Characterization of Al2O3–TiO2 nano porous solar absorbers derived via MAO/sol-gel hybrid process

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

“…Results show that only anatase phase forms at 250 V. Since this voltage was not strong enough to compel alumina particles to incorporate into coatings in large volumes, the alumina characteristic peaks remained latent in this voltage. Anatase forms due to the electrochemical oxidation of titanium substrates in alkali media (sodium phosphate electrolyte) through to the following reactions [18,19,49,54]:…”

“…Furthermore, for the sample 450A1, a high amount of rutile titanium oxide formed owing to the generated heat on the surface which, in turn, is because of the increased electric current passing the electrochemical cell. For the sample 450A3, the tialite phase also formed through the equation (5), which is a result of the simultaneous fulfillment of both thermodynamics (heat) and kinetics (the presence of enough Al 2 O 3 nanoparticles) conditions [19,49].…”

“…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].…”

“…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]. To improve wear, corrosion and photocatalytic properties of valve metals including Al [7,28,29], Ti [4,[30][31][32][33], Mg [1,[34][35][36][37], and Zr [38][39][40], surface oxidation techniques, such as Micro Arc Oxidation have been successfully used.…”

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

“…MAO coatings on titanium alloys are effective as chemical barriers against the release of metal ions from the substrates and can enhance the corrosion resistant of titanium alloys [49]. MAO is an efficient process enabling us to fabricate ceramic coatings with different chemical compositions in only one step [50][51][52][53][54][55][56][57][58].…”