Materials Literature
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Green composite or bio-composite refers to a type of composite materials that consists of natural fibres and bio-polymers as its constituents. The green composite has generated great interest in research world and industries due to its advantages of renewability, biodegradability and sustainability. However due to its…
This paper focused on the epoxy resin/inorganic filler composites. The electrical and thermal properties of the composites were tested and analyzed at room temperature. The influence of temperature on the thermal conductivity and thermal expansion coefficient was studied. Based on the electrical and thermal properties…
Представлен обзор металлических композиционных материалов на алюминиевой и титановой матрицах, упрочненных высокопрочными волокнами тугоплавких соединений для использования в конструкциях авиационной техники и космических транспортных системах.
Abstract Quench cracking is a brittle fracture phenomenon, and its occurrence depends not only on the stress changes but also on the mechanical characteristics of metals. Simulation of quenching processes has become possible in the analysis of quench cracking. This article commences with a discussion on the studies co…
With the increasing need of transmitting electrical energy over very long distances, combined with necessary space saving installations, the focus is more and more shifted to DC operated gas insulated systems. Their insulation system is nearly uniform, hence well-known problems, like space charge accumulation and meta…
Graphene has become an outstanding material for revolutionary wireless applications in the microwave and terahertz/infrared frequency ranges. Due to its unique physical characteristics, a family of completely new devices can be developed by exploiting graphene's behaviour as High Impedance Surface (HIS) or highly-Reac…
Performance evaluation of the polyester composites with added carbon nanotubes is presented herein, based on the results of compressive tests. Composites were obtained from polyester resin mixed with three types of carbon nanotubes: singlewall, multiwall and functionalized. The contents of carbon nanotubes were 0.1, 0…
Abstract Sheets of Mg-4Er (wt.%) alloy were prepared by multi-pass hot rolling and subsequent annealing. The annealed sheets could be cold-rolled to a high reduction of 95% (corresponding to a rolling strain of 3) by one-pass rolling at room temperature. The evolution of the deformed microstructure of Mg-4Er alloy was…
We prepared BiFeO3 (BFO) thin films on Pt(111)/Ti/SiO2/Si(100) substrates by using a chemical solution deposition method and then annealed in Air, N2 and O2 atmospheres. Improved electrical properties were observed in the BFO thin film annealed in a N2 atmosphere. The leakage current density of the BFO thin film annea…
An existence of an electrostatic force which draws the particle in the direction of increasing field was indicated by FEM analysis. An approximate formula of the electrostatic force was derived analytically and compared with the results of FEM analysis. This force is sufficiently large to be relevant to particle motio…
To solve more and more serious electromagnetic radiations, electromagnetic wave absorption cement were prepared by introducing carbon black and glass fiber as composited absorbing reagent, wich can be useful in building anechoic chamber and other electromagnetic radiation protection to buildings. The results showed th…
Nanomaterials decorated with polypyrrole were synthesized using two types of oxidants by chemical oxidative polymerization method. The interaction and influence of the addition of single-walled carbon nanotubes (SWCNTs) and titanium dioxide (TiO2) nanoparticles in polypyrrole (PPy) were studied using Fourier transform…
We propose an electrically controllable terahertz wave modulator based on a metamaterial and vanadium dioxide (VO₂) thin film. A square loop shape is designed to play the roles of both a resonating metamaterial and a heater to electrically control the conductivity of VO₂. The transmission characteristics of the modula…
Abstract The choice of heat treatment depends on the service requirements of a given bearing and how the bearing will be made. This article describes the design parameters, material characteristics required to sustain performance characteristics, metallurgical properties, and dimensional stability. It also provides a…
Characterization of the conductive current associated with XLPE, found in power cables requires HVDC power supplies with very stable voltage output. The very low conductivity has led to an increased need of a more accurate measurement technique to characterize the conductive parts of dielectric materials. Commercial H…
The prequalification test of 500 kV XLPE cables and accessories has been successfully finished at CEPRI(China Electric Power Research Institute)in partnership with two cable & accessory manufacturers, HANHE and VISCAS. The prequalification test program was aimed at assessing, for the first time in China, the long-term…
Novel biorenewable castor oil-based polyurethane (PU) thermoset has been prepared via environmentally friendly aqueous dispersion with no organic solvent. Thin film of castor oil-based PU was obtained via solvent casting method of the aqueous dispersion. Dielectric spectroscopy of the PU thin film was investigated at…
A water strider's floating mechanism is of significance for the design of new biomimetic robots. However, the explanation of this mechanism has not been fully comprehended due to a lack of effective experimental methods. We describe a novel transmission speckle correlation technique, which is used to determine the def…
The resonance excitation of an intense elastic wave in a crystal, arising under conditions of the nonspecular reflection of an incident pump wave is described for a crystal geometry close to a cut that allows the existence of a bulk eigenwave satisfying the free boundary condition. It is shown that choosing a crystal…
Carboxyl-terminated, water soluble, hyperbranched polyesters (HBPET) with aliphatic-aromatic structure were synthesized at three different monomer mole ratios (A 3 /B 3 = 1: 1, 2: 1, 1: 2, respectively) by melt polycondensation of aconitic acid and phloroglucinol via A 3 + B 3 approach. Fourier transform infrared (FTI…