Showing papers in "Vacuum in 2016"

TL;DR: In this paper, approximated examples of the use of the electron beam are given by the welding, rapid prototyping, texturing surface, cladding with wire and powder as well as alloying.

TL;DR: In this paper, the structure, adsorption, electronic states, and charge transfer of ozone (O 3 ) and sulfur dioxide (SO 2 ) molecules on the surface of Pt-decorated graphene (PtG) using density functional theory (DFT).

TL;DR: In this paper, the effects of low temperature plasma nitriding on the characteristics of different austenitic stainless steels, CrNi-based (AISI 304L and AISI 316L) and CrMn-based, were compared, and their microstructure, phase composition, microhardness and corrosion resistance were evaluated.

TL;DR: In this paper, a density functional theory (DFT) analysis of four X 12 Y 12 semiconductors (Al 12 N 12, Al 12 P 12, B 12 N 6 12, and B 12 P 6 12 ) was performed at B3LYP/6-31G(d,p) level of theory.

TL;DR: In this article, the effects of screw speed, feeder speed, and GNP content on the electrical, thermal and mechanical properties of composites were investigated, and the inclusion of GNPs in the matrix improved the thermal stability and conductivity by 2.7% and 43%, respectively.

TL;DR: WO3 nanofibers with a porous morphology were successfully prepared through electrospinning method with subsequent calcination, and the morphology and structure were investigated via X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscope, and selected area electron diffraction.

TL;DR: In this article, a nano-silica (SiO2)/graphene oxide (GO) coating was deposited on Mg alloy via physical vapor deposition (PVD) combined with dip coating.

TL;DR: In this article, density functional theory calculations have been performed to study the adsorption of hydrogen on the surface of pristine and nickel decorated Al12N12 and Al12P12 nano-cages.

TL;DR: In this paper, a resistance switching memory based on organic/inorganic hybrid perovskites (OIHPs) was fabricated using a two-step spin-coating procedure.

TL;DR: In this article, a powder metallurgy Cu-1Cr-0.65Zr alloy was fabricated using Cu, Cr, and ZrH2 powders as initial materials by hot pressing at 950°C for 4h under 27.7 MPa.

TL;DR: In this article, the effect of beam offset on the joint strength was studied and the results showed that beam offset is flexible and allowed to be in the range of 0.2mm to 1mm.

TL;DR: In this article, a double layer coating was prepared on biodegradable Mg-Ca alloy by microarc oxidation (MAO) followed by dip coating process, which showed that hydrophobic poly-lactic acid (PLA) as a top layer with thickness of 37-40μm provides significantly higher corrosion resistance in terms of corrosion current and charge transfer resistance, while the MAO coating alone (8-10μm) exhibits lower corrosion resistance.

TL;DR: In this article, the microstructure evolution and strengthening mechanisms of pure titanium processed by high energy shot peening (HESP) have been studied and the results show that the deformation layer is formed on the surface and the micro-structure exhibits with the equiaxed 20-40μm grains in the matrix after HESP.

TL;DR: In this article, a low-temperature X-ray photoelectron spectra of fast-frozen wet pastes prepared by centrifugation of the natural sphalerite slurries containing potassium n-butyl xanthate (KBX), without washing or any additional treatment, before and after the mineral activation in 0.1 mM CuSO4 solution was obtained.

TL;DR: In this article, a silver-reduced graphene oxide (Ag-rGO) nanocomposite was prepared in the presence of Isopropyl alcohol (IPA) and polyvinyl pyrrolidone (PVP) by gamma irradiation assisted method.

TL;DR: In this article, the adsorption of an HCl molecule on the exterior and interior surface of a carbon nanocone (CNC) was studied using density functional theory calculations, indicating that its electrical conductivity is significantly changed in the presence of HCl and might be used in HCl sensors.

TL;DR: In this paper, the microstructure, mechanical properties and corrosion resistance of the Al 2 O 3 thin films deposited on hot work tool steel substrate are presented in the comprehensive investigation results.

TL;DR: In this article, the effect of Si on the structure and properties of CrAlN coating was investigated, and the solid solution of Si into CrAlNs was shown to promote the w-AlN growth, and thus results in a structural transition from Cr 0.48 Al 0.52 N with single phase cubic structure to Cr 0 42 Al 0., 0.54 Si 0.09 N with mixed cubic-wurtzite structure.

TL;DR: In this paper, film growth rates during DCMS and HIPIMS sputtering in Ar are measured for ten technologically-relevant elemental target materials: Al, Si, Ti, Cr, Y, Zr, Nb, Hf, Ta, and W, spanning wide range of masses, ionization energies, and sputter yields.

TL;DR: In this article, the sensitivity and reactivity of open edge zigzag and armchair graphene slabs toward CO 2 gas, using density functional theory calculations, were investigated and the results reproduce and explain the electrical behavior which has been observed experimentally from the graphene upon the exposure to the CO2 gas.

TL;DR: In this article, the crystal phases and orientations of Ga2O3 thin films were investigated by RF magnetron sputtering on sapphire C-planes and A-planes in an O2 or H2O vapor ambient.

TL;DR: In this paper, copper oxide (CuO/Cu2O) nanocrystalline thin films were deposited by radio frequency (RF) magnetron sputtering system at 75 and 100 W. The surface, optical, composition and structural properties of obtaining samples were characterized by using atomic force microscopy (AFM), UV-Vis spectrophotometer, field emission scanning electron microscopy and X-ray diffraction (XRD).

TL;DR: In this paper, the reactivities of pure monolayer MoS 2 nanosheet doped with non-metal elements X (X = B, P, Cl) in the presence of NO were investigated.

TL;DR: In this article, a thorough investigation of the TiO 2 /FTO film properties was carried on, varying the process temperature in the range (150-400)°C and keeping fixed at 2000 the number of reaction cycles.

TL;DR: In this article, the authors examined the sudden drop in properties of aluminum, titanium and chromium thin films prepared by the glancing angle deposition method and found that the critical point is around 60° for all metallic materials and a critical angle of 60° is also found for the residual stress.

TL;DR: A review of the major current explorations of graphene on SiC in electronic devices, such as field effect transistors (FET), radio frequency (RF) transistors, integrated circuits (IC), and sensors is presented in this article.

TL;DR: In this article, the effect of activated carbon (AC) addition on the H2O2 formation and dye decoloration in pulsed discharge plasma (PDP) system with circulating solution was investigated.

TL;DR: In this article, the influence of a pressure of gas mixture on an average size of copper oxide nanoparticles, produced in the plasma of low pressure arc discharge, has been studied as a basic process variable.

TL;DR: In this paper, the authors performed a density functional theory study to investigate the storage of hydrogen molecule on the interior and exterior of C 3 N nanotubes (C 3 NNTs).

TL;DR: In this article, the effect of plasma nitriding parameters, namely, time and temperature, on the closure of the cracks was investigated, and the results showed that the corrosion resistances of the samples modified by the CPN process were superior to the ASPN samples.