Materials Literature
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Este trabalho faz um estudo comparativo entre as velocidades de rolamento de uma esfera de aço num plano inclinado com lançamento oblíquo. Para determinar a velocidade final no plano inclinado foram utilizados cronômetros com sensores digitais, e para determinar a velocidade inicial do lançamento oblíquo foram utiliza…
According to ICNIRP guidelines for limiting exposure to time-varying electric, magnetic and electromagnetic fields up to 300GHz, magnetic flux density which range from 3Hz to 150kHz are regulated to lower than 6.25μT. In order to comply with its standard, OLEV(On-Line Electric Vehicle) have been designed considering E…
This paper presents a detailed discussion of the bending properties of laser welded web-core steel sandwich plates and the influence of weld width on stiffness and strength. The over-hanging three point bending test was conducted on the laser welded web-core steel sandwich plates with various welds width by self-desig…
It is becoming increasingly clear that methodologies for PD classification based on standard laboratory experimental data are not readily applicable when assessing on-line PD data measured in the field. It is not just that field data is corrupted by noise and disturbance, but also the significant differences between t…
Dislocation-free, vertically-aligned, and strain-relaxed InGaN nanowires were realized using metal-organic chemical vapor deposition. The indium composition is continuously tunable from 3.4 to 2.5 eV, with the latter being significant for a four-junction photovoltaic device. Growth mechanism, morphological evolution,…
Fano resonance (FR) within the transmission spectrum is demonstrated in the near infrared (NIR) region using elliptical nanoholes array (ENA) embedding through metal-dielectric-metal (MDM) layers. For the symmetric MDM-ENA, a FR that was thought to be mostly produced by the asymmetric metamaterials is excited. This FR…
Z-type hexaferrite with composition Ba3Co2Fe24O41has been synthesized using a sol-gel auto combustion technique. The obtain combusted powder was sintered at 500 OC and followed by 950 OC for 4 hrs in a muffle furnace. The effect of different sintering temperature on crystal structure, crystallite size, microstructure…
We develop farther our “three-level” approach to graphene metamaterials including “metamaterial treatment” of 2D beams of electron (BE) in graphene with 2D inhomogeneous and nonlinear electromagnetic (EM) waves in graphene-dielecric (GD) multlayered structres. This approach can lead, in particular, to the development…
The powder metallurgy (PM) nickel-base superalloy FGH96 was extruded at temperature from 1050°C to 1180°C,and the as-extruded samples in the extrusion temperature 1050°C were heat-treated at from 1000°C to 1100°C during 10min, 30min, 60min and 90min apart. The microstructure of recrystallization, γ' phase and growth b…
Abstract We fabricated highly bright and efficient inverted quantum dot (QD) light emitting by using double charge injection layer with organic electron transport material. Using organic electron blocking layer, the controlled injection of carriers was achieved by cascaded energy levels, leading to the decreasing carr…
In this paper, Au/C and Au-Pd/C catalysts were prepared respectively. The catalytic performance for the oxidation of glyoxal to glyoxylic acid has been investigated. Furthermore, these catalysts were characterized by XRD and XPS. The results demonstrate that, the conversion of glyoxal was 58.9% and the yield of glyoxy…
This paper presents the synthesis, characterization and influence of oxidizing atmosphere in the calcinations and sintering processes on microstructural properties of mixed oxides of Cerium and Zinc, obtained by the polymeric precursor method, aiming at a subsequent catalytic application. The material was submitted to…
The elemental composition of gallium arsenide-based outer emitter monolayers with oxygencesium films that have negative electron affinity is investigated via the scattering low-energy ions, along with the charge state of atoms during the deposition of cesium and oxygen. The physical mechanism for the formation of nega…
To realize enhanced optical absorption in near-infrared region in crystalline Si (c-Si) solar cells, we investigated the light trapping in photonic nanostructures fabricated on c-Si substrate by using a wet etching technique with vertically aligned Ge quantum dots (QDs). From photoluminescence excitation measurements,…
In this paper, the novel ZnO nanophosphors is synthesized by solgel method. The study exposed ZnO nanophosphors samples in Gamma (y) radiation to investigate their thermo-luminescence (TL) intensity as a function of temperature. The thermo-luminescence response has been studied in the dose range 0.291.16 kGy and it is…
Gangue as flame retardant was used to PVC, the mechanical properties and flame retardance of the samples were studied. The resultant data show that gangue little effect on the mechanical properties of the sample, especially tensile strength, yield stress, and 10% of gangue obtained good flame retardance. PVC treated w…
Abstract We report on a novel low‐cost approach for producing large format flexible RGB phosphor sheets with applications in both lighting and displays. The process can utilize any conventional down‐conversion/up‐conversion phosphor or non‐phosphor optical powder materials regardless of particle size, shape, and compo…
The wear mechanisms of conventional Ti–6Al–4V extra-low interstitial (Ti64) and the new Ti–29Nb–13Ta–4.6Zr (TNTZ) were studied to investigate the wear properties of Ti64/TNTZ for application in spinal fixation devices. Ti64 and TNTZ balls and discs were first prepared as wear-test specimens. A ball-on-disc frictional…
Plasmonics have the potential to enhance the performance of detectors. A thermal metal dewetting process was developed which can be easily scaled for high throughput production. Through this process, plasmonic nanostructures were fabricated providing broadband plasmon resonance tunable over a 1000 nm wavelength range.…
The influences of concentration of metal chelation solution, pH values, the concentration of O2 supplied by some thermal power plants in Wuxi, and the concentration of SO32- on the adsorption performance were studied. The results indicated that the removal ratio improved with the increase of bulk concentration. Howeve…