Materials Literature
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High purity Al 2 O 3 powder was used as raw material and MgO was used as additive to sinter alumina transparent ceramics in hydrogen atmosphere. EBSD image showed that, with the increase of the MgO content, the grain size decreased from 200μm (when no Mg was doped) to about 20μm (when the Mg doping amount was 1.0wt%),…
Microcellular foam injection parts have many advantages such as saving material and energy, reducing cycle time, and processing excellent dimensional stability. Despite these advantages, the low surface quality problems limit its application scope seriously. In this study, the microcellular foam injection molding prin…
It is well known that graphene is a very promising material due to its excellent physical, chemical, and thermal properties. Previously, ridges in graphene on a substrate were found in epitaxial graphene on a SiC substrate. It was found in this study that ridges can be made on a graphene layer via mechanical exfoliati…
Oxide ceramics such as alumina and zirconia are industrially utilized as cutting tools, a variety of bearings, biomaterials, and thermal and corrosion-resistant coatings due to their high hardness, chemical inertness, high melting point, and ability to retain mechanical strength at elevated temperatures. In this resea…
The use of tungsten as a plasma-facing material necessitates a transition joint to the structural material of the primary coolant loop at some location in order to transport the coolant to the heat exchanger. A critical issue in transition joints is the thermal expansion mismatch between materials, which can lead to u…
Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.
Morphology, crystallinity and electrochemical properties of Si powders fabricated by a mechanical milling process with milling time of 6-40 h were investigated by means of FESEM, XRD, Raman, TEM and cell test. Average size of Si powders was reduced to sub-micrometer scale after 10 h-milling and 40 nm-Si powders could…
We study electrons tunneling through a double-magnetic-barrier structure on the surface of monolayer graphene. The transmission probability and the conductance are calculated by using the transfer matrix method. The results show that the normal incident transmission probability is blocked by the magnetic vector potent…
Abstract Nail/spindle‐shaped polyaniline is synthesized by chemically oxidizing aniline with ammonium persulfate in a near‐neutral aqueous medium using PVP as the stabilizing agent. The type of dispersing agent, APS content and aniline concentration have obvious impacts on the morphology of the resulting polyaniline.…
On the basis of orthogonal experiment method, the grind-hardening of 65Mn steel had been carried out on a conventional surface grinder with alumina grinding wheel, the influence of depth of cut a p , table speed v w , grinding mode g m , and interaction between depth of cut and table speed av on depth and its uniformi…
The effects of Fe substitution for Co on the structural stability and the site preference of intermetallics Nd 2 Co 7- x Fe x with a hexagonal Ce 2 Ni 7- type structure are studied by using a series of interatomic pair potentials. In Nd 2 Co 7− x Fe x , Fe atoms are substituted for Co atoms with a strong preference fo…
The work reports the synthesis, characterization, and the properties of high-purity silica nanospheres from low-cost rice husk. Primarily, the rice husk was washed with distilled water (DW) and subjected to acid leaching to remove the impurities. The treated rice husk was annealed at different temperatures (620 and 90…
The objective of this study was to characterize the tensile strength (TS), tensile modulus of elasticity (TM) and shore hardness (HA) of biodegradable pinewood sawdust (PWS)/polyvinyl alcohol (PVA) composites as affected by press temperature, starch/PVA ratio and press time. PWS/PVA composites were prepared by hot pre…
Long-term afterglow emission (AG) of poly(arylene phthalide) films (PAP) irradiated with visible light has been discovered. Recombination nature of the AG was experimentally proven as in the case of UV irradiation. Features of the observed AG spectra were analyzed in comparison with the photo-, electro-, and thermolum…
Thin films of Pr0.5Ca0.5MnO3 were fabricated on (001) oriented SrLaAlO4, NdGaO3, and SrTiO3 substrates using a hybrid solution route and spin coating techniques. Good crystalline and epitaxial quality of the films was confirmed with X-ray diffraction and transmission electron microscopy studies. Strain in the film gro…
Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.
Boron-nitride nanotubes can be thought of as rolled sheets of plane hexagonal boron-nitride. In this paper a computationally efficient modeling approach is pursued. The honeycomb-like structure of the lattice is exploited and a special finite element is developed based on this hexagonal pattern. The internal energy is…
The interest in functional ceramic coatings based on low cost and flexible manufacturing has been heightened by the effectiveness shown by chemical solution deposition of metal-organic salts, usually based on the use of spin coating, dip coating, or slot die coating techniques prior to thermal treatment to achieve dec…
The sub-terahertz passive radiometric imaging systems based on the single channel design are developed for disclosure of dangerous objects concealed under persons' clothing in short distances and for passive visualization of remote targets. Antenna systems, such as based on aspheric lens and on parabolic reflector, we…
Abstract In this study, nine ternary blends of polypropylene (PP)/poly [styrene-b-(ethylene-co butylene)-b-styrene] tri-block copolymer (SEBS)/polycarbonate (PC) were produced at different processing conditions through twin screw extruder. Accordingly, die temperature, screw speed, and blending sequences were altered…