Materials Literature
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The single isolate vacancy in diamond exists in three charged states, neutral, negative and positive; and many complicated defects such as di-vacancies, impurities-vacancy complexes could also be formed in diamond. In this paper, we investigate the optical properties of the irradiation-induced neutral vacancy in diamo…
Due to high-power fi ber lasers and fi ber-coupled thin disk lasers, the application fi elds of high-power lasers continue to expand, especially for laser processing in automobile, aircraft, and train industries. Based on current applications, laser applications for nuclear technology also show promise because nuclear…
Time delay estimation (TDE) is a well-known technique to investigate poloidal flows in fusion plasmas. The present work is an extension of the earlier works of A. Bencze and S. Zoletnik 2005 and B. T´al et al. 2011. From the prospective of the comparison of theory and experiment it seem to be important to estimate the…
Molecular dynamics simulations of polyethylene/silver-nanoparticle composites are implemented to calculate the structures, electrical, thermal and mechanical properties, thereby investigating their relationships with the nanoparticle dimension and simulation temperature. The results show that polyethylene/silver-nanop…
The influence of polymer environment on the luminescent properties of barium zirconate nanocrystals has been studied by cathodoluminescence (CL) spectroscopy. It was found that a polystyrene (PS) shell around the BaZrO 3 nanocrystals significantly modifies the CL spectra. This phenomenon can be explained by interactio…
Piezoelectrets are made from cellular polypropylene(pp)foam sheets by using a pressed-gas expansion followed by corona charging process. The elastic modulus, piezoelectricity and the acoustic response of such fabricated films are investigated. The results show that the Youngs modulus in the thickness direction is more…
In this paper, we simulate and experimentally validate a polarization-independent transmission absorption metamaterial absorber based on electromagnetic resonance. The metamaterial absorber can absorb the high-frequency electromagnetic wave, and the low-frequency wave can transmit through the absorber. The tested resu…
The structural and electronic properties of β-SiC/(15, 0) carbon nanotube (CNT) and β-SiC/(16, 0)CNT core-shell structure are studied by using first-principles method based on the density functional theory. The results show that the two heterostructures are metallic. Their metallic properties are contributed by the at…
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Using a long-distance microscope imaging system and a lock-in phase integrate technique, optical measurements demonstrate that the evolutional behaviors of a phospholipid-shelled micro-bubble, a kind of ultrasound contrast agent, under two ultrasound frequencies and different pressures. Dozens of frames of an oscillat…
The structures and the hydrogen storage capacities of the B6 clusters and the lithium decorated B6 clusters are investigated by using the density functional theory. The results show that the hydrogen is adsorbed in the atomic form by chemical bonds in the three possible structures of the B6 cluster. The lithium atoms…
ABSTRACT. The conversion of glucose into platform chemicals such as 5-hydroxymethylfurfural, levulinic acid and formic acid has been investigated using two aluminophosphate based zeotypes (SAPO-5 and MeAPO-5) catalysts in 1-butyl-3-methylimidazolium chloride [BMIM]Cl ionic liquid as a reaction medium. The silico alumi…
In the paper, we propose a new nucleation rate function, which combines grain size, and models for nucleation and growth of voids in a ductile polycrystalline metal. The proposed model is used to analyse the effects of grain size on the dynamic tensile damage of high purity Cu samples with different grain sizes. Numer…
In the current work considering the wave model of the crystal growth control, an influence of heterogeneity of the medium on the forming martensite crystal s profile was examined. The considering of the heterogeneity is provided with the help of putting into operations the space-depending effective attenuation of the…
Due to global lean exhaust gas and new emission regulations, exhaust aftertreatment systems of diesel engines are more and more sophisticated and composed of a series of catalytic units. In the present work, two of these catalytic systems were studied with different approach. A model diesel oxidation catalyst (DOC), u…
The deformation behavior and structural changes in the copper (99,8% Cu) and electrical bronze (Cu-0,09% Cr-0,08%Zr) subjected to the dynamic channel-angular pressing are investigated. The properties and thermal stability of the obtained nanostructured state are studied.
This chapter gives an overview of the fascinating gyroid and gyroid-like surfaces, which are found in nature as intermaterial dividing surfaces. The single- and double-gyroid surfaces in particular will be discussed. In order to visualize these gyroidal structures the concept of a level surface will be introduced and…
The optimization problem of shield (protective plate) structure having given thickness and consisting from several layers is considered. It is supposed that these layers are made from different materials with given properties. The order and thicknesses of layers are determined from the condition of maximization of bal…
Three different particle sizes were used to deposit FeAl and Fe3Al intermetallic coatings by thermal spray techniques: flame spraying and HVOF (High Velocity Oxygen Fuel). Coatings were characterized by SEM (scanning electron microscopy) and their characteristics are presented considering particle size and deposition…
Equations of state (EOS) are proposed for a system involving argon and consisting of a perfect solid and a perfect liquid composed of single spherical molecules in which Lennard–Jones interactions are assumed. Molecular dynamics simulations of this system were performed to determine the temperature and density depende…