Materials Literature
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We address the dynamics of the solid/liquid interface of a solidifying material when the liquid phase is flowing with respect to the solid phase. To visualize the interface and independently control both the flow and the solidification conditions, we use a thin sample filled with a transparent melt. Whereas this set-u…
It is shown that quantitative information on spatial correlations in a system of polarizable particles can be extracted directly from its experimentally measurable optical spectra. For a collection of metallic nanoparticles (NPs), it is demonstrated that the degree of short-range correlation in NP's positions can be e…
Abstract Determined was quantitative effect of nickel equivalent value on austenite decomposition degree during cooling-down castings of Ni-Mn- Cu cast iron. Chemical composition of the alloy was 1.8 to 5.0 % C, 1.3 to 3.0 % Si, 3.1 to 7.7 % Ni, 0.4 to 6.3 % Mn, 0.1 to 4.9 % Cu, 0.14 to 0.16 % P and 0.03 to 0.04 % S.…
The paper present the influence of modifying process on chemical composition, microstructure, and selected properties of Mg alloys. Two sand-casting creep-resistant alloys, Elektron 21 and WE43, were analyzed in various forms: without modifiers, with the amount of modifier suggested by the producer, and with this amou…
Electromagnetic radiation emissions from partial discharges (PD) can be measured, which could be helpful for avoiding unwanted asset disconnections in the power grid for insulation evaluation. These radio-frequency (RF) measurements do not require galvanic contact with high-voltage (HV) devices, which seems to be a cl…
Single-phase Y 4 Al 2 O 9 (YAM) powders were synthesized via solid-state reaction starting from nano-sized Al 2 O 3 and Y 2 O 3 . Fully dense (99.5%) bulk YAM ceramics were consolidated by spark plasma sintering (SPS) at 1800 °C. We demonstrated the excellent damage tolerance and good machinability of YAM ceramics. Su…
Abstract The optically isotropic polymer dispersed liquid crystal (PDLC) mode has been proposed by confining liquid crystal droplets, with average sizes less than the wavelength of visible light, in polymer network. This state has been achieved via polymerization‐induced phase separation (PIPS) method in pre‐polymer/L…
Computational quantum mechanics, within the frame work of density functional theory (DFT) was used to determine the depths of impurity states created by common chemical impurities in polyethylene. Depths of traps/hopping sites were between 0.1 eV and 2.4 eV and were classified into shallow traps/hopping sites, deep tr…
In this study, a high-density polyethylene (HDPE, 5-mm-thick, 0.95 g/cm 3 ) surface was treated using an RF capacitive atmospheric pressure cold Ar plasma jet. By using this Ar plasma jet, a hydrophilic HDPE surface was formed during the plasma treatment. In particular, the effects of an additive gas (N 2 or O 2 ) on…
Abstract Blue phase liquid crystal displays (BPLCDs) have attracted considerable attention in recent years because of its many advantages. However, BPLCDs exhibit narrow temperature range, high driving voltage, and tough process. In our works, polymer‐stabilized technology using newly optimized BPLC material was appli…
The generalized ellipsometry formalism was used for a right-handed ambichiral sculptured thin film. The amplitude ratios and phase differences were calculated using an experimental dielectric function for bulk titania. The results showed that the occurrence of the circular Bragg regimes can be adduced from ellipsometr…
Nowadays, all types of electrical equipment, including cables, are exposed to various power quality effects. The harmonics are among the severe power quality problems, which can directly affect the insulating material in cables and other power system elements. Cables are costly power system elements, which deserve spe…
This paper presents an improved dynamic model based on the finite element method (FEM) for predicting AC critical flashover voltage (FOV) of ice-covered insulators during the melting period. The proposed model is implemented on the COMSOL Multiphysics™ FEM commercial software which is coupled with Matlab® for iterativ…
Abstract Unique and various microstructures of titanium oxide (TiO2) film including macroporous structure, chromatic veins and rings, have been easily fabricated by mist deposition method on silicon substrate with mild preparation conditions. Rutile phase TiO2 nanoparticles were directly used as starting material to p…
Zn 0.99 Cu 0.01 O films were studied experimentally and theoretically. The films were prepared by pulsed-laser deposition on Pt(111)/Ti/SiO 2 /Si substrates under various oxygen pressures to investigate the growth-dependence of the ferromagnetic properties. The structural, magnetic, and optical properties were studied…
Meltblown submicron fibre filter media has been produced at a production rate of a few orders of magnitude higher than that of conventional single syringe electrospinning. Fibres are produced while varying the air pressure and die-to-collector distance (DCD). The submicron fibres are about 240 nm in diameter. The aver…
The incorporation of polyhedral oligomeric silsesquioxane (POSS) into polymeric materials may result in great improvements of polymer properties including electrical dielectric properties. However, the success of achieving such a material with improved properties relies on a proper dispersion and distribution of POSS…
Calculating the current rating of HVDC cable systems is less straightforward than for ac cables, which are always thermally limited. While the permissible current in an HVDC cable circuit may be limited by the operating temperature of the dielectric, it may also be restricted by the electric stress within the dielectr…
This study reports the fabrication and characterization of a metal-oxide-based supercapacitor with a high surface area 3D microelectrode. This microelectrode is comprised of high aspect ratio SU-8 pillars that are fabricated using backside exposure and coated with alternating Ni and Cu layers via a sequential electrod…
This review concerns the behavior of a new class of LC composites with physical networks. These composites are prepared through the addition of some low-molecular-mass compounds (gelators) containing various functional groups to liquid crystals. In the medium of liquid crystals, gelators can form gels via non-covalent…