Materials Literature
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Polyamide 6,6 (PA 6,6) is widely used as a key synthetic material. However, its applications are constrained by rather low toughness. The existing methods of toughening show limited improvements and sometimes may take the sacrifice of tensile strength. In this study, we proposed a novel way, named pressure induced flo…
Residual hydrogen in the HDDR-treated Nd12.5Fe80.6B6.4Ga0.3Nb0.2powder and its effect on the coercivity of consolidated compact of the powder were investigated. Hydrogen desorption of the HDDR powder was studied by vacuum gauge and TPA. Compaction of the HDDR powder was performed by hot-pressing technique. The Nd12.5F…
The 2D problem of excitation of a circular metamaterial cylinder by a filamentary source is numerically investigated. It is found that, for the minus one values of the relative permittivity and permeability, the field on the surface of the cylinder concentrates in a region that is located on the illuminated surface of…
The thermal resistance of the contact between a metal and carbon nanotubes (CNTs) and between CNT layers is estimated by the local heating of CNT arrays (films) of different thicknesses using a focused laser beam and measuring their local temperature via Raman spectroscopy. It is demonstrated that thermal contacts bet…
Ce0.8Sm0.2O1.9 (Samaria-doped ceria: SDC) precursors were synthesized by carbon-assisted spray pyrolysis. SDC thin films were prepared by electrophoretic deposition using the SDC precursor particles. The as-prepared SDC thin films were sintered at 1600 °C for 10 h. Uniform films with a thickness of approximately 20 μm…
FePd, FePt, and CoPt alloy thin films are prepared on MgO(110) single-crystal substrates by using two different methods. One is one-step method consisting of deposition at an elevated substrate temperature of 600°C and the other is two-step method consisting of low-temperature deposition at 200°C followed by annealing…
Stainless steel exposed to gaseous tritium characteristically shows a firmly trapped fraction of tritium in the surface layer, which is not fully removable by water at ambient temperature. Prolonged thermal treatment of tritium-loaded specimens at <443 K causes substantial depletion of the bulk but almost no depletion…
Long and well-aligned ZnO nanowires were hydrothermally synthesized on FTO glass based on a ZnO seed layer which was prepared by spin-coating and annealing techniques. The effect of the growth solution refreshment on the morphology of ZnO nanowires was investigated and the possible mechanism was discussed. After refre…
In a screening test, typical traditional alloying elements for magnesium (Al, Mn, Zn, Y) were added to Mg10Gd alloy to study their influence on its corrosion resistance. The Mg10Gd1Mn alloy was identified as the most promising ternary alloy system. While addition of Gd alone disturbs the passive film formation the pre…
Cryogenic Treatment is a supplementary process for conventional heat treatment process in steel. It is an inexpensive one time permanent treatment affecting the entire section of the component unlike coatings. This experimental study investigates the effect of Cryogenic Treatment on the abrasive wear behavior of En45…
We report nano field-effect transistor (nanoFET) biosensors built from the monolithic integration of graphene and graphite. The monolithic integration enables nanoscopic field-effect detection of chemical and biological signals with mechanically flexible and robust interface with biological systems in several respects…
Sodium zirconium phosphate (NZP) is a potential material for immobilization of nuclear effluents. Up to ∼2.17 mol % (10.71 wt %) lanthanum could be loaded into NZP formulations without significant changes in the three-dimensional framework structure. The crystal chemistry of Na1+x Zr2−x La x P3O12 (x = 0.1−0.5) phases…
In this paper we propose a new method of dielectric characterization of high-k thin films based on the measurement of coplanar capacitor inserts between two coplanar waveguide transmission lines. The measurement geometry is deposed on the thin film which is elaborate on an insulating substrate. The thin film permittiv…
A different proportion of Co, Bi doping NiCuZn ferrite was synthesised by the sol–gel self-propagating high temperature synthesis method. X-ray diffraction analysis showed that the sample grain density increases with the increase in doping amount of Bi ion. The hysteresis loop at T = 300 K of the samples showed that t…
High quality indium oxide and iron doped indium oxide nanocrystalline films were prepared by the sol-gel method followed by a spin coating technique. The samples were characterized by an X-ray diffractometer, an atomic force microscopy and a UV-vis spectroscopy. All samples had good crystallinity with a preferred orie…
Thick permanent magnetic films have potential applications in magnetic microelectromechanical systems. In this paper, we systematically study the effect of deposition parameters including buffer layer, annealing condition and deposition temperature on the structure and magnetic properties of thick Sm-Co-Cu-Fe-Zr films…
In this study, we grew vertical ZnO nanorods on indium-doped tin-oxide (ITO) substrate by using an electrochemical deposition. For the growth, we used a two-step, continuous potential process without a template, additives, catalysts or a seed buffer layer. The morphological, structural and optical properties of ZnO we…
Na região sul do Brasil, foi verificada a ocorrência de forte gradiente textural em solos localizados em áreas de morros graníticos. O presente estudo teve como objetivo avaliar os processos pedogenéticos envolvidos na formação de solos em topossequência de granito em Porto Alegre (RS). Foram descritos e amostrados mo…
Ceramic samples of Bi1 − x Sr x FeO3 − δ have been investigated using X-ray diffraction analysis, Raman spectroscopy, and infrared spectroscopy. It has been shown that the spectra of these solid solutions should be considered as a superposition of resonant phonon responses of the cubic perovskite and a relaxation resp…
In this work we present optimized anisotropic mantle cloak designs working at the same frequency for both TE and TM polarizations. In addition, exploiting the properties of dual-polarization cloaking devices, we design a receiving antenna with high absorption efficiency for TM polarization and with a significant scatt…