Materials Literature
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Shock compressions of nanocrystalline (nc) metals Al and Cu with the same grain size and texture are studied by using molecular dynamics simulations. Results have revealed that the shock front of both Al and Cu can be divided into three stages: elastic, grain-boundary-mediated, and dislocation-mediated plastic deforma…
Magnesium-based bulk metallic glasses (BMG) have potential in applications ranging from biomedical to sports equipment and the Mg-Cu-Y system offers some of the most promising alloys. Phase relations and ternary solubility of the binary and ternary compounds of this system have been experimentally investigated. The Is…
Corrosion performance of biodegradable EW62 alloy obtained by melt spinning is evaluated in a simulated physiological electrolyte. The improved corrosion resistance of this alloy is attributed to the formation of a refined microstructure and oxide film both enriched with abnormal content of Nd. The beneficial effect o…
The effect of additions up to 9.6%wt BaTiO 3 on grain growth and microstructure in ZnO samples sintered at 1300°C has been studied using scanning electron microscopy, energy dispersive X‐ray, X‐ray diffraction and impedance analyser as techniques. The sample doped with 1.6%wt BaTiO 3 , leads to grain size increasing a…
We study the changes in the conformations of brushes upon the addition of crosslinks between the chains using the bond fluctuation model. The Flory-Rehner model applied to uniaxially swollen networks predicts a collapse for large degrees of crosslinking q proportional to q(-1∕3) in disagreement with our simulation dat…
Eu<sup>3+</sup> doped fiber-based germanotellurite (NZPGT) glasses with medium-low maximum phonon energy of 782 cm<sup>-1</sup> have been fabricated and characterized. Judd-Ofelt intensity parameters Ω<sub>2</sub> (6.25 × 10<sup>-20</sup> cm<sup>2</sup>) and Ω<sub>4</sub> (1.77 × 10<sup>-20</sup> cm<sup>2</sup>) indic…
Feather is a waste product generated in large quantities from industrial poultry processing. Recycling of this renewable source of biopolymers has been the objective of many researches due to its high protein content, biodegradability, and biocompatibility. This study investigates the feasibility of producing nanopart…
The paper presents a novel method for determining the crystal-chemical heterogeneity of finely dispersed dioctahedral 2: 1 mica mineral phases based on the modeling of their powder diffraction patterns. We used three samples, which were taken from Lower-Middle Riphean rock sections of the Anabar and Olenek uplifts in…
Within the scope of experiments, the effect of stitch yarn type (aramid, glass and nylon), and biaxial, warp and weft, and yarn type (aramid and glass) was investigated in the biaxial weft-knitted (BWK) composites. Five different types of composite panel, which include fiber contents, such as glass-glass-glass, glass-…
Experimental bird strike tests were conducted in which a 2.6-kg dead chicken was projected at a speed of 500 km/h to hit a raised aerodynamic brake wing. The brake wing was fabricated with a sandwich of composite material as its skin and polymethacrylimide foam as its core. Pre-test numerical analyses of bird strikes…
Abstract The effects of the rare earth element Y addition on mechanical properties and energy absorption of a low Zn content Mg–Zn–Zr system alloy and the deformation temperature of optimized alloy were investigated by room tensile test, optical microscopy (OM), X‐ray diffraction (XRD), scanning electron microscopy (S…
Solid-state healing of epoxy networks is shown to be an effective and robust mechanism for highly cross-linked epoxy networks. Using diglycidyl ether of bisphenol A epoxy resin and diethyltoluenediamine, the cured epoxy network is transformed into a mendable system using phenoxy resin and low-molecular-weight polybisp…
We report, for the first time, experimental evidence for the nature of atomic defects with different sizes in glass and crystalline phase of Ge–Te alloys using positron lifetime spectroscopy. The obtained positron lifetime results have been correlated with the size of the open volume (cavities) defects. We provide dir…
Ab initio calculations using plane wave pseudopotential method within density funtional theory are applied to investigate mechanical and electronic properties of Al-terminated Me(1 1 1)/Al2O3(0 0 0 1) (Me = Al, Ag, Cu, Nb) interfaces. Stress–displacement relationships of separation perpendicular to the interface are c…
PURPOSE: In this study, the suitability of amide proton transfer (APT) imaging as a biomarker for the characterization of high intensity focused ultrasound (HIFU)-treated tumor tissue was assessed. METHODS: APT imaging was performed on tumor-bearing mice before (n = 15), directly after (n = 15) and at 3 days (n = 8) a…
The influence of compressive strain on the deformation of GaAs nanoparticles embedded in different host matrices is investigated. The simulation results indicate that it can be easier to deform GaAs nanoparticles grown in an Al2O3 film than those in an SiO2 film. The deformation induced by the applied compressive stra…
Magnetic properties of polycrystalline La1−xCaxCoO3 (0.10≤x≤0.25) are systemically studied in this work. It is found that all the samples exhibit the ferromagnetic states at low temperatures with two ferromagnetic transitions. A detailed analysis on their magnetic susceptibilities reveals that the Co ions of those com…
Kristallklar: Über Veränderungen der Ladungsträgerdichte auf dotierten Halbleiternanokristallen lassen sich lokale chemische Vorgänge verfolgen. Redox- und Ligandenprozesse bewirken beispielsweise Änderungen in der Leerstellendichte von Kupfer(I)-sulfid-Nanostäben, durch die sich die lokalisierte Oberflächenplasmonenr…
The internal flexibility and interacting ability of PAMAM-dendrimers having 4-carbomethoxypyrrolidone-groups as surface groups (termed Gn-Pyr), which may be useful for biomedical purposes, and ion traps were investigated by analyzing the EPR spectra of their copper(II) complexes. Increasing amounts (with respect to th…
The size and temperature dependence of the pure-dephasing processes involved in luminescence, multiple exciton generation (MEG), and multiple exciton fission (MEF) are investigated for Sin clusters (n = 5-10, 15) using ab initio molecular dynamics and optical response function theory. The cluster bandgaps correlate wi…