Wear of an aluminium alloy coated by plasma electrolytic oxidation

Plasma Electrolytic Oxidation Coatings on Lightweight Metals

“…Treviño et al [38] investigated the wear of coatings on Al 6061 alloy fabricated by PEO treatment in Na 2 SiO 3 -KOH electrolyte. The coatings with different thickness of 100, 125 and 150 μm were fabricated and characterized.…”

An investigation of the characteristics of Al2O3/TiO2 PEO nanocomposite coating

“…Therefore, improving the mechanical properties of PEO coatings by introducing nanoparticles could be mostly attributed to the formation of the coatings with lower porosity content. Although the TiO 2 nanoparticles may enhanced the M a n u s c r i p t 16 precipitation of α-Alumina phase, which showed superior mechanical properties in comparison with γ-Alumina and Mullite phases [2,54,55], the effects of formation of this phase could not be comparable to the porosity content effects [56] on the mechanical properties.…”

“…A high local temperature and pressure are being produced on the substrate surface by plasma, forming a hard complex oxide film consisting of substrate metal and electrolyte constituents [1]. During PEO process, the potential reaches to amounts higher than the dielectric break-down voltage, thereby producing a hard alumina film [2]. The obtained alumina film is usually a coating with a dense polycrystalline α-alumina inner layer and a porous γ-alumina outer layer.…”

“…The obtained alumina film is usually a coating with a dense polycrystalline α-alumina inner layer and a porous γ-alumina outer layer. These thick films improve the wear resistance of the surface due to their high hardness and adherence [2,3].…”

Study of Plasma Electrolytic Oxidation Coatings on Aluminum Composites

“…The main layer of PEO coatings on aluminum alloys, generally, includes the corundum, α-Al 2 O 3 , which has high microhardness and provides good wear resistance [10,11,[18][19][20][21]. In particular, aluminum alloys with PEO coatings have a high wear resistance under sliding friction [22][23][24][25][26][27].…”