Discovery of Al2O3 particles incorporation mechanism in plasma electrolytic oxidation of AM60B magnesium alloy

An improvement of the wear and corrosion resistances of AZ31 magnesium alloy by plasma electrolytic oxidation in a silicate–hexametaphosphate electrolyte with the suspension of SiC nanoparticles

“…The incorporation of the nanoparticles into coating by PEO in electrolytes with the suspension of nanoparticles has been discussed by a variety of authors [11][12][13]33]. It is generally accepted that there are three mechanisms or their combinations for incorporation, namely, direct deposition, electrophoresis or mechanical entrapment [12].…”

“…The negatively charged nanoparticles can move toward the anode due to the electrophoresis effect, then the high local temperature of discharges melted and sintered the nanoparticles into the coating [13]. In a recent work of Li et al [33], a chemical reaction mechanism was proposed for the incorporation of Al 2 O 3 into the PEO coating on AM60B magnesium alloy. However, they did not exclude the possibility of mechanical trapping mechanism or their combinations.…”

Preparation of a Modified Micro-arc Oxidation Coating Using Al2O3 Particles on Ti6Al4V

“…The moving Al 2 O 3 particle is adsorbed on the sample surface and penetrates into the melting material [25]. The melting points of titanium dioxide and aluminum oxide both approach 2100 K; thus, penetrating Al 2 O 3 fuses and solidifies with the melting TiO 2 .…”

Effect of ZrO2 particle on the performance of micro-arc oxidation coatings on Ti6Al4V

“…A c c e p t e d M a n u s c r i p t 5 3.2 The weight gain of coating with the addition of ZrO2 particle [22]. With the increase of the ZrO 2 particle added in electrolyte, more ZrO 2 particles were involved in the coatings in the process of partial melting recrystallization.…”