethylene glycol dimethacrylate (EGDMA) as a crosslinking agent through electron beam crosslinking process. Therefore, the effects of EGDMA on irradiated low density polyethylene/sepiolite (LDPE/SEP) nanocomposites on the tensile and thermal properties at 4 part per hundred resin (p…
In this paper, a novel decoupling control method based on generalized inverse system is presented to solve the problem of SHAPF (Shunt Hybrid Active Power Filter) possessing the characteristics of 2-input-2-output nonlinearity and strong coupling. Based on the analysis of operation principle, the mathematical model of…
The dynamic nature of molecular materials are functional due to their nonlinear optical properties. Nonlinearity arising due to intermolecular interactions as self assembling phenomena between organic and metallic nanoparticles is of interest. The insight of this phenomena is attributed both by experimental and quantu…
In this work, barium titanate, BaTiO3 (BT) and Zr doped BT, BaZrxTi1-xO3 (BZT) with powders were successfully produced using the soft combustion method. Barium nitrate and titanium (IV) isopropoxide were used as the starting materials while zirconium (IV) oxynitrate hydrate as the doping precursors, and glycine as the…
In this paper, we propose an improved new methodology in energy conformation problems for finding optimum energy values. First, we construct the Bezier surfaces near local minimizers based on the data obtained from Density Functional Theory (DFT) calculations. Second, we blend the constructed surfaces in order to obta…
As magnetic material has magnetic hysteresis characteristics, there is a problem that gives an error in current sensor output. So it is important to clarify the influence of magnetic hysteresis phenomena in current sensor. The object of this paper is to propose a method in consideration of a magnetic hysteresis in a F…
Изучены эффекты зарядки диэлектрических мишеней при облучении электронами средних энергий в сканирующем электронном микроскопе. Установлены существенные различия кинетики зарядки для исходных образцов и образцов, предварительно облученных электронами и ионами. Эти различия объясняются радиационно-стимулированным дефек…
Light extraction efficiency (LEE) is a very important factor for improvement in efficiency by Light Emitting Diodes (LED). As of now, most LEE improvement methods involve complex fabrication either on the finished LED chip or during the LED processing. In this study micro repeating structures (MRS) are fabricated usin…
We developed a new strategy of optofluidic analysis from inkjet-printed droplets on photonic crystal biosilica-diatom at nanoliter scales. The hydrophilic diatom surface could concentrate target molecules in the liquid droplets as the solvent evaporates, which enables 2,4,6-trinitrotoluene (TNT) detection down to 2.7×…
In the article, the results of the study of behavior of timber slab under influence of fire with the standard “time-temperature” curve are presented. The finite element method was used for it. For the calculation we constructed a grid models of timber slabs. As a result of solution of the thermal problem was obtained…
The solubility of aluminum sulfate in sulfuric aqueous solution was determined and analyzed thermodynamically. Aluminum sulfate dissolved in sulfuric acid aqueous solution not spontaneously, because the dissolution enthalpy is a positive value. The solubility of aluminum sulfate had a temperature dependency and hardly…
The electronic structure and elastic properties of the ternary layered carbide V3GeC2 were investigated by the first-principle plane-wave pseudopotential total energy calculation method based on density functional theory. It is found that the computed P63/mmc lattice constants and internal coordinates are a = 2.9636?,…
Plastics as packaging materials and coatings undergo increasing demands globally each year. This pose a serious problem to the environment due to its difficulty to degrade. One solution to addressing the problem of plastic wastes is the use of bioplastics. According to the European Organization Bioplastic, one of the…
Aragonite CaCO3 with complicated morphologies needle-like structrues have been successfully synthesized through dolomite as raw materials by the decomposition of urea. The phase of the aragonite whiskers were characterized by X-ray diffraction and Fourier transform infrared, the structrue of the samples was characteri…
镁及其合金因其具有在生物体内的可降解性、较好的生物相容性和优异的力学性能，因而被广泛研究应用于生物体的植入器件。然而，其过快的腐蚀降解速度以及由局部腐蚀导致过快的力学性能丧失等问题极大地限制了镁及其合金在临床中的应用。因此，本文利用液相沉积的方法在纯镁表面构建一层氨基三甲叉膦酸涂层。通过扫描电子显微镜(SEM)、傅立叶红外分析(FTIR)、X射线能谱仪(XPS)、电化学测试(PDP)以及长期浸泡实验对涂层进行表征。实验结果表明：氨基三甲叉膦酸涂层通过共价固定和螯合沉积的方式有效地构建在纯镁表面，暂态以及长期浸泡过程中明显提高了材料的耐腐蚀性能，且抑制了镁基体的局部腐蚀，增强了材料在长期服役过程中的稳定性。 Magnesium an…