Materials Literature
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The Split Hopkinson pressure bar (SHPB) test method, which is composed of three cylindrical bars, measuring devices and frames, is known for its reliable technique of acquiring the mechanical properties of specimens under a high strain rate. This paper demonstrates the processing of design and fabrication of SHPB. Fir…
The transport properties of half-metallic ferromagnetic Heusler alloys Co2 MeAl (Me = Ti, V, Cr, Mn, Fe are transition 3d metals) have been measured in the temperature range of 4–900 K. The specific features of the behavior of the resistivity have been considered in the framework of the two-current model of conductivi…
The effect of added electrolyte on the viscosity behavior of 3–9 wt% cellulose nanocrystals (CNC) suspensions was investigated for three different grades of CNCs extracted from wood pulp with sulfuric acid at increasing hydrolysis temperature. The viscosity of aqueous CNC suspensions decreases significantly when small…
In this study, boric acid and antimony oxide were used as auxiliary flame retardant materials accompanied by huntite and hydromagnesite. To avoid the deteroriation of mechanical properties, a reduced additive amount is required in polymer composites, and it can achieve improved flame resisting properties. The use of f…
This paper reports for the first time the reinforcement of kappa-carrageenan (ĸCRG) with clay of halloysite nanotubes (HNT) as potential biomedical materials. The bionanocomposite films (ĸCRG/HNT) were successfully prepared having optimum tensile properties at 3 wt% of HNT. Morphological and surface analysis of the na…
By means of pulse current heating (3–5 μs), specimens of a new highly oriented pyrolytic graphite (the highly annealing pyrolytic graphite, HAPG) within the temperature range 2500–5000 K were investigated. The temperature, electrical resistance (compared to the initial sizes), and Joule energy of heating were measured…
Extruded cable systems and accessories are key components within the area of power transmission systems. Taking into account that the number of high voltage direct current (HVDC) transmission solutions is continuously increasing the role of its components and insulating materials becomes more and more important. In ad…
One of the important disadvantages of the silicone rubber insulators is the ageing caused by its exposition to pollution and environmental factors such as UV, rain, and temperature. The degradation can be highly dependent on the quality of the compound used in the manufacturing of the insulators. Moreover, the quality…
The mid-infrared (MIR) spans the 3 – 25 µm wavelength range. Rare-earth-ion doped selenide-chalcogenide glasses are being developed for direct-emission MIR fibre lasers. The true Pr3+absorption cross-section in the 3.5 – 6 µm wavelength region of a Pr3+-doped (500 ppmw of Pr3+i.e. 9.47×1019 Pr3+ions cm−3) GeAsGaSe hos…
Conventional subwavelength grating concentrating lenses are designed based on calculated phase overlap, wherein the phase change is fixed by the grating thickness, bar-width, and airgap, and therefore the focus. We found that certain concentration effects can still be maintained by changing the grating thickness with…
Large deposits of unusual black talc interstratified with dolostone layers of the late Neoproterozoic Dengying Formation were discovered in Guangfeng County, Jiangxi Province, southeastern China. The black talc ore exhibits primarily oolitic structures and consists mainly of talc (30–70 wt%), dolomite, and quartz, wit…
Summary The mechanism of how and when an arcing short or a physical short occurs on a polyvinyl chloride (PVC)‐insulated cable when exposed to radiant heat flux has been found experimentally. How this mechanism acts on the size of the resulting arc beads is also considered. As a physical short usually changes into an…
The Al–C–N films are deposited on Si substrates by using a dense plasma focus (DPF) device with aluminum fitted central electrode (anode) and by operating the device with CH 4 /N 2 gas admixture ratio of 1:1. XRD results verify the crystalline AlN (111) and Al 3 CON (110) phase formation of the films deposited using m…
In this paper, we present the results of a comparative study of breakdown voltage of CO2, N2 and SF6 gases, and CO2-SF6 and N2-SF6 mixtures under different types of voltage namely AC, DC and lightning impulse voltage in a sphere-to-sphere electrodes arrangement. The equivalencies between breakdown voltage of SF6 and t…
We have synthesized two novel phthalocyanines, (m-SF[Formula: see text]PhO)[Formula: see text]PcCu (7b) and (p-SF[Formula: see text]PhO)[Formula: see text]PcCu (7c), in order to investigate their flying-seed-like mesomorphism. Their phase transition behavior and the mesophase structure have been established by using a…
In this present study reports the green synthesis of zinc oxide nanoparticles using Betel leaf extracts and zinc acetate. The functionalization of ZnO particles through Betel leaf extract mediated bio reduction of ZnO was investigated through X-ray diffraction, Field emission scanning electron microscopy, photolumines…
Electrical properties of low-threshold field emission cathodes produced by growth nanocluster graphene films on the pointed surface of heavily doped n +SiC by sublimation epitaxy have been considered. The quality of the graphene coating has been assessed based on the morphological studies and Raman spectroscopy. Using…
We show how fibre/matrix interface (or interphase) modification can be used to develop a range of novel carbon fibre reinforced polymer (CFRP) composites that open up new applications far beyond those of standard CFRPs.For example, composites that undergo pseudo-ductile failure have been created through laser treatmen…
The paper discusses nonlocal elasticity theories among which are models of media with defect fields, gradient elasticity theories, and hybrid nonlocal elasticity theories. Gradient theories are analyzed, and their correctness properties are examined. Applied theories that satisfy the correctness conditions are develop…
Samples of detonation nanodiamonds modified during the synthesis by adding doping elements in various ways have been studied by spectroscopic methods (electron paramagnetic resonance, Raman scattering, and X-ray diffraction). For the first time, the presence of P1 centers in detonation nanodiamond crystals has been in…