An innovative technique to simply fabricate ZrO2–HA–TiO2 nanostructured layers

How deposition parameters affect corrosion behavior of TiO2-Al2O3 nanocomposite coatings

“…Advantages like a short processing time, biocompatibility, ability to control phase composition and surface morphology, and high coating thicknesses [4,41,42,44,45] distinguish this method from other conventional methods. The applied voltage in MAO process usually is in the order of hundreds of volts resulting in a strong electric field between anode and cathode (about 10 2 V m −1 between the anode and cathode and it may increase up to 10 6 V m −1 across the interface metal/oxide/electrolyte) [41][42][43]46] forcing insoluble charged particles in the electrolyte to move towards electrodes with opposite charge due to the electrophoretic effects [11,29,41,47]. For example, if the electrolyte contains insoluble negatively charged particles, a composite coating consisted of an oxide matrix with the dispersed ceramic particles forms on the surface of anode [11,29,48,49].…”

“…The applied voltage in MAO process usually is in the order of hundreds of volts resulting in a strong electric field between anode and cathode (about 10 2 V m −1 between the anode and cathode and it may increase up to 10 6 V m −1 across the interface metal/oxide/electrolyte) [41][42][43]46] forcing insoluble charged particles in the electrolyte to move towards electrodes with opposite charge due to the electrophoretic effects [11,29,41,47]. For example, if the electrolyte contains insoluble negatively charged particles, a composite coating consisted of an oxide matrix with the dispersed ceramic particles forms on the surface of anode [11,29,48,49]. This new fabrication technique is called Electrophoretic Enhanced Micro Arc Oxidation (EEMAO) which has the advantage of both micro arc oxidation and electrophoretic deposition methods [10,48,49].…”

“…Ceramic coatings have been recently found promising for a variety of industrial applications in order to improve wear resistance [1][2][3], corrosion resistance [4][5][6][7][8], heat resistance [9], biocompatibility [10][11][12][13], and photocatalystic activity [14][15][16][17][18][19] of metals and alloys. These coatings are fabricated by different techniques such as oxidation of the metal surfaces [3,[20][21][22], sol-gel process [19], vapor phase deposition [23,24], electrophoresis [25], and thermal spray [26,27].…”

Fabrication and characterization of nano-HA-45S5 bioglass composite coatings on calcium-phosphate containing micro-arc oxidized CP-Ti substrates

“…In this respect, chemical compounds also can be incorporated from Ca and P containing electrolytes to enhance high biocompatibility and cell attachment [30][31][32]. Most of previous works were focused on one-step approach for utilizing MAO and EPD at the same time [33][34][35][36]. They used one suspension/electrolyte solution and both of these processes were performed simultaneously for the final coating [33][34][35][36].…”

“…Most of previous works were focused on one-step approach for utilizing MAO and EPD at the same time [33][34][35][36]. They used one suspension/electrolyte solution and both of these processes were performed simultaneously for the final coating [33][34][35][36]. Nie et al [37] developed a double layer HA/TiO 2 coating on titanium alloys with HA as the top layer and a dense TiO 2 film as the inner layer to improve biochemical stability in the corrosive environment of the human body via a hybrid combination of micro-arc oxidation and electrophoretic deposition.…”