Materials Literature
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Based on an analytical model proposed in our early work, a design approach for synthesizing AMMs with desired properties has been proposed. The proposed approach provides an iterative steps to calculate the area and the perimeter of the inclusions for requested medium. As the iterations proceed, the smaller range of p…
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
Here we analyze in detail the concept of surface cloaking, showing that a patterned metasurface covering a given object may provide drastic scattering reduction, at the level of recently developed bulk metamaterials cloak, but with the advantage of thinner, lighter, cheaper and arguably simpler technology, and most si…
A high purity gold composed of coarse grains (d = 1.7 mm) was repeatedly thermo-mechanically processed by multi directional forging (MDF) at room temperature and annealing at warm temperature range. The effects of small addition of Ca (180 at. ppm) to Au on the static recrystallization (SRX) behavior and ultrafine gra…
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
Three different types of electromagnetic cloaks are studied for their ability to cloak metal objects from an electromagnetic pulse. It is shown by numerical full-wave simulations that, at least in the studied cases where the cloaks' diameters are smaller than a half of the wavelength, the transmission-line cloak and t…
In this paper, the SCT is applied for the global electromagnetic simulation of a finite-size and thick waveguidecell FSS illuminated by an oblique incident plane wave. Preliminary results under normal incident plane wave have been presented by the authors in. The FSS plays a key role in many antenna systems for modern…
In this paper, it theoretically discussed the TM electromagnetic plane wave scattering characteristics of a periodic array filled the aperture with a semiconductor illuminated with the light at double its period on a dielectric slab. It theoretically explained about the necessary plasma density to change the effective…
Only hexagonal close-packed (h.c.p.) materials show creep behaviour significantly at ambient temperature or less even below their 0.2% proof stresses with their stress exponents of 3.0 and their apparent activation energies of 20 kJ/mol. Transmission electron microscopy revealed dislocation arrays as a planar slip wit…
Structural and luminescent properties of UV emitting ZnAl2O4powder was studied. It was found that the firing temperature above 1000οC was necessary to prepare the ZnAl2O4single phase. The CL intensity became stronger according to increase of firing temperature, because of improvement of crystallinity of the powders. T…
Melt spinnable silicone resin with a low carbon content was spun to fiber form with an averaged diameter of 16.8 m. When the resin fiber was cured by SiCl4 vapor and pyrolyzed at 1273K in inert atmosphere, Si-O-C fiber with smooth surface was obtained. The measured tensile strength was relatively low. The fiber, howe…
Zinc oxide (ZnO) thin films were deposited on glass substrates at room temperature using direct current (DC) magnetron sputtering technique. The deposition pressure was varied from 12 mTorr to 25 mTorr. The influence of the deposition pressure on structural properties of the ZnO films was investigated using atomic for…
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
The Co75Fe4.2Si8B12Nb0.8 amorphous wires of 30 μm in diameter are produced by melt extraction and annealing at 450 °C for 20 min in vacuum with a longitudinal or transverse field of 40 kA/m. Distances between the two voltage contacts of 6, 5, 4 and 2 mm are obtained by moving the two voltage contacts towards the centr…
Radon activity in slate mines in the aravali range in Haryana was measured to protect the occupational workers and general public from radiation. The alpha sensitive LR-115 type II plastic track detectors (solid state nuclear track detectors) were used for the measurements. Results of various measurements of the radon…
Modern interconnect structures are exposed to high mechanical stresses during their operation. These stresses have their sources in interconnect process technology and electromigration. The mechanical properties of passivating films and the choice of process technology influence electromigration reliability. In this p…
Experimental data on the evaporation kinetics of saturated K 2 SO 4 solution drops and the nucleation kinetics of the first crystals are used to develop a simple procedure for the calculation of the solution concentration and the number, size, and dispersity of growing crystals. The calculation results agree well with…
Highly dense bulk samples were produced by spark plasma sintering (SPS) through combined devitrification and consolidation of partially amorphous Al 85 Y 8 Ni 5 Co 2 gas atomized powders. The microstructure of the consolidated samples shows a mixed structure containing crystalline, ultrafine-grained and amorphous/nano…
A bulge test device has been built, with the aim to perform mechanical tests on membranes with a thickness in the 100 nm to 10 μm ranges, between room temperature and 900 °C. Our set up a differential atmospheric pressure is applied across a membrane, while the deflection is measured using a laser interferometer. We s…