The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Tungsten (W) coatings with different copper (Cu) contents (15 vol.% and 25 vol.%) were fabricated by atmospheric plasma spray (APS) and vacuum plasma spray (VPS) technologies, respectively. Phase composition and microstructure of the composite coatings were characterized. Physical properties, including porosity, oxygen content, microhardness and density of the coatings were examined. Thermal properties,...
The effect of annealing temperature and duration on the growth and properties of Cu 2 SnS 3 films, deposited by co-evaporation of elemental Cu, Sn and S onto soda-lime glass substrates held at 350 °C is investigated. X-ray diffraction and Raman spectroscopy studies were used for phase identification. The as-deposited films are multi-phase containing Cu 2 SnS 3 and the...
TiSiN nanocomposite coatings were deposited on Si and cemented carbide substrates by cathodic arc ion plating in SiH 4 ambient. The effects of SiH 4 flow rate on microstructure, mechanical and tribological properties of the coatings were investigated systemically. Transmission electron microscopy and X-ray diffraction were employed to probe the crystalline microstructure and X-ray...
A sputter deposited Ni–Ti–Cu thin film was annealed for 1 h at 500 and 600 °C and its microstructure investigated by transmission electron microscopy and focused ion beam. Annealing at higher temperatures caused a remarkable microstructural evolution of the nanometric Ti(NiCu) 2 plate precipitates formed inside the grains. Precipitate coarsening occurred in the inner part of the grains according...
Praseodymium (Pr) is implanted into TiN coatings to improve the corrosion resistance and cytocompatibility in blood plasma. The corrosion resistance of the Pr-doped TiN coatings in blood plasma is improved based on electrochemical measurements. Pr ion implantation dramatically decreases the hemolysis rate of the TiN coatings suggesting their suitability in cardiovascular applications. The viability...
The modeling and design of a microwave plasma chemical vapor deposition (MPCVD) reactor with a conical-reflector cavity is presented. In the proposed reactor design, a mobilizable conical-reflector cavity, cylindrical reflector and mobilizable substrate were used to tune the system, which were different from the previous works. The electric field strength, plasma density, and tunability of the new...
TiC/WC nanomultilayers were prepared by multi-target magnetron sputtering device. The dependence of microstructure evolution and mechanical properties has been investigated. The results showed that “mutual growth effect” and “superhardness effect” were observed in the multilayers. The polytypic WC monolayer exhibited with both triclinic α-WC and cubic β-WC structure for the carbon loss in the sputtering...
The present study reports the fabrication of a nano-hydroxyapatite (HA) film on an AZ31 magnesium alloy via radio frequency (RF) magnetron sputtering. The phase composition, microstructure, and surface morphology of the HA coatings were investigated using X-ray diffraction and atomic force microscopy. The polarization tests in a 3.5 wt.% NaCl solution were performed to examine the corrosion behaviour...
We demonstrate that iron oxide in the form of hematite, suitable as absorption material in photoelectrochemical cells, can be produced by pulsed chemical vapour deposition. By choosing carbon monoxide or nitrogen as carrier gases in the process the phase and granularity of the grown material can be controlled. The choice of carrier gas affect the decomposition rate of iron pentacarbonyl used as iron...
Magnesium alloys surface modified by high-intensity pulsed ion beam irradiation are studied by MD simulation. The specimens containing defects were modeled to investigate the effect of high-intensity pulsed ion beam irradiation on surface area and defect size. It was found that the surface area mainly depend on the value of irradiation energy. The kinds of defects in the sub-surface have little influence...
Thin films of titanium dioxide (TiO 2 ) were synthesized with the help of plasma enhanced chemical vapour deposition (RF PECVD) technique, using titanium (IV) ethoxide and gaseous oxygen as precursor compounds. The glow discharge power and the flow rate of oxygen were used as process operational parameters. Phase composition of the films was studied with the X-ray diffraction (XRD) technique,...
An Al–Si/Al 2 O 3 coating was successfully prepared on the surface of the AZ91D magnesium alloy substrate by a new technology laser plasma hybrid spraying in this paper, and the influence of laser power on the structure and property of the coating was studied simultaneously. The performance of the coating, such as the morphology, porosity, phase composition, micro-hardness, was characterized...
In this work, we studied the effect of ultraviolet (UV) irradiation on the surface chemical states and tribological properties of the water–glycol lubricated Al–Mg–Ti–B coatings by pin-on-disk unidirectional sliding test and X-ray Photoelectron Spectroscopy (XPS). XPS results indicate that boric acid is present at both the wear track and unworn surface of the UV-irradiated Al–Mg–Ti–B coating, as opposed...
In this work, we report a facile approach to synthesis of highly fluffy and wrinkled reduced graphene oxide by simple freeze-drying and microwave-expanding method in vacuum. Compared with thermal reduced graphene oxide (RGO), the as-synthesized freeze drying and microwave reduced graphene oxide (FMGO) electrodes exhibit an improved electrochemical performance with high specific capacitance of 246 F g...
Indium tin oxide (ITO; Indium oxide with tin doping) nanowires were first prepared via the electrochemical deposition and an oxidization method based on an AAO template. FE-SEM results show the synthesized ITO nanowires to have an approximate length of 8–10 μm with an aspect ratio close to 167. ITO nanowires with an In/Sn weight ratio of 8.8 (∼9:1) were observed from EDS. The crystal structure of...
In this paper, nanostructured composite ceramic coatings (NCs) were prepared by supersonic plasma spray technology, and their surface, cross-section and fracture morphologies were observed by scanning electron microscope (SEM). The phase composition and high resolution morphology are analyzed by X-ray diffraction (XRD) and transmission electron microscope (TEM). In the final, the formation mechanisms...
This study focuses on the influence of joining method difference on the joint microstructure and properties. Unlike vacuum electron beam welding (EBW) utilizing electron beam as fusion heat source, rigid restraint thermal self-compressing bonding (TSCB), a new solid-state bonding method proposed by authors, employs vacuum electron beam as the non-melt heat source to bond materials in this work. Meanwhile,...
The hydrogen storage properties of Li-decorated graphene-like monolayer WS 2 have been systematically studied by using first principles calculations based on density functional theory. The present results bring to light that the pristine WS 2 is not suitable for storing hydrogen due to the very weak interaction between the pristine WS 2 sheet and the H 2 molecules....
We report various SF 6 /Ar plasma textured periodic glass surface morphologies with high transmittance, haze ratio, and root mean square (rms) roughness of ITO:Zr films for amorphous silicon thin film solar cells (a-Si TFSCs). SF 6 /Ar plasma textured glass surface morphologies contain micro- and nano-textured features that help to scatter the light in visible and near infra-red (NIR)...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.