Materials Literature
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Ge and B diffusion was studied in nanocrystalline Si, and Pd and Si self-diffusion was studied in nanocrystalline Pd2Si during and after Pd/Si reactive diffusion. These experiments showed that grain boundary (GB) diffusion kinetic is the same in micro-and nanoGBs, whereas triple junction (TJ) diffusion is several orde…
In this work, we evaluated the structural, electrical and optical properties of carbon-doped Ge8Sb2Te11 thin films. In a previous work, GeSbTe alloys were doped with different materials in an attempt to improve the thermal stability. Ge8Sb2Te11 and carbon-doped Ge8Sb2Te11 films of 250 nm in thickness were deposited on…
In order to improve the coercivity of the sintered Nd-Fe-B magnet, a Nd 13.5 Fe 79.75 B 6.75 magnet with intergranular multi-addition of 2% DyH 3 , 2% NdH 3 and 1% Nd 2 O 3 is prepared and its magnetic property and microstructure are analyzed. The results show that the coercivity of the magnet with multi-addition is a…
A pyridinecarboxaldimine grafted to silica-coated magnetic nanoparticles was prepared. The structure and magnetic properties of the functionalized magnetic silica nanoparticles were identified by TEM, FT-IR, XRD, elemental analysis, and vibrating sample magnetometer (VSM). The supported pyridinecarboxaldimine as chela…
It is shown that the anomalous sharp increasing of the strength of the near-side ridge structures observed in Au-Au collisions at s=62 GeV and s=200 GeV and the onset of the ridge structure in pPb and in pp collisions can be naturally explained in the framework of string percolation. In all the cases the near-side str…
The paper investigates the alternative dielectric gas to that of SF6. Due to the comparable properties of R-12 with SF6the authors are motivated to perform experiments to find out its utility in power apparatus. Series of experiments were performed to investigate its breakdown strength under different types of voltage…
The variety of achievable contrasts by MRI makes it a highly flexible and valuable diagnostic tool. Contrast results from relaxation time differences, which are intrinsic properties of each tissue. Using optimal control theory, one can control the obtained contrast by applying excitation pulses that bring the magnetiz…
The influence of parameters of ceramic tile covering such as covering thickness, electrodynamics characteristics, size and shape of covering cells on a reflection coefficient in a frequency band are presented in this paper. Here are the theoretical and experimental results of the dependence of the reflection coefficie…
This paper is concerned with modeling of a ductile fracture criterion for sheet metal considering anisotropy to predict the sudden fracture of advanced high strength steel (AHSS) sheets during complicated forming processes. The Lou−Huh ductile fracture criterion is modified using the Hill’s 48 anisotropic plastic pote…
The ZnO films were prepared by reactive rf-magnetron sputtering on silicon and sapphire substrates. For Cu-doping of the ZnO films, the close space sublimation method (CSS) was used at atmospheric pressure in air. After CSS processing, the ZnO and ZnO-Cu films were annealed in a wet media. The reference ZnO-Cu films,…
In this paper a textile based-metasurface is designed to have ε-negative frequency band in order to reduce the radar cross section of a PEC-plate. Parameter retrieval analysis is performed by using the magnitude and phase values, which are obtained via CST Microwave Studio. Results regarding the simulations and the re…
Recently, the developments of dielectric elastomer actuators (DEAs) increase rapidly for providing large deformations in micro-scale and bio-compatibility. They are widely used in replacing motors in various areas such as micro-robots and artificial muscles. Most DEAs are composed of stretchable materials sandwiched b…
Graphene has been an interesting discovery for the next generation electronic material due to promising thermal, mechanical, electrical, chemical and thermal properties. As a platform to RF application, graphene plays an important candidate in antenna thin film development. Thin-films use less material and the active…
In this paper, novel designs of nano antenna arrays suitable for refractive index sensing are introduced. The proposed single element design consists of a gold disk placed on top of a silica disk with the same diameter. The silica disk can be slightly radially-inward etched under the gold disk, which replicates the mu…
To investigate the electric-charging characteristics of an insulator under vacuum, a system for measuring the potential distribution on the surface of an insulator under vacuum was developed and used to measure potential distributions on smooth and rough surfaces of several glass plates. The measured potential distrib…
The purpose of this study is to investigate the effect of surface modification of volcanic ash particles on dynamic mechanical properties of volcanic ash filled polyphenylene sulfide (PPS) composites. For this purpose volcanic ash particles were modified with 1, 3, 5 vol.% of 3-aminopropyltriethoxysilane (3-APTS) whic…
A novel approach to design a miniaturized frequency selective surface (FSS) is proposed. The miniaturization is achieved by enhancing the inductance of the proposed stepped-impedance array element. This enhancement is done by using a micro-wire and controlling the path of the current which passes through the metallic…
The interfacial bonding of silicone-coated stents was characterized by field emission scanning electron microscopy and anodic potentiodynamic polarization tests.The coaxial in-lens secondary electron imaging revealed partial bonding between silicon rubber and nitinol alloy strips in both primer-treatment and plasma-tr…
Carbon nanotubes (CNTs) are strong potential replacements for silicon in VLSI due to their extraordinary capabilities. We review the theory of operation of CNT-based FETs (CNFETs), the issues regarding its modern fabrication techniques, performance parameters yielded by the latest research, and finally, we present an…
In this study, tungsten-vanadium carbide-graphite and tungsten-vanadium carbide-titanium carbide-graphite composites (W-VC-TiC-C) which can be used in high-tech equipment were investigated against different gamma radioisotopes. The composite materials were produced via mechanical alloying method in two groups; one of…