The purpose of this study was to investigate the deposition of the hydroxyapatite (HA) coating via the electrophoresis procedure. The HA deposition was performed in an ethanol, methanol, acetone and isopropanol suspension. Methanol was found to be the best deposition media. Among the different environmental conditions, including the encapsulation of the samples under two vacuum types of pressure (10-5-10-4 and 2x10-2 Torr) and also the purge of the argon gas in the tube-like furnace, the optimum environment was the one demonstrating the encapsulation under the vacuum pressure of 2x10-2 Torr (washing with argon gas of 99.9% purity). After the examination of 3 sintering temperatures (1020, 1050 and 1100oC), the sintering temperature at 1050oC illustrated the most desired results. The samples sintered under these conditions were apparently intact, most of the interfacial part of the coating was found to be attached to the substrate surface irregularities and no single cracks were observed.

in this paper, kinetics of DC electrophoretic deposition (EPD) of carbon nanotubes (CNTs) are investigated. Suspension of carbon nanotubes in pure ethanol with addition of magnesium nitrate was used as deposition media. The effect of main EPD parameters such as deposition time, applied voltage and the CNTs concentration on deposit yield were investigated. The variation of current density vs. time and the effect of magnetic stirring were also examined. The results are in good agreement with Hamaker’s law and the deposit yield increases with increasing of applied voltage and CNTs concentration but there is a deviation from linear trend in longer deposition times. Stirring could compensate some of this deviation but increases the current density fluctuations.

A homogenous TiO2 / multi-walled carbon nanotubes(MWCNTs) composite film were prepared by electrophoretic co-deposition from organic suspension on a stainless steel substrate.  In this study, MWCNTs was incorporated to the coating because of their long structure and their capability to be functionalized by different inorganic groups on the surface. FTIR spectroscopy showed the existence of carboxylic groups on the modified carbon nanotubes surface. The effect of applied electrical fields, deposition time and concentration of nanoparticulates on coatings morphology were investigated by scanning electron microscopy. It was found that combination of MWCNTs within TiO2 matrix eliminating micro cracks presented on TiO2 coating. Also, by increasing the deposition voltages, micro cracks were increased. SEM observation of the coatings revealed that TiO2/multi-walled carbon nanotubes coatings produced from optimized electric field was uniform and had good adhesive to the substrate.

The aim of this work was to use the electrophoretic deposition (EPD) technique for the deposition of nano-” TiO2” layers directly on an SS316L substrate. The nano-” TiO2” films were deposited on an SS316L alloy with various parameters, such as potential, time of deposition and annealed temperature— the optimum parameters required for the development of stable nano-” TiO2” layer coating. The results obtained from the X-ray diffraction (XRD) and FESEM tests in this study showed that the “ TiO2” layers sintered at 400 ° C were amorphous. The XRD patterns showed the anatase phase at 600 ° C for 1 h. The heat treatment of “ TiO2” layers led to good adhesion with the SS316L alloy. The heat treatment above 500 ° C led to the agglomeration of nano-” TiO2” layers from 28 nm to 78 nm at 600 ° C. The thickness of the nano-” TiO2” coating increased with the deposition time and potential. The optimum thickness of the nano-” TiO2” coating on the SS316L alloy was 50 μ m at 5 min and 30 V. The increase in coating thickness with the time and potential of deposition led to problems, including increases in roughness and weak adhesion of the coating layer.