Materials Literature
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Rhombohedrally distorted perovskite BiFeO3–K0.5Na0.5NbO3 ceramics with ferroelectricity and ferromagnetism were synthesized by solid-state reaction. The effect of K0.5Na0.5NbO3 content on the crystal structure, electrical and magnetic properties of a BiFeO3–K0.5Na0.5NbO3 system was examined with a view to achieving mu…
We perform a cold forging and annealing technique on Mg alloy AZ31 and investigate the impact on microstructure evolution and mechanical property. In particular, we focus on how twin and static recrystallization behave during the forging process followed by the annealing. Interestingly, we find that a large number of…
Strontium hexaferrite (SrFe 12 O 19 ) nanoparticles have been prepared with co-precipitation in aqueous solutions and precipitation in microemulsion system water/SDS/n-butanol/cyclohexane, using iron and strontium nitrates in different molar rations as a starting materials. The mixed Sr 2+ , Fe 3+ hydroxide precursors…
HCN synthesis from methanol ammonia steam mixtures was studied with the cogeneration of electrical energy in a solid oxide fuel cell (SOFC). The SOFC was electrolyte-supported using a gadolinia-doped ceria (CGO) electrolyte and operated in the temperature range 500 – 650 ° C . The anode was a mixture of Ni/CGO composi…
High chromium nickel-base weld filler metals 52 (ERNiCrFe-7) and 52M (ERNiCrFe-7A) have in recent years replaced filler metal 82 (ERNiCr-3) for new fabrication and for repair applications in commercial nuclear power plants. Filler metals 52 and 52M are selected because they have excellent resistance to primary water s…
The present work deals with grain refinement of medium carbon steel, having different initial microstructure, modified by either thermal and/or thermomechanical treatment (TM) prior severe plastic deformation. In case of TM treated steel, structure refinement was conducted in two steps. Preliminary structure refinemen…
Undoped zinc oxide (ZnO) and cobalt doped ZnO nanostructures without any surfactant were grown by hydrothermal method by varying the process parameters such as molarity of precursors and time of growth. X-ray diffraction spectra of the sample show wurtzite ZnO without any secondary Co phases. SEM image confirms the fo…
The application of natural fibres as polymer reinforcement is of extreme interest, especially in combination with biodegradable polymers. Such “green” composite represent a step forward to eco-design and environmentally friendly applications. The use of biodegradable polylactic acid (PLA) on the basis of renewable res…
Symmetrically substituted hexakis(alkoxy)triphenylene (HAT) derivatives were assembled into single molecular thick 2D nanosheets, which stacked further to give multilayered nanofibers through a convenient solution process. Detailed information on molecular arrangement was unraveled by various imaging techniques and di…
The aim of the research was to characterize the concrete mixtures for spun-cast concrete and to determine the relationship between the compacting ratio and the manner of segregation. In the research 23 specimens of 9 different mixtures with low w/c ratio were tested. Investigated parameters included w/c, spinning spee…
Sublimation of europium pivalate binuclear complexes Eu 2 (Piv) 6 and [Eu 2 (Piv) 6 · (Phen) 2 ] (Piv = (CH 3 ) 3 CCOO, Phen = C 12 H 8 N 2 ) in the temperature range of 383–660 K is studied by the Knudsen effusion method with mass-spectrometric analysis of the gas phase. The vaporization of Eu 2 (Piv) 6 is shown to b…
A facile synthesis of composite ruthenium-containing silica nanomaterials from amine stabilized-ruthenium nanoparticles as elemental bricks is described. This route takes advantage of an organometallic approach and the use of bifunctional H2N–(CH2)x–Si(OEt)3 amines as stabilizing ligands (x = 3, 11) for the synthesis…
We have developed the high ionic conducting glass-ceramics with the crystalline phase of Li1+x+yAlx(Ti2−yGey)P3−zSizO12 with the NASICON type structure. This type of glass-ceramics exhibits high lithium-ion conductivity of 10−4 S cm−1 or more at room temperature. Although this glass-ceramics reacts with Li metal gradu…
We reported novel nanoporous gold (NPG) with surface modified by TiO2 nanoparticles. The as-fabricated sample showed larger effective area than bare NPG. Microstructure characterization demonstrated that the TiO2 nanoparticles effectively suppressed the coarsening of the nanoporous structure by the reaction with gold…
Porous SiC ceramics were fabricated by the carbothermal reduction of polysiloxane-derived SiOC containing hollow microspheres followed by sintering. The effect of the Al2O3–Y2O3–CaO (AYC) content on the microstructure and flexural strength of the porous SiC ceramics were investigated. The growth of large platelet α-Si…
Hyperbranched poly(amidoamine)s with high density tertiary nitrogen (HPAMAMs-OH) were prepared via the two-step reactions. Firstly, hyperbranched poly(amidoamine)s (HPAMAMs) were synthesized by Michael addition of 1-(2-aminoethyl) piperazine (AEPZ) and methyl acrylate (MA) and then alkylation of the residual amino pro…
We present Monte Carlo simulations of liquid-crystalline material confined to a nanoscopic slit-pore. The simulations are carried out under isothermal conditions in a specialized isostress ensemble in which N fluid molecules are exposed to a compressional stress τ‖ acting on the fluid in directions parallel with the s…
Grain boundary engineering (GBE) primarily aims to prevent the initiation and propagation of intergranular degradation along grain boundaries by frequent introduction of coincidence site lattice (CSL) boundaries into the grain boundary networks in materials. It has been reported that GBE is effective to prevent passiv…
Abstract The work shows some results concerning a new cermet material 40 vol.% [(Cu)–Ni]–YSZ processed by mechanical alloying followed by Sintering by Activated Surface method. The projected cermet microstructure for this application is expected to possess microstructural characteristics that lead to better electric a…
The first examples of trinuclear complexes of any dipyridyltriazole, [Fe(II)(3)(Rdpt)(4)(NCS)(6)], are, respectively: [HS-HS-HS] when Rdpt = phdpt and "[LS-HS-LS]" when Rdpt = ibdpt.