Materials Literature
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Al-Cu and Al-Zn-Mg alloys exhibit excellent physical and mechanical properties, and are widely used for aerospace applications. However, these properties may be further improved through high-pressure torsion (HPT) processing. HPT processing was carried out on Al-2014 alloy and Al-7475 alloy to investigate the improvem…
Ni-Carbon nanotube (CNT)-Ni0.5Zn0.5Fe2O4 multiphase composites were sintered by spark plasma sintering (SPS) technique. Ni nanoparticles were in-situ formed due to the localized carbothermal reduction by CNTs and well distributed between grain boundaries in the composites. The electrical conductivity of the resultant…
This paper discusses a methodology used to set, already at an early stage of technology development, the key performance requirements for carbon dioxide capture technologies necessary to meet a certain capture cost target. The methodology also illustrates how realistic or unrealistic cost targets can be. Although, app…
The blends of thermoplastic polyurethane (TPU) with natural rubber (NR) at four different blends ratios were prepared via melt blending, with addition of liquid natural rubber (LNR) as compatibilizer. The effect of blend ratio and temperature on the tensile properties and swelling ratio was studied. The addition of NR…
The inhibiting effect of dithizone (Diphenylthiocarbazone) has been studied regarding the corrosion of 316 stainless steel in 20% w/w HCl at 35C. The effects of the inhibitor have been demonstrated using weight loss measurements. The increase of the inhibitor concentration leads to a decrease in the corrosion rate. T…
The Sm3+doped Co2Z-type hexagonal ferrite materials were prepared by conventional ceramic method and characterized by techniques such as X-ray diffractometer and scanning electron microscopy. The influence of a small amount of Sm3+addition on structures and magnetic properties of the materials was investigated. The re…
In order to improve interfacial bonding strength between carbon nanofibers (CNFs) and SiC matrix in CNFs/SiC composites and to disperse CNFs uniformly in the matrix, SiC coating on surface of CNFs was performed in argon atmosphere in the temperature range of 1400 to 1800°C using SiO2, SiO, and mixture of Si and SiO2 p…
Sr2+, Al3+-doped LaScO3 perovskite-type oxide (La0.675Sr0.325Sc0.99Al0.01O3; LSSA), which exhibits high conductivity of both oxide-ion and proton, is expected to become an electrolyte material for high-temperature solid oxide fuel cells (SOFCs). Considering the potential of this material to serve as a solid electrolyt…
X-ray study of vanadium–tungsten mixed-monolayer-oxide catalysts grown on the rutile α-TiO 2 (110) single crystal surface shows redox behavior not observed for lone supported vanadium or tungsten oxides.
Dendritic polymers with highly branching structures exhibit many unique properties. In this paper, a computational study using the Wang-Landau sampling technique is carried out to reveal the phase transition behaviours of dendritic homopolymers with various branching structures. Two types of dendritic homopolymers, de…
A new chiral TTF-based donor has produced enantiopure R , R and S , S radical cation salts with the tetrafluoroborate anion as well as the nearly isostructural meso /racemate mixture.
Polyhydroxybutyrate (PHB) based materials were prepared by melt extrusion by using different plasticizers, such as poly(ethylene glycol)s (PEG)s having different molecular weight (400, 1500 and 4000). The plasticizers content was varied in the range 10–20% by weight versus the PHB polymeric matrix. The variation of te…
Achieving high directivity antenna usually requires a large size antenna aperture in traditional antenna design. Previous work shows that, with the help of metamaterials and transformation optics, a small size antenna can perform as high directivity as a large size antenna, but the material parameters are inhomogeneou…
\n\t\t\t\t\tThe sale of alpaca fiber is the main income for thousands of families in the Central Andes of Peru. Little information exists on the fiber length growth rate of alpaca (FLG), especially throughout their first year of life when the fiber is most valuable. We aimed to determine the monthly FLG of 22 alpaca o…
The synthesis of clickable polysaccharides was achieved by using alkynylated 1,6-anhydro glucopyranose as a monomer and BF3·OEt2 as an effective catalyst. Subsequent click conjugation with polyethylene glycol (PEG) afforded PEG-grafted polysaccharides in nearly quantitative efficiency.
. Polymeric materials based on petroleum have generated a major problem for the environment because they are produced by non-renewable sources. Many studies are being conducted to propose alternatives to obtain polymers from renewable raw materials sources. The disadvantage of this alternative is the use of food sourc…
Molybdenum oxide (MoO3) films were deposited on glass and silicon substrates by sputtering of molybdenum target at different substrate temperatures in the range 473-573 K at a constant oxygen partial pressure of 4x10-4 mbar employing RF magnetron sputtering technique. The effect of substrate temperature on structural,…
The performances in methane steam reforming of Ni catalysts supported on (Ce0.75Zr0.25)O2−y (CZ) and (Ce0.75/1.025Zr0.25/1.025Pr0.025/1.025)O2−y (CZP), which were fired at various temperatures before Ni deposition, were studied. The catalytic activities of the Ni/CZP catalysts were several per cent higher than those o…
The mixed alkali effect on zinc borate glasses have been reported. The glass systems of nominal composition 10Zn+xLi2O+yNa2O+80B2O3 (x = y = 0, 5, 10, 15 mol%) were prepared using standard melt quenching method. The structural, physical and mechanical properties of the samples have been studied using X-ray diffraction…
We have studied the formation of buried, hollow channels in oxidized porous silicon produced by a process based on focused high-energy ion irradiation of low resistivity, p-type silicon.