Materials Literature
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Wear resistance is the important characteristics of cast iron materials for automobile components. Because the phenomenon of wear is a highly complicated mechanism involving many factors such as surface conditions, chemical reactions with lubricants, metals, and physics, it has not been fully explained. Therefore, it…
This paper presents the results of research on creating composites using the DEG-1 water-soluble epoxy resin cured by polyethylenepolyamine. It was shown that the obtained composites, in which quartz sand or Portland cement were used as the filler, have high damping properties, rigidity, and bending compressive streng…
A simple oxidative polymerization of pyrrole (Py) directly onto the surface of iron (Fe) microparticles was applied to increase the content of carbon in resulting material. Detection and quantification of the PPy (polypyrrole) coatings obtained were performed by means of pyrolysis gas chromatography (Py-GC). A powder…
In this paper, nanocrystalline VO2 thin film is fabricated by a kind method of two steps and its phase transition characteristics are investigated. The two-step method contains low-temperature reactive ion sputtering and post-annealing, and its process parameters determine the phase transition properties of fabricated…
Silica microspheres coated by nanoZrO2 were prepared by the sol-gel process using butoxidesolution (TBOZ) as precursor. The nanomicrospheres were formed via hydrolysis and condension reaction of metal alkoxides with the hydroxyl (-OH) of silica microspheres by form Zr-O-Si bonds. The samples were characterized by X-ra…
A new model based on least square support vector machines (LSSVM) and capable of forecasting the hardness of Cu-3Ti-1Cr alloy has been proposed. Data mining and artificial intelligence techniques were used to examine the forecasting capability of the model. In order to improve predictive accuracy and generalization ab…
A low ripple, compact, high-voltage DC power supply suitable for vacuum system applications is proposed. The design proposed in this paper applies multi-leveling of the Greinacher circuit. By multi-leveling the outputs of several stages the overall ripple and voltage drop are reduced significantly. In addition, the de…
Different doping concentration Al-doped ZnO nanofibers were synthesized by Atom Layer Deposition (ALD) using PVP fibers as template. The influence of Al doping concentration on the structure and optical properties of nanofibers was investigated. The samples were characterized by means of X-ray diffraction spectra, fie…
A photoacoustic technique is being investigated for application to intracellular drug delivery. Previous work [Chakravarty et al., Nat. Nanotechnol. 5, 607–611 (2010)] has shown that cells immersed in nanoparticle-laden fluid underwent transient permeabilization when exposed to pulsed laser light. It was hypothesized…
Three Mn(II) complexes of [MnL(Bipy)(H2O)] n (I), [Mn3(Phen)2(HL)2(L)2]n (II), and [Mn(Phen)2(HL)(OH)] (III), where L = 4,4′-(2-acetylpropane-1,3-diyl)dibenzoic acid, Bipy = 2,2′-bipyridine, and Phen = 1,10-phenanthroline, were hydrothermally synthesized and characterized by single crystal X-ray diffractions, infrared…
Vascular tissue engineering is dependent on achieving both tissue strength and contractility. Proliferative, synthetic smooth muscle cells (SMCs) are necessary for producing strong, engineered vascular tissue; however, in vivo, healthy SMCs are quiescent and contractile. In this study, we evaluated the effects of cult…
The synthesis of graphene using chemical vapor deposition (CVD) on patterned Cu thin films was studied. A series of experiments were carried out to optimize the CVD process of graphene synthesis on Cu thin films and the optimal growth conditions were obtained. Consequently, few-layer graphene which had been characteri…
It has been shown that stringent requirements on permeability and permittivity are needed for surface waves to exist on the surface of the vacuum and the medium made from negative-index materials (NIM). In this paper, we theoretically analyzed the transverse magnetic modes on the surface of a finitely thick NIM plate,…
Mixed-metal cyano-bridged compounds GunM1.5-n[Fe (CN)6]·xH2O(M=Ni, Gu) have been prepared by co-precipitation. The magnetic results show that the compound Cu0.75Ni0.75[Fe (CN)6]·xH2O is ferromagnetic, undergoes a paramagnetic to the ferromagnetic transition temperature at 21.77 K. The paramagnetic curie temperature θ,…
In this manuscript, we report the simulation of electronic structures of TiO2 doped with Ag using first-principles calculation, based on the density functional theory (DFT) The mechanism to improve the visible-light photocatalytic activity for TiO2 doped with Ag. EF was displaced into the valence band (VB), narrowing…
We have fabricated white organic light-emitting diodes (OLEDs) by co-doping of red and blue phosphorescent guest emitters into the single host layer. Tris(2-phenyl-1-quinoline) iridium(III) [Ir(phq)3]and iridium(III)bis[(4,6-di-fluorophenyl)-pyridinato-N,C2`]picolinate (FIrpic) were used as red and blue dopants, respe…
The magnetic and electrical properties of Co/Ge bilayer films are experimentally studied. It is established that at the Co/Ge interface an intermediate magnetic layer forms. This layer affects the magnetic behavior and magnetoresistive effect in the investigated structures.
The corrosion mechanism of organic silicon modified polyurea composite coating under different CO2partial pressures was studied using high-temperature autoclave, combined with scanning electron microscopy (SEM), adhesion tests and electrochemical impedance spectroscopy (EIS) technology. The experimental results showed…
This article presents a design and fabrication method of a embedded cavity using alumina casting-belt. This method is based on HTCC (high-temperature co-fired ceramic) MEMS technology with using fugitive materials. The test structures are fabricated using two different fugitive materialsPolyimide film and ESL4900 film…
Huygens' surfaces are two-dimensional metamaterials (metasurfaces) that impart arbitrary phase shifts on light passing through them. These reflectionless surfaces provide new beam shaping, steering, and focusing capabilities. They are realized with spatially varying, two-dimensional arrays of polarizable particles tha…