Materials Literature
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Magnesium is the lightest of metals used for constructional alloys. These alloys are characterised by low density and good mechanical properties Among various magnesium alloys, rare earth containing alloys are known to show good mechanical properties and excellent creep resistance Mainly for these reasons, magnesium a…
Reibungsloser Übergang: Neue hybride Fulleren-artige Nanostrukturen aus MoS2 bestehen aus einem oktaedrischen nanoskaligen Kern, der nahtlos in quasi-sphärische Schalen übergeht (siehe Bild). Die Partikel wurden durch strahlungsintensive Solarablation erzeugt und ihre Strukturen mittels Modellstudien bestätigt.
The nonlinear dependence between the duty-cycle of semiconductor nanorod array and its surface reflectance minimization is demonstrated. The duty-cycle control on thin-SiO2 covered Si nanorod array is performed by O(2-) plasma pre-etching the self-assembled polystyrene nanosphere array mask with area density of 4 × 10…
Hot Forming Characteristics of Magnesium Alloy AZ31 and Three-Dimensional FE Modeling and Simulation of the Hot Splitting Spinning Process
Magnesium (Mg) and its alloys have recently attracted growing interest especially in the automobile industries due to their excellent specific properties, as one of the lightest structural materials To date, most of Mg products have been fabricated by casting, in particular, by die-casting because of its high producti…
The demand to reduce the weight of components especially in automotive and aerospace industries has triggered renewed interest in magnesium alloys as a lightweight structural material. Magnesium which is a third lighter than aluminium is the lightest of the structural metals and is used in a diverse range of applicati…
Magnesium is an important engineering material because of its light weight and excellent properties. Its density is 1.74 g⋅cm-3, only 2/3 that of aluminum and 1/4 that of iron. Moreover, it also has many advantageous properties such as good castability, hot formability, excellent machinability, good electromagnetic sh…
Taking into account the well known correspondence between the field theoretical ϕ(4) O(n)-vector model in the limit n → 0 and the behavior of long flexible polymer chains in a good solvent, the universal density-force relation is analyzed and the corresponding universal amplitude ratio B(real) is obtained using the ma…
Structural, elastic and dynamical properties of the rock-salt HfC have been studied by employing an ab initio pseudopotential method and a linear response scheme, within the generalised gradient approximation. In addition to achieving good agreement with experimental measurements of the phonon dispersion results along…
The boundary integral equation method (BIM) was one of the first methods in grating theory. It has been used for the investigation of diffraction gratings of extremely different kinds as well as for photonic crystal diffraction gratings. Besides an overview of three of the most important BIMs for in-plane diffraction,…
Riboflavin biosynthesis is an essential pathway in bacteria, in contrast to animals, which obtain riboflavin from their diet. Therefore, the enzymes involved in the riboflavin-biosynthesis pathway are potential targets for the development of antibacterial drugs. Lumazine synthase, an enzyme that is involved in the pen…
One-dimensional fused-azulene oligomers (n = 2-6) are studied with the effective valence bond as well as density functional theory methods. A nonferromagnetic (closed-shell singlet) to ferromagnetic (triplet) ground state transformation is witnessed with increasing length of oligomers. The computational results are in…
Surface-enhanced Raman spectroscopy (SERS) has been shown to be an effective technique for increasing the detection sensitivity in chemical and biological applications. SERS has a distinct advantage over normal Raman spectroscopy, with enhancements typically greater than 10 4 over the normal Raman signal; however, thi…
Self-repairing structural systems have the potential for improved performance ranges and lifetimes over conventional systems. Self-healing materials are not a new phenomenon and have been used in automotive and aeronautical applications for over a century. The bulk of these systems operate by using damage to directly…
Where light-weight components are desired, e.g. in automotive and aerospace applications, magnesium can provide an important advantage over other structural materials such as aluminum and steel. The density of magnesium is two thirds that of aluminum and a quarter that of galvanized steel. The combination of low densi…
Field‐assisted sintering technique (FAST) and spark plasma sintering (SPS) apparatuses are based on the same technical principles, but differ in design. A current flows directly through the graphite pressing tool, which acts as heating element in both machines. The main differences are the pressing tool geometry and m…
Amorphous sol–gel‐derived fibers of 82 mol% Al 2 O 3 –18 mol% Y 2 O 3 were synthesized for structural and sintering investigations. Three sets of samples were fabricated by treatment up to 500°C in nitrogen (“N 2 500”), water vapor (“H 2 O500”), or an atmosphere that changed from evaporated nitric acid (up to 300°C) t…
The development of biodegradable implants has grown into one of the important areas in medical science (Mani et al., 2007), since they can be gradually dissolved, absorbed, consumed or excreted in human body environment, and then disappear spontaneously after the bone tissues heal. The biodegradable materials availabl…
Free radical scavenger biocompatible polymers are being used increasingly in biomedical applications due to their antioxidant activity. In this study, the biocompatible polymer poly(maleic anhydride- alt -butyl vinyl ether) 5% grafted with monomethoxy poly(ethylene glycol) 2000 MW (PEG) and 95% grafted with 2-methoxye…
The crystal structures of two new high-pressure AlPO(4) phases are reported. One phase synthesized at 6 GPa and 1523 K is triclinic (P1) whilst the other phase synthesized at 7 GPa and 1773 K is monoclinic (P2(1)/c). (31)P MAS (magic-angle spinning) NMR suggests three tetrahedral P sites with equal abundance in both p…