Electrodeposition of nanostructured Ti/(Ru+Ti+Ce)O_2 coatings

A nanostructured ternary coating of Ti/(Ru + Ti + Ce)O_2 was prepared by the conventional electrodeposition on the titanium substrate as the cathode with different numbers of coating layers. The main objective of this work was to study nanostructured coatings of ceramic materials. For this purpose, the amount of precursor materials in the electrolyte was a variable parameter. Furthermore, the salt of TiCl_4/RuCl_3·xH_2 O/Ce(NO_3)_3·6 H_2 O with different amounts, hydrogen peroxide, methanol, and distilled water were used as an aqueousunaqueous bath. In addition, the coated samples were put to heat at 300, 450, 650, and 850℃ in an electric furnace for1 h. The crystalline phase of the coating was characterized by X-ray diffraction(XRD). The chemical composition and microstructure of the coating were studied using energydispersive spectroscopy(EDS) and scanning electron microscopy analysis(SEM). Moreover, the electrochemical measurement of Ti/(Ru + Ti + Ce)O_2 coatings was carried out. Results show that with the increase in the number of coating layers, the quality of morphology is improved.Then, the best quality of coatings is obtained at six layers on the titanium substrate with electrolyte including TiO_2/RuO_2/CeO_2 with the molar ratio of 70:5:25 after heat treatment at 450 ℃ for 1 h. Besides,with the increase in Ce02 content from 5 wt% to 25 wt% and the number of coating layers, higher thickness of about(20.0±0.1) μm and minimum over potential for chlorine evolution were obtained.     

On the Maximal Output Admissible Set for a Class of Bilinear Discrete-time Systems

International Journal of Control, Automation and Systems - Given a discrete-time controlled bilinear systems with initial state x0 and output function yi, we investigate the maximal output set...     

Design,Simulation and Analysis of a High Gain Small Size Array Antenna for 5G Wireless Communication

Wireless Personal Communications - Microstrip antennas have become a part and parcel of today’s wireless communication world because of their low profile, low cost and ease of fabrication in...     

Influence of BaO Doping on the Structural,Ac Conductivity,and Dielectric Properties of BiFeO3 Multiferroic Nanoparticles

Journal of Inorganic and Organometallic Polymers and Materials - The Bi1?xBaxFeO3 (BiBaFeO3) multiferroic nanoparticles with different Ba molar concentrations were fabricated in reliance on...     

Enhancement of melt-spun process Bi–Ag lead-free solder for high temperature applications

The enhancement of lead free solders has emerged as one of the most important issues in the electronics assembling industries. Bi–Ag hypo and eutectic alloys have been considerd as one of the lead free solders that can replace the Pb–Sn solder for high temperature applications. This study investigates the effect of various compositions of silver on the mechanical, thermal and electrical properties of the melt-spun process Bi–Ag hypo and eutectic alloys was directionally solidified using copper wheel technology.The microhardness (Hv), creep resistance were measured from solidified ribbons.The results showed that presence of α-Bi phase, Ag_99.5Bi_0.5 (with a cubic structure Fm-3m) and Ag_0.97Bi_0.03 (with a cubic structure Fm-3m) embedded in Bi matrix. Furthermore, the eutectic composition Bi—2.5 wt% Ag shows the more regular microstructure than hypo eutectic composition. It is also concluded that the solderability of solder is significantly imported due to the surface tension of molten Bi–Ag lead-free solder decreases with the Ag content. The obtained results show a surprising desirable decrease in melting temperature with increasing Ag from 269 to 261 °C. Also, it was found that the eutectic composition Bi—2.5 Ag exhibit good mechanical properties superior to hypo-eutectic composition.     

Camera self-calibration having the varying parameters and based on homography of the plane at infinity

Multimedia Tools and Applications - In this approach, we will process a self-calibration problem of camera characterized by varying parameters. Our approach is based on estimating of homography of...