Materials Literature
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Because of its combined characteristics of metals and ceramics, such as low density, high Young’s modulus, thermal and chemical resistance with low hardness, high electrical and thermal conductivity, it was expected that the introduction of Ti3SiC2 to fiber reinforced ceramic matrix can make the composite own some uni…
Synthesis and characterization of new polymer electrolytes for electrochemical applications is one of the topics of current research. In this work, polymer electrolytes are prepared by blending two polymers Polyvinylalcohol (PVA) and Polyacrylonitrile (PAN) of different compositions by solution casting method using DM…
We designed a tunable metamaterial in the terahertz frequency domain (0.1 – 1 THz) based on periodical arrays of metallic resonators on top of vanadium dioxide thin films deposited on a sapphire substrate. We simulate and show experimentally that the frequency response of the fabricated metamaterial is drastically cha…
The formation of microstructure and substructures in the rims of railroad wheel pairs by plasma treatment is investigated. The hardening of the surface layer in plasma quenching is largely due to the formation of nonequilibrium metastable structure that is practically amorphous in the surface zone. This structure is t…
In the past few years gas insulated high voltage circuit breakers have improved considerably, in particular with respect to required drive energy for operation, compactness and reliability. A further reduction in size implies increasing operational field stress inside the breaker and, thus, a reduction in built-in saf…
Fir flour/SiO2 hybrid material (FSHM) was fabricated by Sol-gel infiltration process. The morphology and structure were investigated by Fourier transformed infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The composites of polyamide-6 (PA6) reinforced with FSHM were prepared by melt-mixing in twin…
The use of composite, in particular, multilayer materials, is one way to decrease the specific quantity of metal in an item and to increase its service characteristics. To develop methods for the diagnostic of the state of such composite materials and their components, the effect of cold rolling on the structure, magn…
The degradation of agro-industrial waste-based particle boards reinforced with sugar cane bagasse was evaluated by comparing their physical and mechanical properties. The particle boards were prepared with sugar cane bagasse particles (85% by weight of composite) and mixed with bi-component polyurethane resin based on…
Polyhydroxyalkanoates (PHAs) are polyesters synthesized by numerous bacteria as an intracellular carbon and energy storage compounds in the cytoplasm of cells. To cut down the cost of production and optimize the PHA/dried cell weight different concentrations (1, 2 and 5 %) of refined glycerol and a crude glycerol from…
Magnetic resonance imaging (MRI) is a tremendous modality for noninvasive cell tracking. To this end, superparamagnetic iron oxide (SPIO), one of the MRI contrast agents, should be labeled to the cells before transplantation. Currently, cellular labelling with SPIOs such as Feridex and Resovist is generally carried ou…
Abstract We have synthesized a series of single-composition emission Na 2 Sr 2 Al 2 PO 4 Cl 9 :Ce 3+ phosphor by traditional solid state reactions and novel combustion method. Formation of compound was confirmed by X-ray diffraction analysis. The photoluminescence (PL) emission spectra were observed at 376 nm when exc…
Plasma electrolytic oxidation (PEO) is a promising and environmentally friendly surface modification process free of Cr+6 and heavy metals. The process forms a protective and well adhered ceramic coating on valve metals such as Mg, Al and Ti. In this study, AZ91D and AM60B Mg alloys commonly used in automotive and aer…
Spin-wave resonances have been observed in superlattices arising due to the phase separation and self-organization of charge carriers in Eu 0.8 Ce 0.2 Mn 2 O 5 single crystals. The resonances are found within the 5–80 K temperature range at frequencies close to 30 GHz. Similar resonances with intensities about an orde…
A software for the calculation of diffraction elastic constants (DEC) for materials both with and without preferred orientation was developed. All grain-interaction models that can use the crystallite orientation distribution function (ODF) are incorporated, including Kröner, Hill, inverse Kröner, and Reuss. The funct…
BACKGROUND: The potential use of magnetic nanoparticles in biomedical applications has witnessed an exponential growth in recent years. METHODS: In this study, we used nanoaggregates of magnetic nanoparticles as carriers for controlled drug delivery. The nanoaggregates are formed due to the presence of the block copol…
The frictional performance of several rubbers after pulsed-DC plasma treatments has been examined. In all cases, the treated rubbers showed better performance than the corresponding untreated ones. Stronger treatments, in terms of longer process time and/or higher substrate bias voltage, led to larger reductions of co…
Abstract Hydrothermal syntheses of the magadiite, a layered silicate structure, were conducted in the presence of a heteroatom source (SnCl 4 . 5H 2 O) with the intention of investigating its influence on the resulting material, as well as the possibility of isomorphous replacement of Si by Sn atoms in the abovementio…
Effect of Surfactant (Triton X-100) Concentration on Dispersion and Functionalization of Multiwall Carbon Nanotubes Prabhsharan Randhawa1, Jin-Soo Park2 ∗, Sandeep Sharma1, Pawan Kumar1, Mun-Sik Shin2, and S. S. Sekhon1 ∗ 1Department of Physics, Guru Nanak Dev University, Amritsar-143005, India 2Department of Environm…
Adsorption and subsequent polymerization of nickel(II) complexes with Schiff bases were studied in a porous carbon material used to manufacture electric double-layer capacitors (supercapacitors). The optimal modification conditions of the carbon material with polymeric complexes to obtain the maximum effect as regards…
The mechanism of image drift in the observation of a boundary between a metal and an insulator by scanning electron microscope (SEM) is clarified by electron-trajectory simulation and experiment. In the region involving a straight boundary between a large-area metal layer and an insulating substrate, the largest image…