Electrical breaking down of barrier anodic films during their formation

Growth of anodic TiO2 nanotubes in mixed electrolytes and novel method to extend nanotube diameter

“…1a. However, the typical voltage-time curves of CATF include only one stage, the voltage always maintains a rising trend until the occurrence of oxide breakdown [26,[40][41][42]. The voltage-time curve in Fig.…”

“…In order to obtain self-ordered nanotubes, the applied voltage is always lower than the oxide breakdown voltage (U B ) . That is the reason why oxide breakdown process can be hardly observed in constant voltage anodization, while the breakdown process can be easily observed during constant current anodizing process when the voltage keeps increasing and reaches the U B [25,26,[40][41][42]. A more detailed discussion of the nanotube growth concerning the breakdown mechanism and the acquisition of voltage-time curves in the mixed electrolytes will be presented in this article.…”

Characterization of electrical discharges during spark anodization of zirconium in different electrolytes

“…Generally, this process is characterized by the presence of electrical microdischarges over the electrode surface, reduction of anodization rate (dE/dt) and appearance of potential oscillations associated with localized destruction/rebuild processes at the oxide film [5,42]. Fig.…”

Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid

“…On the other hand, two models were suggested to explain spark discharging. According to the first model [21,22], the appearance of spark discharging comes as a consequence of dielectric breakdown of the oxide layer in a strong electric field (∼10 7 V/cm), while the second model [23,24] considers spark discharging as gas discharging occurring in micropores of the oxide films. Atomic and ionic lines in luminescence spectrum during spark discharging generally originate from the species present in the substrate and in the electrolyte.…”