Materials Literature
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Highly-ordered TiO2 nanotube arrays were successfully fabricated by electrochemical anodization of titanium. The morphology of TiO2 nanotube arrays, the length and pore size were represented by field emission scanning electron microscopy (FE-SEM). The parameters of various anodization including F- concentration, react…
INTRODUÇÃO: Os métodos de soldagem mais utilizados em Odontologia não podem ser aplicados ao titânio puro e às suas ligas em função da alta reatividade do titânio com elementos atmosféricos; dessa forma, o mesmo não deve ser soldado por processo comum. OBJETIVO: O objetivo deste trabalho foi avaliar a característica m…
A series of Si (100) based LaB6films were deposited by D.C. magnetron sputtering with different argon pressure, one of the most important deposition parameters, which affect both the structure and properties of the thin films. XRD, AFM, Raman, and Hall measuring instrument were used to characterize the film structure…
A time- and cost-effective fabrication process for uniformly well-ordered anodic alumina templates was newly suggested. Pre-textured nanopatterns on aluminum sheets as the pore initiation site were fabricated by using soft lithographic methods and selective inductively coupled plasma etching. Then, only a one-step ano…
Abstract Bei den Überbauten der Schleusenbrücke Iffezheim wurden nach über 30jährigem Betrieb deutliche Korrosionsschäden an der Bewehrung im Inneren der Hohlkästen infolge eingedrungener Chloride festgestellt. Statische Untersuchungen zeigten, dass bereits entstandene Schädigungen durch vergleichsweise einfache Verst…
Ultradispersed powders of metal copper obtained by evaporation-condensation technology are investigated. It is shown that, depending on the evaporation rate, various dispersities and degrees of agglomeration of copper powders are attained with the conservation of the weight fraction of copper in them no lower than 99.…
Most of the applications of semiconductors involve either photon absorption to form free carriers (photodetectors or solar cells) or the formation of photons by free carrier recombination (light emittiing diodes or lasers). Both kinds of applications require high quality single crystals having desirable dimensions, de…
A new kind of microsphere filler was synthesized with octyltrimethoxysilane (WD13) and tetraethoxysilane (TEOS) by sol-gel method. The morphology of the filler was measured by TEM. The so synthesized spheres were added into the silicone rubber. Both the strain-stress and the water contact angle of the silicone rubber…
The paper discusses the results of studying the influence of commutator working surface roughness and hardness on the rate of bar wear. The obtained dependences describe the effect of impact machining variables on bar surface roughness and surface layer hardness. The conditions for impact machining (IM) commutator cop…
We describe a new method for selecting design variables for shape optimization of high-voltage gas circuit breaker using a Kriging meta-model and a genetic algorithm. Firstly we sample balance design variables using the Latin Hypercube Sampling. Secondly, we build meta-model using the Kriging. Thirdly, we search the o…
Mixed acid processed Multi-walled carbon nanotubes （MWCNTs）were used as adsorbent to adsorb Cu2+ in artificial wastewater in this . In this study, the effect factors of Cu2+ adsorption capacity, such as initial concentration of Cu2+, absorbent contact time and dosage, etc were investigated respectively in the solution…
Secondary ion emission from an ion-bombarded binary compound in the ferro- and paramagnetic states has been studied using experimental methods and molecular dynamics simulations. The experiments were performed with a widely used NiPd binary compound, which was bombarded by obliquely incident 10-keV Ar ions. It is esta…
Numerical simulations are employed to consider the problem of determining the granular temperatures of the species of a homogeneous heated granular mixture with a power-law size distribution. The partial granular temperature ratios are studied as functions of the fractal dimension D, the restitution coefficient e, the…
MnO2 nanoparticle was produced using liquid coprecipitation method, CNT was produced using microwaveplasma chemical vapor deposition(MWPCVD). SEM and EDS were used to examine the morphology and the elements of the samples. The diameter of MnO2 particle is about 300nm. And the CNT sample has a diameter about 10~20nm an…
Chitin/chitosan, a naturally renewable resource, have unique functional properties including biocompatibility, biodegradability, and non-toxicity, which have been widely applied in many fields, such as food, agriculture, medicine, materials, etc. Chemical method is commonly employed in extracting chitin/chitosan in Ch…
Cadmium oxide (CdO) thin films were deposited on quartz glass substrates by pulsed laser deposition from ablating Cd metallic targets. The effect of grain size on structural and optical properties of CdO thin films was studied in detail. The structural properties were determined by XRD and a cubic phase was present in…
A device for measuring high-TC superconducting transition temperature in a small cryocooler is described which allows a samples temperature to fall steadily from room temperature to 45K. This cryocooler not only meets the high-TC superconductors measurement requirements, but also yields accurate measurement results un…
The isothermal solubility of the ternary system K+,Mg2+/B4O72-—H2O at 25°C has been studied and the phase diagram is determined. The results show that the system is of the simple eutonic type and can be in metastable equilibrium state within 8—16 hours. The phase diagram consists of two solubility branches correspondi…
A method that uses overlapping calibration wedges, made from the materials being investigated and placed alongside an object, is proposed for calculating the individual thicknesses of two-component objects. On detectors separated by an absorber, images in two different ranges of X-ray hardness are recorded with a sing…
The effect of rare earth element on structure and mechanical properties of 2205 duplex stainless steel were studied by metallographic examination, scanning electron microscope (SEM), tensile test and impact test. The results show that the proper amount of rare earth can refine microstructure of 2205 duplex stainless s…