In the last decades, several anodizing processes for Mg alloys have been proposed to achieve a good wear and corrosion resistance combination. particular, Electro-Chemical Oxidation (ECO) showed an improved dense compact anodized layer compared other carried out above dielectric breakdown voltage, such as Plasma Electrolytic (PEO). However, influence of ECO treatment on tribological behavior cy...

In the present work, plasma electrolytic oxidation (PEO) is creatively introduced as a novel method to fabricate multi-layered nanospheres. Titanium (Ti) was oxidized in phosphate-based electrolyte containing ZnO nanoparticles (NPs), which results formation of nanospheres on ceramic coating. The as-fabricated nanosphere amorphous with three-layered architecture. inner layer contains Zn, Ca and ...

The paper compares the coatings produced by plasma electrolytic oxidation (PEO) on commercially pure titanium and a novel superelastic alloy Ti-18Zr-15Nb (at. %) for implant applications. PEO were both alloys in identical pulsed bipolar regime. properties of examined using scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive spectroscopy (EDX), potentiodynamic polariza...

The initial discharge process of plasma electrolytic oxidation (PEO) on the 60 vol. % SiCP/2009 aluminum matrix composite in silicate solution was situ monitored by sound and vibration measurement techniques. underwater sound, airborne sample signals were detected 120 s PEO process, their generation mechanism discussed. In terms waveforms spectrograms signals, can be divided into five stages: c...

This study investigates and compares plasma electrolytic oxidation (PEO) coatings produced on wrought Ti6Al4V alloy substrates with those resulting from electron beam powder bed fusion (PBF-EB). For a duration of 1000 s, phosphate/silicate electrolyte current density 50 A/cm2 was employed to fabricate the coatings. Surface polished cross-sections coated specimens underwent SEM X-ray diffraction...

The microhardness and abrasive wear resistance of cast Al-Si alloys after plasma-electrolytic oxidation (PEO) in a weakly alkaline basic electrolyte (3 g/L KOH + 2 Na2SiO3), as well with the addition H2O2, were determined. X-ray analysis showed that PEO layer comprises two oxide phases, namely α-Al2O3 γ-Al2O3, sillimanite -Al2O3 · SiO2 small percentage mullite -3 Al2O3 2SiO2. Silicon is present...

Thermal control ceramic coatings on Mg-Li alloys have been successfully prepared in silicate electrolyte system by plasma electrolytic oxidation (PEO) method. The PEO coatings are mainly composed of crystallized Mg2SiO4 and MgO, which have typical porous structure with some bulges on the surface; OES analysis shows that the plasma temperature, which is influenced by the technique parameters, de...

Abstract The rapid bio-corrosion of magnesium-based alloys, the formation hydrogen gas and, consequently, premature loss biomechanical functions hinder their applications as biodegradable implant materials. corrosion becomes even accelerated, when fretting wear occurs at junctions, a result repeated disruptions magnesium (hydr)oxide layer formed on surfaces. To improve overall performance these...

The addition of Cr nanoparticles to a plasma electrolytic oxidation (PEO) electrolyte offers the possibility producing layers with broader range coating compositions and improved properties. In this study, effects various voltages on formation, microscopic morphology, phase composition were investigated in situ incorporation into PEO-coated Mg alloy. results show that corrosion performance was ...

Discharge phenomena in electrolytes were discovered many decades ago. However, the research and development of plasma oxidation for surface engineering have only truly been actively performed recent years, particularly stimulated by a review paper entitled Plasma Electrolysis Surface Engineering published 1999. Among electrolysis processes, electrolytic (PEO) caught most attention from academic...