Materials Literature
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The mechanical performance, workability, weldability and corrosion resistance of structural high strength low alloy (HSLA) steels used in offshore engineering have been generally required. The effect of grain size on the corrosion resistant performance of a C-Mn structural steel has been investigated with stress on hu…
The crystallization, mechanical properties and heat resistance of β-iPP were investigated by means of DSC, WAXD, PLM, SEM, mechanical and heat deflection tests. It is revealed that the content of β crystal of β-iPP is higher than that of pure iPP, and the content of β crystal of the core is higher than that of the ski…
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
One dimensional band structure limit is applied on monolayer graphene nanoribbon homo-junction. The parabolic band energy approximation on graphene nanoribbon in low energy limit is assumed which means carrier movement can be presumed as a ballistic transport. Two graphene nanoribbon with different width are projected…
In subsea oil and gas systems, steel linepipes (typically API X65) have been welded to 8630M low alloy steel hubs, using a buttering technique and nickel alloy filler materials (e.g. Alloy 625). After buttering, postweld heat treatment (PWHT) is carried out to temper the heat-affected zone of the low alloy steel. Howe…
With advancements in aberration correction, the spatial resolution of scanning transmission electron microscopy (STEM) has been enormously improved. In addition to the reduction of the STEM probe size, a dramatic increase in the STEM probe current has been realized, leading to the routine acquisition of high-resolutio…
Water-assisted melt-intercalation process is a relatively new method for nanocomposite production. Technical challenges notwithstanding, this process is capable of bringing forth good results and promising advantages. Having used this process, we produced composites in a twin-screw extruder. The aim of this study was…
LaMnO 3 and ( La , Sr ) MnO 3 were prepared as mesoporous powders using sol‐gel methods that incorporated evaporation‐induced self‐assembly of surfactants as structure‐directing agents. The precursor and surfactant concentrations, surfactant character (mainly molecular weight), aging humidity, and annealing temperatur…
The mechanochemical solid-state synthesis of Zn x Cd 1-x S nanoparticles from zinc acetate, cadmium acetate and sodium sulphide in a planetary laboratory mill is described. Through changing the molar ratio of the Zn and Cd precursors, Zn x Cd1 -x S nanoparticles of different composition were prepared. Structural, surf…
The microstructure, as well as the mechanical and thermal properties, of phosphate glasses (PhGs) doped with rare earth elements (REEs), namely, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, and Yb, were studied in the present paper. The strength parameters of the PhGs and their dependence on the load value modification were estima…
Starting with a nearest-neighbors tight-binding model, we rigorously investigate the bulk zero-field orbital susceptibility of a non-interacting Bloch electrons gas in graphene-like solids at fixed temperature and density of particles. In the zero-temperature limit and in the semiconducting situation, we derive a comp…
This paper deals with electric field vector characteristics in three-phase gas insulated switchgear (GIS). The electric field in a three-phase construction of a simplified GIS model was analyzed. The results show that the electric field vector varies with phase of applied voltage. While the voltage phase varies in a c…
Microencapsulated ammonium polyphosphate (MEAPP) with a shell of epoxy resin (EP) is prepared by in situ polymerization, and characterized by FTIR and SEM. The results of FTIR and SEM show that APP is microencapsulated by a layer of EP. After microencapsulation, a great improvement in water resistance is observed from…
We discuss the aesthetic appeal of liquid crystal textures and take a brief polarising microscopic tour through the wealth of the appearances of nematic, cholesteric, smectic and banana phases. Some examples are given on how these textures may be used in a creative process employing digital image processing to produce…
A new mechanism has been proposed for synthesizing barium ferrite by sol-gel method. The mechanism takes account of the structure of barium hexaferrite and the least structure change principle. It is useful in optimizing the synthetic conditions.
An acoustic Partial Discharge (PD) location problem modeled mathematically, gives system of sphere equations, which are non-linear. These equations are formed with known acoustic emission (AE) sensors co-ordinates, with PD locations co-ordinates as unknowns. Newton's method is implemented to locate the PD activity usi…
Spin-capable multiwalled carbon nanotube (MWCNT) forests that can form webs, sheets, and yarns provide a promising means for advancing various technologies. It is necessary to understand the critical factors to grow spin-capable carbon nanotubes (CNTs) in a repeatable fashion. Here we show how both the spinning capabi…
In this work, we report detailed investigations on the structural and magnetic properties of pure and Co-doped CeO 2 nanoparticles. All the samples, with different cobalt concentrations, were prepared by the co-precipitation method. To investigate the structural properties and phases present in the samples, systematic…
The effect of La addition on the microstructure and phase transformation behavior of Ti 49.3 Ni 50.7 alloy is investigated by optical microscope (OP), scanning electron microscope (SEM), X-ray diffraction analysis (XRD) and differential scanning calorimeter (DSC). The results show that the microstructure of Ti-Ni allo…
In this paper, an improved tunable phase shifter with broadband and wide range of the phase shift is proposed. The structure consists of two improved tunable composite right/left handed (CRLH) transmission line (TL) unit cells. A π-shape circuit model is adopted for each unit cell, and its phase characteristic is disc…