Materials Literature
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Characteristics of surface flashover in the presence of different dielectric materials have been investigated. Lightning voltage impulses (1.2/50 μs) have been applied to a rod-plane gap of 250 mm, bridged by cylindrical solid dielectrics with circular cross-section of 10 mm. The materials used are polythene, polymeth…
Copper/gelatin composite particles with controlled sizes were prepared at room temperature from cupric sulfate pentahydrate in the presence of gelatin as a protective reagent by using hydrazine monohydrate as a reducing agent. The formed particles with the size between 190-940 nm were secondary aggregated particles wh…
To systemically investigate structure–property relationship and design excellent nonlinear optical (NLO) material, the second-order NLO properties of a series of C,B -substituted carborane conjugated derivatives have been studied by density functional theory (DFT). The static first hyperpolarizabilities (βtot) were ca…
The processing characteristic of polypropylene/hemp fiber composite, at various melt-compounding temperatures between 180 and 230°C, was characterized by torque rheometry. Hemp fibers were extracted from polypropylene/hemp fibers composites (melt-compounded at 180, 200, and 230°C, respectively), in a Soxhlet extractor…
A new β-titanium alloy (Ti-3Al-5V-6Cr-3Mo-3Zr) was investigated as a function of heat treatment to evaluate its mechanical properties. The cold drawn beta-titanium alloy was subjected to β-annealing as well as solution treatment and aging treatments. The mechanical properties were evaluated using MTS Landmark-servo hy…
The management of metallic corrosion has relied on large-scale, ultra-conservative protection strategies such as the extensive use of anti-corrosion metals and alloys, all-inclusive coating and surface passivation, and substantial use cathodic protection. In the current state of knowledge, the corrosion durability of…
As carbon nanotubes (CNT) and graphene nanostructures (GNR) constitute the basis of high-speed nanoelectronics and nanosensors, we examine the fundamental properties of various CNT-metal (Me), GNR-Me, and CNT-graphene interconnects. The cluster approach based on the multiple scattering theory as well as effective medi…
Electrical Engineering should face the challenge of developing a mature approach in insulation design. Modeling charge transport and linking charge dynamics with dissipative processes responsible for electrical ageing are crucial as regards this objective. Such an approach is exemplified here for polyethylene-based ma…
Abstract In order to ameliorate the electrochemical hydrogen storage performances of La‐Mg‐Ni system A 2 B 7 ‐type electrode alloys, the partial substitution of M (M = Zr, Pr) for La was performed. The melt spinning technology was used to fabricate the La 0.75− x M x Mg 0.25 Ni 3.2 Co 0.2 Al 0.1 (M = Zr, Pr; x = 0, 0.…
Current loading of wind farm distribution network is very different from that observed for traditional underground cable systems. Variations in wind power results in a significant number of current load cycles during service. The current can increase from zero to maximum rated load in a short time. This can cause high…
Abstract The structures and second‐order nonlinear optical (NLO) properties of a series of chlorobenzyl‐o‐carboranes derivatives (1–12) containing different push‐pull groups have been studied by density functional theory (DFT) calculation. Our theoretical calculations show that the static first hyperpolarizability (βt…
Special consideration is necessary choosing materials and selecting design for dynamic cables due to the mechanical stress, sometimes in combination with a wet design, experienced by the cable. For high voltage cables (>;36 kV) this is mainly related to the required (IEC 60840) metallic water barrier and for wet solut…
Micromagnetism of dense permalloy antidot lattices from anodic alumina templates, Gawroński, Przemysław, Merazzo, Karla J., Chubykalo-Fesenko, Oksana, Asenjo, Agustina, del Real, Rafael P., Vázquez, Manuel
The specific effect of the interplay of defects such as vacancies, ripples and impurities on the electronic properties of graphene is investigated using the tight-binding Hamiltonian. While the transport gap increases with the vacancy concentration, the incorporation of impurities enhances the resonant states in the v…
The influence of the number and position of air gaps on the maximum withstand voltage of a typical 735-kV ice-covered station post insulator under DC voltage was investigated both experimentally and numerically. Numerical results obtained by the Finite Element Method (FEM) with the presence of a water film on the ice…
This paper presents a model for a theoretical maximum efficiency of a thermoelectric generator integrated with a Brayton-cycle engine. The thermoelectric cycle is presented in two configurations as a topping cycle and a preheating topping cycle. For the topping cycle configuration, the thermoelectric generator receive…
Copper–zinc–tin–chalcogenide (CZTSSe) with earth abundant elements has attracted increasing attention due to large absorption coefficient and band gap of ∼1.5 eV which is near the optimum band gap of single-junction photovoltaic devices. In this study, we used commercially available precursors to produce wurtzite Cu2Z…
Abstract The microstructures and magnetic properties of Ce 32.15 Co 49.36 Cu 9.84 Fe 9.65 magnet sintered at the temperatures ranging from 1005 to 1105 °C were investigated. The results on scanning electron microscopy and X‐ray diffraction analysis indicate that the remanence B r of the magnets is mainly influenced by…
Defect free diamond films have tremendous potential in a variety of areas including optoelectronics and have been the focus of several studies. Before diamond growth, a seeding treatment to substrate is mandatory, which itself is a source of contamination and degrades the quality of diamond. In the present study, diam…
The present work deals with the use of a carbon fiber fabric for electrochemical purposes. To carry out such investigation, suitable working electrodes of C, Pt/C and Pt/PANI/C were manufactured. Two types of electrodes were made from: Yarns pulled out from the woven textile (CYEs) and strips, 1 cm x 2 cm area, cut fr…