Materials Literature
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In this paper, we address the differences between Finnis–Sinclair potentials and bond-order potentials (BOPs) when studying 1/2⟨111⟩ screw dislocations in bcc transition metals, specifically Mo and W. These two types of potentials differ in that the former is central-force, whereas the latter include angular bonding.…
We present a computational approach based on the Volume-of-Fluid (VOF) method for simulating the influence of a soluble surfactant on the behavior of two-phase systems with deformable interface. Our approach is applicable to diffusion controlled processes, where the relation between the area-specific excess surfactant…
Abstract Modified acrylonitrile‐styrene‐acrylate (MASA) were prepared by grafting with maleic anhydride and optimization was carried out. The compatibilizer with four parts of ASA‐ g ‐MA in 10 parts of acrylonitrile‐styrene‐acrylate (ASA) was found effective in improving the interface. On that basis, the different com…
Abstract In X-ray diffraction (XRD) analysis, preparation of oriented clay specimens enhances their 00 l reflections by arranging basal surfaces parallel to the specimen surface. In one-dimensional modeling of XRD intensities, degree of preferred orientation is one of the variable parameters and a user may choose diff…
Plastic deformation of polycrystalline materials is largely controlled by the interaction between lattice dislocations and grain boundaries. The atomistic details of these interactions are, however, difficult to discern even by advanced high-resolution electron microscopy methods. In this paper, we study several inter…
In situ high-pressure angle dispersive x-ray diffraction experiments using synchrotron radiation on inverse spinel structure Zn2SnO4 nanowires were carried out with a diamond anvil cell at room temperature. The crystal symmetry becomes lower at around 12.9 GPa and an intermediate phase with an orthorhombic structure o…
Porous germanium films with good adhesion to the substrate were produced by annealing GeO2 ceramic films in H2 atmosphere. The reduction of GeO2 started at the top of a film and resulted in a Ge layer with a highly porous surface. TEM and Raman measurements reveal small Ge crystallites at the top layer and a higher de…
Nano-grain W samples were implanted with 30 keV 3 He ions to fluences of 10 21 , 10 22 and 10 23 He m −2 , at temperatures ranging from approximately 1273 to 1423 K. One specimen was implanted with 30 keV 4 He ions at 1273 K to 10 24 He m −2 . Scanning electron microscopy showed the onset of visible surface pore forma…
The use of magnetic nanoparitilces for biological and biomedical applications such as protein separation, targeted drug delivery, hyperthermia treatment, use as contrast agents of magnetic resonance imaging, biosensing, magnetic fluids environmental remediation is one of the most attractive fields of nanotechnology to…
CONTEXT: -Nephrogenic systemic fibrosis (NSF) is a rare but serious disorder initially described as a purely dermatologic process. Isolated autopsy reports have described multiorgan involvement by this disease. OBJECTIVE: -To further illustrate the varied and systemic involvement of NSF by describing the autopsy exper…
The history of fragment-based drug discovery, with an emphasis on crystallographic methods, is sketched, illuminating various contributions, including our own, which preceded the industrial development of the method. Subsequently, the creation of the BMSC fragment cocktails library is described. The BMSC collection cu…
Consideration is given to the resolution of dislocation density afforded by EBSD-based scanning electron microscopy. Comparison between the conventional Houghand the emerging high-resolution cross-correlation-based approaches is made. It is illustrated that considerable care must be exercised in selecting a step size…
The core structure of screw and edge dislocations in fcc Al was investigated using orbital-free density functional theory (OF-DFT). Detailed calibrations of kinetic energy density functionals (KEDFs) and local pseudopotentials were performed to reproduce accurately the energies of several phases of bulk Al, as well as…
Nanowires of lead telluride (PbTe) were patterned on glass surfaces using lithographically patterned nanowire electrodeposition (LPNE). LPNE involved the fabrication by photolithography of a contoured nickel nanoband that is recessed by approximately 300 nm into a horizontal photoresist trench. Cubic PbTe was then ele…
Synergistic effects of two kinds of rare earth oxides (REOs), neodymium oxide (Nd 2 O 3 ) or lanthanum oxide (La 2 O 3 ) on the intumescent flame retardancy of thermoplastic polyolefin (TPO) made by polypropylene/poly (octylene‐ co ‐ethylene) blends were investigated systemically by various methods. The limiting oxyge…
Abstract A novel gas pressure cell for in situ neutron powder diffraction has been developed. It is based on a single crystal sapphire tube as a sample holder, allows a 360° unobstructed access by the neutron beam and has little background contribution. This device was used to study the hydrogenation of α‐MgPd 3 , whi…
Abstract This work is related to the enhancement of the fatigue properties in ultrafine-grained Ti alloys produced by severe plastic deformation techniques. To process commercially pure Ti Grade 4 and Ti-6Al-4V alloys, combined severe plastic deformation techniques that include equal channel angular pressing and addit…
This paper deals with dc creepage breakdown characteristics of oil-immersed insulation in HVDC transformers. The authors investigated dc breakdown characteristics using element insulation models and a full-scale model with a high creepage electric field on the insulation surfaces. The results are as follows: The diele…
Recent advances in fabricating, measuring, and modeling of top-gated graphene FETs for high-frequency electronics are reviewed. By improving the oxide deposition process and reducing series resistance, an intrinsic cut-off frequency as high as 50 GHz is achieved in a 350-nm-gate graphene FET at a drain bias of 0.8 V.…
Understanding the effect of size scaling on resistance window in phase-change memory (PCM) requires accurate models for conduction in the amorphous phase of the active chalcogenide material. This work presents a new conduction model for the chalcogenide amorphous phase, describing Poole-Frenkel (PF) transport through…