Materials Literature
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The microstructure and electrochemical properties of the Al-1Mg-0.1Sn-0.1Ga-xBi alloys were investigated by means of SEM/EDAX and electrochemical measurements, the self-corrosion was tested by using the gas-collecting method. The results show that element Bi in alloys is mainly segregated along the grain boundaries. T…
This work studies the temperature-driven ferroelectric phase transition of ferroelectric polarization under the absence of electric field. The modified Heisenberg model in three dimensions was considered and simulated via Monte Carlo simulation. The Metropolis algorithm and the periodic boundary condition were employe…
The nature of the ferromagnetic (FM)-paramagnetic (PM) phase transition at changes from first order to second order when the average crystallite size, d, falls below 100 nm in optimally hole-doped nanocrystalline La 1− x Ca x MnO 3 . In zero field, the systems with d < 100 behave as a three-dimensional (3D) uniaxial d…
In order to complete the research on the Fe–Se binary system, the phase structures with selenium contents from 50 to 60 at.% have been studied. Fe–Se binary samples used in this study were prepared by the high-temperature solid-state reaction method, and the phase structure of each sample was determined by powder X-ra…
Kyropoulos (Ky) method is the most suitable technique for the growth of high‐quality sapphire single crystal for substrate applications. Cracks are often observed in the grown ingot that significantly reduces industrial productivity. In the paper, cracking causes are analyzed by examining crystal shape, thermal stress…
The momentum relaxation time of a photoexcited graphene in the THz frequency range has been studied by using terahertz time domain spectroscopy under optical pumping at room temperature. It is found that the momentum relaxation time of the graphene as a function of the optical pumping intensity exhibits a threshold be…
The preparation and electrical properties of diamond nanocones are reviewed, including a maskless etching process and mechanism of large-area diamond conical nanostructure arrays using a hot filament chemical vapor deposition (HFCVD) system with negatively biased substrates, and the field electron emission, gas sensin…
Superhydrophobic surfaces have received considerable attention in recent years. The surface has a strong water-repellent characteristic that could produce slip flow and drag reduction. The coating traps air within its micropores, such that a submerged moving body experiences shear-free and no-slip regions over, respec…
In this study, atomistic simulations are performed to study the effect of Al solute on the behaviour of edge dislocation in Mg alloys. After the dissociation of an Mg basal edge dislocation into two Shockley partials using molecular mechanics, the interaction between the dislocation and Al solute at different temperat…
Nakagomi and Kokubun (pp. 1738–1744) investigated the micro-structure of β-Ga2O3 thin films formed on c-plane and a-plane sapphire substrates prepared by gallium evaporation in an oxygen plasma. Cross-sectional transmission electron microscopy (TEM) images and electron diffraction patterns were obtained from a cross s…
The ferroelectric cubic–tetragonal phase transition temperature T C in (Ba 1- x Ca x )TiO 3 (BCT) is almost unchanged and is maximum at x ∼0.06 in the T – x phase diagram, in contrast to many other lead-free BaTiO 3 -based solid solutions that show a decrease in T C by atomic substitution. To investigate the peculiar…
This paper is report on the physical and optical properties of development barium-borate-rice husk ash (BaBRHA) glass system. The glasses containing BaO in xBaO:(80-x)B 2 O 3 :20RHA where x = 30, 35, 40 and 45 wt% have been prepared by melt quenching technique. The physical properties of this glass are shown from dens…
In recent years, natural fibres appear to be as an outstanding material to substitute the conventional reinforcement materials in polymer composites. Kenaf fibre reinforced natural rubber (KFNR) composite was prepared by incorporating of different loadings of kenaf fibre using two roll mill machines. The compound was…
Nanorods of platinum with an average length of 500-1000nm have been prepared by a simple reaction between H 2 PtCl 6 ·6H 2 O and ascorbic acid in the presence of deionized gelatin at room temperature. Gelatin played a decisive role as an inhibitor of the direct reaction of ascorbic acid with H 2 PtCl 6 ·6H 2 O and coa…
The high-temperature thermoelectric properties of p-type Tl-filled skutterudites TlxFe1Co3Sb12 (x = 0, 0.2, 0.4, 0.6, and 0.8) were examined. While samples with x ≤ 0.4 were single-phase Tl-filled skutterudite, samples with x = 0.6 and 0.8 were composed of two phases: TlxFe1Co3Sb12 (x ≈ 0.4) as the matrix phase and a…
Abstract The object of the conducted experimental studies was determination of the physical properties of the BA1044 alloy subjected to several types of toughening and modification under varying conditions. The aim of the experiments was to determine which of the above mentioned technological processes has greater imp…
The corrosion inhibition characteristics of 2-mercapto benzimidazole (MBI), 2-mercapto benzimidazolyl-ethyl acetate (MBEA), 2-hydroxy benzimidazole (HBI) and 2-hydroxy 5-nitro benzimidazole (HNBI) on zinc corrosion in 0.1 M hydrochloric acid were investigated by weight loss and potentiodynamic polarization techniques.…
Phase transition behaviors of unpoled and [011]-poled relaxor ferroelectric Pb(In 1/2 Nb 1/2 )O 3 –Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 single crystals were investigated over a wide temperature range by dielectric and Brillouin scattering spectroscopies. The [011]-poled crystal exhibited two discontinuous dielectric and aco…
In the present study, glycerol was used as plasticizer to prepare silk fibroin (SF)/pearl powder (PP) blend films. The effects of amount of glycerol on structure and properties of the films were investigated. The surface morphology was observed with scanning electron microscopy. The structure of films was investigated…
Visible luminescence of Pr 3+ ions in bismuth borate glasses doped with difference concentration of Pr 2 O 3 have been studies. The glasses of composition 30Bi 2 O 3 : (70- x )B 2 O 3 : x Pr 2 O 3 (where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol%) were prepared by the melt quenching technique. The spectral properties we…