Materials Literature
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The trivalent chromium coatings were deposited on the pure aluminum substrate using a thin zincates interlayer. Zincates has considerably influenced in the formation of trivalent chromium deposit on the pure aluminum substrate. The plating temperatures, plating times and different pH ranges had significant effects on…
The same sherd was analyzed using a scanning electron microscope with energy dispersive spectroscopy (SEM-EDS) and a micro X-ray fluorescence tube attached to a scanning electron microscope (Micro-XRF-SEM) to compare the effectiveness of elemental detection of iron-based pigment. To enhance SEM-EDS mapping, the sherd…
Polycrystalline ceramic samples of pure and Cu +2 doped Bi4V2-xCuxO11(x=0.0 and 0.02) have been synthesized by standard solid state reaction method using high purity oxides. The dielectric constant and dielectric loss and hence ac conductivity as a function of frequency and temperature have been measured. The dielectr…
Background: Composite resin is a combination of filler and matrix. The additional of fiber in the composite resin has a function as load-bearing in mastication. Polyethylene fiber has been used as a reinforced to receive the forces on the fixed denture fiber reinforced composite (FRC). Purpose: The purpose of this stu…
To evaluate the immunities of biodegradable microsphere as a release delivery system for DNA vaccine against Infectious Bursal Disease Virus, in our study, silk fibroin/chitosan microsphere adjuvant was prepared with a precipitation/coacervation method. Both glutaraldehyde and Na2SO4 solution were used in cross-linkin…
In this experimental study, the glass fiber reinforced polyurethane composite is prepared and the Tensile, Flexural and Impact Strengths are analyzed.Currently the glass fiber is manufactured with other resins such as epoxy, vinylester and polypropylene. These composites are used as sports goods, automobile bodies, et…
The synthesis of strontium metastannate (SrSnO3) has been performed by coupling mechanical activation with thermal activation of SnC2O4-SrCO3 mixtures. The solid-state reaction has been studied by TG-DSC analysis and powder X-ray diffraction. By annealing experiments performed on physical mixtures (no mechanical activ…
A integridade de um material metálico, submetido a determinadas condições físico-químicas que favoreçam o crescimento de microrganismos, pode ser comprometida pela presença de biofilmes em sua superfície. Os métodos mais comuns aplicados para controle da biocorrosão e formação de biofilmes são: boas práticas de limpez…
The mechanism for the effects of pressure on the magnetic properties and the martensitic transformation of Ni—Mn—Sn shape memory alloys is revealed by first-principles calculations. It is found that the total energy difference between paramagnetic and ferromagnetic austenite states plays an important role in the magne…
In order to develop miniaturized and integrated electron vacuum devices, the electron beam modulation in a field-emission (FE) electron gun based on carbon nanotubes is researched. By feeding a high-frequency field between the cathode and the anode, the steady FE electron beam can be modulated in the electron gun. The…
The estimation of PM eddy current loss in fractional slot PM machines (FSPMMs) is of great importance since it is closely related to the prediction of their efficiency. This issue turns to be critical accounting for the FSPMMs capability to achieve a wide speed range. The paper is devoted to a 3D FEA-based investigati…
A new type of high precision electromagnetic suspension (EMS) which can support heavy tray along long stroke rail is proposed in this paper. Compared with the conventional EMS, the suggested moving-core typed EMS has the levitation electromagnets (EMs) on the fixed rail. This scheme has high load capability caused by…
Series of Fe-site–substituted K0.8Fe1.75−xMxSe2 (M = Cu, Ni, Mn, Zn, Co, Cr) single crystals of nominal composition have been prepared and microstructural features have been studied. Systematic Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) investigations reveal that the substitution eff…
Polycrystalline Cadmium sulfide (CdS) films were deposited onto Corning glass substrates from alkaline solutions containing CdCl2, KOH, Na3C6H5O7 and CS(NH2)2 at different deposition times (10, 20, 30, 40 and 50 min), different bath temperatures and different concentration of the reactants. A comparative study was per…
Oil-filled ring main units (RMUs) are considered to pose a medium to high medium risk due to the severity of failure consequences and the ageing population. The obvious solution is to institute a network wide replacement program of oil-filled RMUs with the newer types of RMUs. However, a replacement program covering t…
Currently, one of the most popular methods for the production of reticulated porous ceramics (RPCs) is the polymer sponge method, which was invented by Schwartzwalder and Somers. SiC RPCs can be fabricated by using the A12O3-SiO2 as sintering aids at low temperature as 1200-1300 °C in cases with SiC (20-50 % (mass per…
A physical mechanism for the topological transformation of a two-layer system confined by two substrates is proposed. Initially the two horizontal layers, A and B, are on top of each other, but upon a sufficiently large disturbance, they can rearrange themselves through a spontaneously propagating sectioning to create…
This paper investigates the tensile properties and the morphology of the fractured surface of the biomimetic composite scaffold material which is used to fabricate the scaffold that grows the hard tissue like substances. Morphology of the fractured surface was analyzed under scanning electron microscopy (SEM).
Neste trabalho estudou-se a perda de massa de revestimento duro aplicado pelo processo de soldagem com arame tubular com a variação de energia de soldagem, gás de proteção e número de camadas do revestimento. Com arame tubular autoprotegido de liga Fe-Cr-C-Ti foram depositados cordões sobrepostos na formação de camada…
Maintaining a power supply with exquisite power quality level involves the frequent monitoring of electrical parameters from the load side as well as the source side. Neglecting the common power quality issues can lead to huge amount of losses, from the equipment downtime point of view as well as in terms of economy.…