Materials Literature
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Abstract The glide of an ensemble of edge dislocations at the high-speed deformation of an aged binary metal alloy is theoretically analyzed. The yield stress of the alloy is a nonmonotone function of the second component concentration, which has a maximum and a minimum under certain conditions. The maximum correspond…
Epoxy resins are the most used polymeric systems when it comes to high voltage insulations. Their excellent electrical and mechanical properties in combination with the ability to withstand high thermal stress are what makes them so appreciated. During usage, partial discharges (PD) can occur in high voltage machines,…
Abstract Electron paramagnetic resonance (EPR) spectra of Ce3+, Yb3+, Cr3+, and Gd3+ impurity ions in yttrium aluminum garnet Y3Al5O12 (YAG) ceramics were detected and identified at frequency of 94 GHz. The advantage of measuring the EPR spectra in the high-frequency range compared to the standard EPR technique is sho…
A hybrid nanocomposite composed of polyaniline-polystyrene-chitosan/zinc oxide was prepared via a simple in situ polymerization method. The synthesized copolymers were analyzed using Fourier Transform InfraRed (FT-IR), and UltraViolet-Visible (UV–Vis) spectroscopies, ThermoGravimetric Analysis (TGA), and Field Emissio…
Interface Modification Engineering In article number 19000162, Qiuhong Cui, Yanbing Hou, and co-workers construct perovskite solar cells with discrete SnO2 nanoparticle-modified layers by spin coating the SnO2 dispersions on PEDOT:PSS. The discrete SnO2 nanoparticle film lets holes pass and block electrons to diffuse…
The increasing of load will cause the increasing stress that experienced by the equipment which this stress causes deterioration in the equipment insulation, and eventually will causes a breakdown. One of the stresses faced by insulation is thermal. In this study, epoxy resin will be combined with one type of inorgani…
In this paper, acoustic emission in audiosonic range of air corona discharge was detected by using fast Fourier transform (FFT). A microphone was employed to record the acoustic signal of corona that was generated by using a needle-plane electrode with air gap. A high frequency current transformer (HFCT) sensor was us…
Dielectric spectroscopy and DC conduction current of Polyesterimide (PEI) -based nanocomposite filled with low concentration, 1.5wt.%, of SiO2nanoparticles of about 10nm mean size have been performed and analysis in comparison with the unfilled PEI. The permittivity and dielectric loss of the nanocomposite were found…
The spacer is a challenging part of high voltage direct current (HVDC) gas-insulated switchgear (GIS) and gas- insulated transmission lines (GILs). Based on the charge adaptively controlling strategy verified by our previously published papers, this paper serves as an important step towards further industrialization o…
Power transformers require high insulation reliability. Insulation oil is widely used in power transformers because of its high insulation performance, low dielectric constant, heat transfer constant, and so on. Many studies have aimed to enhance the characteristics of insulation oil to make it more reliable. Nanoflui…
Optical interferometer acoustic sensors for GIS partial discharge detection are proposed in recent years. However, the stability of the sensing system for actual apparatus PD detection is less of a concern, especially for actual GIS. In this paper, an optical fiber acoustic sensing system based on Michelson interferom…
Nanomaterials (NMs) have wide applications in industrial and household areas, and possibilities of exposure to NMs are increasing, prompting considerable concerns about safety issues related to them. This paper describes the research landscape of nanotoxicity over the past ten years by adopting bibliometric methods. A…
This work introduces a novel method of integrating a force feedback system for a gripper actuated by a Shape Memory Alloy (SMA) spring actuator which is actuated by external heating. The targeted application of this gripper mechanism is to be used in a Minimally Invasive Surgical (MIS) tool since there is a need of mi…
The effects of hydrothermal production conditions on crystal forms, morphology and electrochemical performance of in situ reduced graphene oxide/manganese oxides (rGO/MnOx) hybrid electrode materials were studied. The XRD/SEM results show that the ratio of precursors, reaction temperature and type of solvent significa…
Glutathione-capped gold nanoclusters display polyanionic properties that are manifested in the interaction with cationic species. The nanoclusters form complexes with doxorubicin with effective dissociation constant about 10 µM that increased by an order of magnitude in the presence of 0.15 M NaCl confirming electrost…
We reported preliminary study about dried nata de coco for extend the shelf life of fruits We made nata de coco by mixing coconut water and adding Acetobacter xylinum. Nata de coco was dried and compacted with hot press. The design of nata de coco as an absorbent of water made similar to the design of silica gel. Mois…
Aspects of the structural formation and properties of (FeCo)100−xVx alloys (x = 0; 1.5; 3.0; 4.5; 6.0) after torsion under high hydrostatic pressure in a Bridgman chamber at different temperatures (77 and 295 K) and different numbers of revolutions of the movable anvil (from 0.5 to 6) are investigated via X‑ray diffra…
Abstract Over the past decade, nanotechnology caused the need for rigorous research on ultrafine nanomaterials which enhance productivity and quality of agricultural products. However, most studies are controversial; it is difficult to compare doses of nanoparticles and types of plants. In the experiment, nanoparticle…
This paper reports estimates of leakage currents based on thermal images (infrared) of polymer isolators using color detection methods. In this study, laboratory pollution performance tests using sodium chloride and kaolin were carried out in accordance with the IEC 60507 standard with AC high voltage at 18kV. The sev…
This paper is focused on the preparation of the magnesium composite materials by extrusion of the chemically treated powders. Microstructures with partially preserved borders between particles containing specific elements depending on the preparation method were created by extrusion. Compressive mechanical properties…