Materials Literature
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The difference in corrosion inhibition behavior of imidazole deposited on iron by two different methods has been examined using electrochemical impedance spectroscopy (EIS), x-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Adding imidazole directly into the aqueous corrosive medium has b…
Cubic-phase zirconia nanoparticles modified with univalent surface cations have been prepared through a low-temperature solvothermal method. The obtained products were characterized by powder X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). The surface of the nanoparticles has also…
In the context of electron emission from surfaces, the area efficiency of emission (α) is defined as the ratio of the effective area of high-density emission (called the notional emission area) to the apparent area of an emitting sample as judged by its geometrical size (called the macroscopic area). For practical lar…
Coprocessing behavior of mixtures of high density polyethylene (HDPE) and deoiled cakes of Jatropha and Karanja was studied by thermogravimetric analyses under dynamic conditions in the presence of nitrogen atmosphere and compared with those of individual materials. Experiments were carried out in the temperature rang…
The utilization of coconut fibers as reinforcement in polymer composites has been increased significantly due to their low cost and high specific mechanical properties. In this paper, the mechanical properties and dynamic characteristics of a proposed combined polymer composite which consist of a polyester matrix and…
We investigated the geometric and electronic properties and doping efficiency of phosphorus-doped zinc oxide nanowires along the [0001] direction using the first-principle calculation. For isolated point defects, the substitutional and vacancy defects prefer the edge of the nanowire, the Zn interstitial defects favor…
Nanomaterials have been demonstrated as useful tools for molecular imaging, molecular diagnosis and targeted therapy in biomedical research. The main advantages of such nanomaterials are improved circulation times, precise targeting, enhancement of dissolution rates and enhanced contrast. A challenge and opportunity f…
The preparation and properties of novel calcium aluminosilicate glasses containing both nitrogen and fluorine are reported. Nitrogen increases Young's modulus and microhardness of oxide glasses by ∼25%. However, one of the major disadvantages of the use of oxynitride glasses for high‐stiffness applications is the fact…
Partial Discharge (PD) off- line and on-line measurements are required to prevent early failures on low voltage induction motors fed by inverter drives. Conventional methods use commercial digital scopes to visualize simultaneously the waveform of the applied impulsive voltage and the acquired PD pulses, as well as ap…
We report magnetic and superlattice imaging of ferrimagnetic bilayered ${\text{LuFe}}_{2}{\text{O}}_{4}$ with strong uniaxial magnetic anisotropy. Magnetization reversal is imaged in magnetic fields up to 8 T at several temperatures below ${T}_{N}$ $(\ensuremath{\sim}230\text{ }\text{K})$ and charge-ordered superlatti…
We investigated the dustiness (the propensity of a material to generate airborne dust during its handling) of various nanomaterials, including carbon nanotubes and metal oxides, by the vortex shaker method. The number concentrations and size distributions (∼10->10 000 nm) of aerosol particles released during agitation…
Aluminum‐containing ternary carbide, Al 4 SiC 4 , was successfully synthesized using a mixture of Al(OH) 3 , SiO 2 , and phenolic resin by a carbothermal reduction process without any posttreatment. In addition, the processing parameters were optimized in this study. Unlike the JCPDS pattern of Al 4 SiC 4 , the powder…
We have studied the temperature dependences of the so-called charge and orbital ordering reflections in the neighborhood of the Verwey transition by means of resonant x-ray scattering at the Fe K and L edges on a high purity single crystal of magnetite. Contrary to recently published results [J. E. Lorenzo, Phys. Rev.…
One dimensional (1D) ZnO heterostructures were deposited on C-plane sapphire using metal organic chemical vapor deposition at atmospheric pressure. Both catalyst-assisted and catalyst-free processes were investigated. In this latter case, growth parameters such as the substrate temperature, the oxygen/zinc ratio, or t…
γ -AlON : Er 3 + phosphors with different Er3+ concentration for upconversion luminescence were prepared by a combination of carbothermal reduction and nitridation and solid-state synthesis methods. The effect of Er3+ content on emission spectra was investigated. Under the excitation of 980 nm diode laser, green emiss…
Results of studies in the field of electrochemical composition coatings (ECC) are presented. Methods of synthesis, functional properties, and structural peculiarities of the main types of ECC are considered.
This paper describes an investigation of the corrosion behavior of Cu37Zn brass in borate buffer solutions at various pH, with and without the addition of chloride ions. The results lead to the conclusion that the anodic current densities depend on pH and chloride ions. The current density increased in pH interval fro…
Performing measurements is an essential part of understanding physical phenomena. Hence, numerous measuring techniques have been developed to study space charge build-up in dielectrics. This macroscopic accumulation of charge modifies the electric field and can lead to aging and premature failure of electrical insulat…
Carbon nanotubes (CNTs) have exceptional physical properties that make them one of the most promising building blocks for future nanotechnologies. They may in particular play an important role in the development of innovative electronic devices in the fields of flexible electronics, ultra-high sensitivity sensors, hig…
The fabrication and structure characterization of ZnO nanorod-TiO2 nanotube hybrid arrays are reported. ZnO nanorods were electrodeposited onto the TiO2 nanotubes to form nanorod-nanotube hybrid arrays. Scanning electron microscopy showed that the ZnO nanorods were tightly grown together with TiO2 nanotubes. And the a…