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。
The grazing incidence interaction of a 10-keV electron beam with a planar surface of plexiglass is studied experimentally. Moreover, the electron passage through flat channels formed by such surfaces is investigated. The experiments reveal the presence of a guiding effect of the electron passage as in the case of a gl…
The effect of gold (Au) nanoparticles with an average size of about 2 nm on double-stranded DNA cholesteric liquid-crystal dispersion (CLCD) particles has been studied. Treatment of DNA CLCD by Au nanoparticles results in two effects: a “disturbance” of the spatial structure of dispersion particles and the induction o…
BACKGROUND: Proliferation and migration are the two main processes of intimal hyperplasia: the primary cause of intermediate and late vascular graft failure. Low-molecular-weight heparins (LMWHs) inhibit these processes on vascular smooth muscle cells (VSMCs) in animal models, but have failed to improve patency of vas…
Efficient organic light emitting diodes with an electroluminescent layer composed of the blends of p-type and n-type organic semiconductors, which undergo nanoscale phase separation to form a bulk heterojunction with percolated hole and electron transport channels, are reported.
This paper is the first investigation on the effect of flow control methods on the part load performance in a spark ignition engine. For comparison of the methods, two control devices, port throttling and masking, were applied to a conventional engine without any design change of the intake port. Steady flow evaluatio…
Biodegradable containing composites are increasingly present in several industries, mainly because they are renewable but also for their engineering properties. Despite environmentally friendliness has become an issue of paramount importance, the use of natural fibers has some limitations, especially when high tempera…
This work is focused on the phase transformation from amorphous calcium phosphate (ACP) to nanostructured hydroxyapatite (HA) or tricalcium phosphate (TCP). Amorphous calcium phosphates with Ca/P molar ratio near 1.67 and 1.5 were synthesized by wet-chemical precipitation method and treated with ethanol. Upon thermal…
A alumina é um material muito estudado devido às suas excelentes características refratárias e propriedades mecânicas. A fase α, mais estável, tem uma temperatura de formação de ~1200 °C. Devido à sua elevada temperatura de formação, muitas pesquisas vêm buscando sua redução através da adição de sementes (seeds) da fa…
The transient heat conduction equation was used as the microscopic model of the Tian-Calvet microcalorimeter. It was verified by comparing simulated and experimental calorimetric curves and used to guide sample cell design for a faster response time, for which it gave the guidelines to minimize the heat flow distance…
Abstract ZnO microspheres were hydrothermally synthesized using triblock copolymer Pluronic F127 as a crystal growth modifier. The ZnO microspheres were composed of nanorods assemblies. The ZnO nanorods with a diameter of less than 100 nm were radially grown from the center in all directions. A possible growth mechani…
Submerged electric arc discharge in liquids has shown to be a promising method for synthesizing a wide variety of nanomaterials. However, it requires an accurate current stability control to ensure the desired purity and structure of the products. The discharge stability control through light emission has been previou…
This paper deals with the eddy current loss reduction in a surface mounted permanent magnet synchronous machine. Numerical solution based on 2D finite elements method is used to compute eddy current losses in the permanent magnets. This calculation is integrated in an optimization process by genetic algorithm which ai…
The barrier properties of self-forming barrier are sensitive to the thickness, annealing temperature, annealing time, and impurity concentration of itself. In this paper, the properties of Cu/CuMn/ SiO2bilayer structures were investigated, and an optimized thickness of Cu and CuMn alloy used as barrier layers in these…
The possibility of low-temperature oxidation of a solid carbonized coal residue in a mixture of NH 4 NO 3 and supercritical water (723 K and 30 MPa) is shown for the first time and its mechanism is described. Conjugate processes of oxidation of the carbonized residue and formation of combustible gases H 2 and CH 4 cau…
Samarium doped ZnO (Sm:ZnO) thin films were deposited onto glass substrates by spray pyrolysis. The Sm:ZnO thin films were annealed in various atmosphere such as air (ambient), oxygen and nitrogen. A number of techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, UV-vis…
Properties of the low-calcium alkali-activated materials (AAMs) made from the metakaolin, waste glass and sand were tested in this research. Specimens with dimensions 40x40x160mm were prepared. The correlation between development of microstructure and concentration of NaOH solution used for preparing of the AAMs was o…
Summary Based on specific interactions taking place between poly(N,N‐dimethylacrylamide) [PDMA] and silica nanoparticles, two strategies were used to improve the viscoelastic properties of aqueous formulations. First, PDMA oligomers were grafted onto a non‐adsorbing poly(acrylamide‐co‐sodium acrylate) backbone. With t…
Magnetic properties of samples of austenitic steel ChS-68 cut from the cladding of a fuel element, which was irradiated in a BN-600 fast-neutron reactor to a maximal damage dose of ∼80 displacements per atom (dpa) at temperatures of 370–587°C, have been investigated. It has been established that irradiation with fast…
New materials are being developed for architectural and design purposes. The recycling of waste is presented as an opportunity for new applications based on increased industrial waste and raw material shortages. Seeking an alternative to wooden panels, regional waste without sustainable disposal is being used as input…
Magnesium alloys have emerged as potential structural materials with all capabilities to even replace close contenders; aluminium alloys in weight-critical applications. High susceptibility to corrosion being the only limitation, corrosion of magnesium alloys continues to gather much attention among the material scien…