Materials Literature
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In this study the effect of Fe for Ni substitution in Ni44Co6Mn39Sn11 metamagnetic shape memory alloys on their structure, magneto-structural transformation characteristics, magnetic and magnetocaloric properties was studied. The results show that the structure and martensite transformation behavior strongly depends o…
The program Jana2006 allows the solution and refinement of regular, twinned, modulated, and composite structures against different diffraction data sets. Recently a new option for solving and refining magnetic structures from powder and single crystal neutron diffraction data has been developed.
Molecular dynamics simulations were performed to analyze the curvature-driven shrinkage of individual cylindrical grains with geometrically different boundaries in Al. Grains with <100> tilt and mixed tilt-twist boundaries with the misorientations 5.5°, 16.3°, and 22.6° were simulated. The results revealed that…
Laser irradiation effect on the optical band gap of Se-Te-Al thin films has been studied. Optical data Analysis of thin films indicates indirect allowed transition in the Se-Te-Al system. Analysis of the result reveals that the optical band gap decreases with increasing irradiation time as well as Aluminum content. Ho…
In this paper, the effect of nature and preparation method of two different functionalized graphenes on the dielectric properties of Low Density Polyethylene (LDPE)/Graphene composites was investigated. The first type of composites contains only a single additive, a multilayer graphene purchased from an industrial sup…
Blending of polyethylenes permits to combine the superior mechanical properties of high-density material with the higher purity that is associated with low-density resins. Mixing different polyethylene architectures offers a lot of advantages, but for electrical applications it is important that there is no detrimenta…
First-principles calculations based on density functional theory were performed to study the effect of alloying on the thermodynamic stability of MgH2 hydride (rutile and fluorite structures) with transitional metals (TM=Sc, Ti, Y) and group IIA elements (M=Ca, Sr, Ba). The results indicate that fluorite structure of…
Li-doped ZnO thin films were prepared by sol-gel method and deposed on glass substrate using spin coating technique. The effects of Li on structural and optical properties were investigated. The X-ray diffraction (XRD) analysis reveals that Li incorporation leads to the great improvement of the crystalline quality of…
Abstract The relationship between structure and upconversion performance of four anthracene‐based acceptors, named as anthracene (An), 9,10‐diphenylanthracene (DPA), 9,10‐di(naphthalen‐1‐yl)anthracene (DNACl) and 9,10‐di(naphthalen‐1‐yl)anthracene‐2‐carbonitrile (DNACN), doped with Pd(II)tetraphenylporphyrin (PdTPP) w…
Effect of synthesis parameters on the characteristics of expanded graphite were studied. The starting sample, intercalated graphite, was treated by several methods: thermal shock (400, 1000°C) and programmed heating (400–700°C). The samples were examined by scanning electron microscopy, energy-dispersive spectroscopy,…
Electrical tree break-down is the major failure problem in cable accessories, however, mechanisms of the electrical tree initiation and propagation are still lack of deeply research, especially in silicone rubber (SIR) which is widely used as insulation material for cable accessories. Long-term aging (0– 1000 h) exper…
High-voltage design optimization requires a fundamental understanding of electrical breakdown mechanisms under different stress situations. The impulse withstand voltage is normally used as dimensioning criterion for medium voltage air-insulated systems as flashover mechanisms in air are rapid. Prediction of withstand…
The diffusion of nanoparticles immersed in semidilute polymer solutions is investigated by a hybrid mesoscopic multiparticle collision dynamics method. Effects of polymer concentration and hydrodynamic interactions among polymer monomers are focused. Extensive simulations show that the dependence of diffusion coeffici…
In present study, this paper describes the fabrication of Ba 1-x Ni x TiO 3 (X=0, 0.05, 10) nanomaterial's synthesized by chemical route sol-gel method. Their structural, optical and dielectric properties have been investigated as a function of sintering temperature. Dielectric measurements of the sintered sample were…
The paper is devoted to the development of a process of tubes extrusion from MgCa08 magnesium alloy. For optimization of extrusion process the Qform software was used. The numerical model of flow stress and fracture criterion for MgCa08 were obtained based on tension/compression measurements performed in a universal t…
One pot in-situ co-precipitation of chitosan-Fe3O4 nanoparticles as a candidate of drug delivery agent have been synthesized using combination of tripolyphosphate (TPP)/citrate as cross-linkers. The aim of this study was to determine the effect of preparation process towards chitosan-Fe3O4 nanoparticles characteristic…
Recently authors have proposed damage equalization method with step-stress tests for quick estimation of life exponent of power equipment insulation. Traditional constant-stress accelerated ageing tests for insulation are disadvantageous since outliers in sample data will always be there and some samples may not fail…
This paper deals with electrical insulation properties of hydrocarbon-based thermosetting resin that is tricyclopentadiene resin (TCP resin)/dicyclopentadiene (DCP resin) copolymer in comparison with those of conventional epoxy resin. To meet the needs of high heat resistance and high-voltage resistance to electrical…
The technological processes were explored for the manufacture in an autoclave of a space ship heat shield. A mathematical model was created for the determination of the duration of the impregnation of the binder for the composite material. The change in the Nitrogen content is dependent on the time in the autoclave. T…
The use of energy harvesting for supplying wireless sensors becomes a new market opportunity. During lasts years, new low power transmitters, and also power conversion ICs specifically designed for energy harvesting, have become commercially available. However, as any other power supply circuit, the specific load beha…