Materials Literature
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Graphene is a newly discovered material that possesses unique electronic properties. It is a two-dimensional singlelayered sheet in which the electrons are free and quasi-relativistic. These properties may open a door for many new electronic applications. In this paper we proposed a flat 2-dimensional circular graphen…
The effects of the pre-treatment of commercially available powder by high energy ball milling on the densification of highly refractory ZrB2 were investigated. The pristine powder could be crushed into 10 nm in size by high energy ball milling. The resultant powder was densified, using spark plasma sintering apparatus…
Polyvinyl chloride (PVC) was mixed with natural rubbers which are liquid natural rubber (LNR), liquid epoxidised natural rubber (LENR) and liquid epoxidised natural rubber acrylate (LENRA) for a preparation of a fine nonwoven fiber's mat. PVC and each natural rubbers(PVC:LENR, PVC:LNR and PVC:LENRA) were mixed based o…
A novel intrauterine devices material, polyurethane/nano‐copper (PU/NC) nanocomposite, was prepared. The structure, morphology, copper ion (Cu 2+ ) release rate, and water absorption of PU/NC nanocomposites were investigated. The results indicated that the nanocoppers were uniformly dispersed in the matrix. The releas…
In this study, we examined the ordering of 2D colloidal particle monolayer structures formed atop polyelectrolyte multilayers (PEM) constructed by layer-by-layer deposition. We focused on the interactions between the particles and the substrate surface by changing the top layer of PEMs, along with the fabrication proc…
This paper reports results of a detailed study of the effects of the crystallographic orientation on the performance of the 2–2 parallel-connected composites based on relaxor-ferroelectric single crystals of 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3. These single crystals are poled along one of the following directions in the p…
The final outcome of an impact event (crater size, penetration depth) can be affected greatly by damage accumulation at early stages of the impact event when non-tensile stress states dominate. We have conducted hypervelocity impact experiments on bonded basalt/pyrex specimens utilizing high speed imaging to investiga…
The purpose of this study is to develop a new method for designing compression sportswear from the viewpoint of force by simulation. Applied simulation techniques are 1) skin strain simulation, 2) fabric strain simulation using the anisotropic hyperelastic model, and 3) musculoskeletal simulation. For skin strain simu…
The coalescence process of two gold nanoparticles was observed in situ by High Resolution Transmission Electron Microscopy (HRTEM). The observations reveal that the gold nanoparticles coalesced into one at room temperature. The HRTEM images show the relative rotation of the gold nanoparticles in order to align their c…
Anticorrosion protection on the basis of water-thinnable paint systems belongs among one of ecological ways of protection of metal parts. The aim of the experiment was to test corrosion resistance of water-thinnable systems Eternal antikor speciál V9503 and Colorlak aquarex V2115 in the salt spray environment accordin…
The effect of temperature on ferroelectric properties of the 1 mol% Mn-doped 0.75BF-0.25BT ceramic was investigated under an electric field at various temperatures (−20 to 200°C). An electric field (sine wave) of 52 kV/cm at 50 Hz was applied to the sample. The effect of temperature was represented as the changed of p…
In the present work, SrFe0.5Nb0.5O3 (SFN) ceramics doped with calcium were synthesized via a solid state reaction technique. X-ray diffraction reveals that both the powders and ceramics have a pure-phase perovskite structure with orthorhombic symmetry. The dielectric properties and related parameters of the ceramics w…
Impurities incorporated into copper during electrochemical deposition have long been postulated to inhibit grain growth in narrow interconnects. In this article we examine an alternative possible origin for the microstructural differences observed between narrow and wide lines. Specifically, the iPVD Cu seed layers in…
OBJECTIVE: Due to the rolling manufacturing process, most advanced high-strength steels (AHSS) demonstrate in-plane anisotropic material behavior. This study investigates the effects of material orientation on the axial crush behavior and fracture of AHSS with axial crush tests and computer simulations. METHODS: Crush…
The feasibility of using EDXRF for a rapid quantitative analysis of gold in tumor tissue has been investigated. The protocol described here demonstrates that sample biopsies can be analyzed in as little as 8 hours, with minimal sample preparation. Samples were prepared by drying a 35 μL aliquot of tissue dissolved in…
A comparative study of catalytic CO oxidation and selective CO oxidation over Pt/Al2O3 and CeO2-promoted Pt/Al2O3 catalysts has been investigated for the removal of a trace amount of CO from the reformed gas. The catalysts were prepared by sol gel and incipient wetness impregnation. CO oxidation and selective CO oxida…
In this paper, the dispersion stability of zirconium diboride (ZrB2) slurries and their anti-oxidation behavior to prevent re-oxidation in the ZrB2 slurries were studied.SPEX-milled ZrB2 powder was used to improve the dispersion stability, and the viscosity and zeta potential as a function of pH were measured in order…
The characteristics of gas tungsten arc weldments of in-situ reinforced titanium matrix composites were investigated, and the joint quality was evaluated by means of weld morphology, microstructure and tensile tests. With an increase of welding process parameters, sound welded joints were fabricated. The weld zone had…
Using the retrieved devices from one autopsy and five reoperations, the biocompatibility of explanted Talent stent-grafts was investigated to highlight the capacity of the fabric to act as an effective scaffold to regenerate a blood conduit. The autopsy device was encapsulated both internally and externally, but the c…
The first principle calculations have been performed to investigate the influence of elastic strain namely: uniaxial compression (−a), symmetrical biaxial compression (−a−b) and asymmetric biaxial (−a+b) stain, on the electronic structure of graphane in chair conformation. It is found that the band gap can be tuned by…