Materials Literature
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Mg/TM thin films are objects of interest as hydrogen storage materials due to their expected interesting thermodynamic and hydrogen sorption kinetic properties. Here we report on the results of ab initio calculation on the stability of Mgn/Ti and Mgn/Nbm thin films.
Composite BaTiO 3 –CoFe 2 O 4 nanostructures deposited on a SrTiO 3 substrate are known to produce the magnetoelectric coupling effect. Although the coupling efficiency is significantly influenced by the composite layout, there appears no systematic simulation approach for configuring optimal layouts. In this study, a…
Abstract The compatibility of poly(ethylene oxide) (PEO) and poly(methyl methacrylate) (PMMA) blends was studied over a wide range of compositions at 400 K by mesoscopic modeling. Sixteen patterned surfaces of four types were designed and designated as “ci,” “co,” “gra,” and “rg” to study their influence on changing t…
A new open-framework iron borophosphate, KFe[BP2O8(OH)], has been obtained by ionothermal synthesis from KH2PO4, FeCl3∙4H2O, H3BO3 and [C4mpyr]Br (1-butyl-1-methylpyrrolidinium bromide). Single-crystal X-ray diffraction analysis shows that KFe[BP2O8(OH)] (monoclinic, P21/c, a = 9.372(2) Å , b = 8.146(2)Å , c = 9.587(2…
Abstract The phonon spectra and structural characteristics of the LuFe 2 O 4 system were investigated using X‐ray diffraction as well as Raman and infrared (IR) spectroscopic techniques. Two step‐like anomalies of the wavenumbers of the $E_{\rm {g}}^{3}$ peak in the Raman spectra and the $E_{\rm {u}}^{3}$ peak in IR s…
Ti-based BCC solid solutions are promising hydrogen storage applications. Unfortunately, the application of these alloys in large scale is hindered by the high cost of vanadium. The solution of this problem may be to replace vanadium by ferro-vanadium (FeV). Here, we report our recent investigation of compositions TiV…
The improvements of physicochemical and thermomechanical properties of polymer composite materials has been a major research interest in the last few decades. Polymer nanocomposites (Mohammad, 2006; Xiangling, 2003) represent a new class of materials alternative to conventional filled polymers. In this new class of ma…
Corrosion control is an important subject of increasing interest to the modern metallic finishing industry. Surface modification of metallic substrates by organic or polymeric coatings is an essential approach for enhancing surface properties such as wear, oxidation, and corrosion. Various conventional techniques are…
Abstract The properties of the surface films formed on Ti and its Ti–5Al–4V and Ti–6Al–3.5Fe alloys by chemical (immersion in 10 M NaOH) and thermal treatment (500 °C) were studied in this paper. Their corrosion behaviour in Ringer solution was investigated. After treatments, the sample microhardness was measured. Als…
Surface integrity of machined products can have a critical impact on their performance, such as corrosion, wear and/or fatigue resistance. It has been reported that reducing the grain size of AZ31B Mg alloys could significantly enhance its corrosion resistance, which is often the limiting factor for its wide applicati…
Here we study the influence of Al doping on the magnetization, heat capacity, and entropy change of La(Fe${}_{0.88}$Si${}_{0.12\ensuremath{-}x}$Al${}_{x}$)${}_{13}$ where $x$ $=$ 0, 0.048, and 0.081. When $x$ $=$ 0, the system shows a remarkably sharp heat capacity feature associated with spin fluctuations coincident…
During the last decades hydrogen has attracted worldwide attention as an energy carrier. MgH2 is one of the most promising materials for hydrogen storage due to its high hydrogen uptake, large reserves and low cost. However, the potential for practical use of MgH2 is severely limited because of its high temperature of…
Magnesium complex hydrides as Mg2FeH6 are interesting phases for hydrogen storage in the solid state, mainly due to its high gravimetric and volumetric densities of H2. However, the synthesis of this hydride is not trivial because the intermetallic phase Mg2Fe does not exist and Mg and Fe are virtually immiscible unde…
Since the historical observation of single layer graphene by Germ and his co-workers in 2004, this atomically thin carbon film has received ever-increasing attention and become a rapidly rising star on the horizon of materials science and condensed-matter physics (Novoselov et al., 2004).Graphene exhibits many unusual…
Abstract SiO 2 particles prepared by Stöber method were modified using 1,3,5,7‐tetravinyl‐1,3,5,7‐tetramethylcyclotetrasiloxane (Vi‐D 4 ), and SiO 2 /polystyrene (PS) composite particles with core‐shell structure were synthesized adopting mulsion polymerization of PS in a water–ethanol medium. The products were charac…
Thermoelectric (TE) properties of skutterudites DDy(Fe1-xCox)4Sb12 for 0.2 x 0.3 were studied in the temperature range from 300 K to 800 K and compared with values for x = 0. Didymium (DD, 4.76 mass % Pr and 95.24 mass % Nd) was used as natural double filler. At Co-concentrations 0.225 x 0.25 maximum TE-perform…
This book chapter is based on the experimental activities conducted mainly at Sapienza University of Rome: Astronautic, Electric and Energetic Engineering Department in collaboration with University of Maryland, Institute for Research in Electronics and Applied Physics (IREAP). A branch of scientific research about co…
Abstract An imidazoline‐based dissymmetric bis‐quaternary ammonium gemini surfactant has been synthesized. Its surface active properties at equilibrium in water at 25 °C were determined. The inhibitive effect of the compound on Q235 steel in 1 M hydrochloric solution was investigated by the weight‐loss method, potenti…
Ensembles of alumina capped ZnO quantum dots (ZQDs) were grown using pulsed laser deposition. The ZQDs of mean radii comparable to and smaller than the pertinent excitonic Bohr radius (∼2.34 nm), called ultrasmall quantum dots, show size dependent optical absorption edges, which follow the strong confinement model. In…
Abstract Linear and heavy alkyl benzene (HAB) were sulfonated with fuming sulfuric acid (oleum) and the sulfonated products were esterified with tri and poly ethanolamine ( d = 4 and 6). The prepared three esters from each series were quaternized with n ‐butyl bromide. The resulted six quaternized ester of linear and…