Materials Literature
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We have controlled the nature of magnetic ordering in RbxBayMn[3-(x + 2y)]/2[Fe(CN)6]·zH2O prussian blue analogues by alkaline earth metal cation (Ba2+) substitution and application of an external magnetic field. Structural analysis, by employing Rietveld refinement of X-ray and neutron diffraction patterns, reveals a…
Insitu polymerization of aniline was carried out in the presence of stannous oxide (SnO) to synthesize Polyaniline (PAni)/SnO composites by chemical oxidation method. The surface morphology of the composites were studied by scanning electron microscopy (SEM).The electromagnetic interference (EMI) shielding properties…
An understanding of the mechanical response of modern engineering alloys to complex loading conditions is essential for the design of load-bearing components in high-performance safety-critical aerospace applications. A detailed knowledge of how material behaviour is modified by fatigue and the ability to predict fail…
The undoped and nitrogen-doped SiC bulk crystals irradiated with two neutron fluences were investigated by using confocal micro-Raman spectroscopy to analyze the effect of nitrogen impurity on irradiation damage. We found that the nitrogen impurity can promote the segregation of carbon atoms into graphite during heavy…
Abstract Chemical exchange saturation transfer (CEST) agents and paramagnetic CEST (PARACEST) agents display bound water signals that exchange protons with the bulk water. CEST magnetic resonance imaging (MRI) relies on exchangeable protons that resonate at a chemical shift that is distinguishable from the bulk water…
CdS nanoparticles prepared by a mechanochemical reaction in a planetary ball mill have been investigated by x-ray diffraction, optical absorption, and Raman scattering under high pressure conditions up to 11 GPa. The zinc-blende (ZB) to rock-salt phase transition is observed around 6 GPa in all experiments, the transi…
This study investigated the effect of the organic phthalocyanine blue and inorganic ultramarine blue pigments on nucleation of polypropylene (PP). The PP/pigment pellets containing various concentrations of each pigment (0.0001-0.1 wt %) were prepared by a melt blending process using a single-screw extruder, followed…
Abstract The typical process used to synthesize expandable polystyrene was modified and applied to prepare water expandable polystyrene (WEPS)‐starch copolymer. The maleic anhydride was used to improve the compatibility between starch and styrene. Various reaction conditions, weight ratio of styrene/water (O/W ratio),…
The power loss in laminated transformer cores is always greater than the nominal loss of the electrical steel laminations, by a factor known as the building factor. This paper discussed result of an investigation towards the effect of using two different Grain-Oriented Silicon Iron (3%SiFe) materials to the 100kVA thr…
Synthesis of alumina-mullite-silicon carbide composite (Al 2 O 3 -Al 6 Si 2 O 13 -SiCw) was obtained in situ by carbothermal reduction of a mixture of kaolin and two different silica sources. The carbothermal reduction was carried out in a horizontal tube furnace under flow of argon gas. The synthesized products were…
The transient phase and chemical transformations of diffusion controlled metal combustions in bulk Zr, Ti, and Fe foils have been investigated, in situ, using novel time- and angle-resolved x-ray diffraction (TARXD). The TARXD employs monochromatic synchrotron x-rays and a fast-rotating diffracted beam chopper resolvi…
To understand the negligible magnetostriction of Fe-Si alloys used as cores in electric transformers or motors, density-functional calculations were performed on the tetragonal magnetostriction coefficient, λ001, of Fe1-xSix (x ≤ 0.25) alloys as a function of x using the highly precise all-electron full-potential line…
BiFe0.95Mn0.05O3 thin films with different layer thicknesses annealed at temperatures ranging from 500 to 600 °C were fabricated on indium tin oxide/glass substrates using a metal organic decomposition process. The ferroelectric hysteresis loops reveal that the remanent polarization (Pr) in the films of 42, 31, and 20…
Epitaxial La2/3Sr1/3MnO3 films grown on LaAlO3 substrates of various orientations exhibit a range of magnetoresistive properties, demonstrating the utility of strain as an electronic tuning parameter for manganites. Large magnetoresistance over a broad range of temperatures—highest (−64% at 50 kOe) at the lowest tempe…
Piezoelectric films of Pb(Zr0.53Ti0.47)O3 (PZT) were deposited by pulsed laser deposition onto metallic magnetostrictive substrates. In order to optimize the growth of PZT films, a buffer layer of Pt was employed, as well as variation of deposition temperature, pressure, and laser energy. Room temperature θ-2θ x-ray d…
Sandwich composite panels are increasingly used in the construction of marine vehicles because of their outstanding strength, stiffness and light weight properties. However, the use of composite panels comes with difficulties in the design process as a result of the large number of design variables involved, including…
This work presents the chitin preparation from waste sources, the chitin powders were successfully extracted from shrimp shell, crab shell and squid pen. To prepare chitin powders, all raw materials were washed and grounded using agate mortar, which the particle size of powder is 212–250 μm. Then, the powdered materia…
The electronic excited states and electronic absorption spectra of annulated dinuclear free-base phthalocyanine (C(58)H(30)N(16)) are studied through quantum chemical calculations using the symmetry-adapted cluster-configuration interaction (SAC-CI) method. Three tautomers are possible with respect to the position of…
The dielectric properties of the Haldane gap compound Y2BaNiO5 were studied in the frequency range from 20 Hz to 1 MHz between 20 K and room temperature. This compound exhibits a high dielectric permittivity (ɛ′ ∼ 104) at room temperature below 100 kHz. Both dielectric relaxation and dc resistivity ρ follow the therma…
We investigated the thermal stability of e-beam deposited Mo/B4C/Si/B4C layered systems, with and without ion assistance during the growth of the B4C diffusion barrier layers. The thermal stability was investigated by in situ thermal annealing during grazing incidence X-ray reflection. By studying partially treated B4…