Research Article
The Tribological Behavior of Nanocrystalline TiO2 Coating Produced by Plasma Electrolytic Oxidation
Table 2
The parameters of different coating processes on Ti.
| | Sample | Current type | Current density (mA.Cm-2) | Frequency (Hz) | Duty cycle (%) | Coating time (min) | Ultimate voltage (V) | Sparking time (s) | Sparking voltage (V) |
| | B | Square unipolar pulsed current | 100 | 500 | 10 | 10 | 255 | 15 | 212 | | B1 | Square unipolar pulsed current | 100 | 1500 | 10 | 10 | 262 | 17 | 227 | | B2 | Square unipolar pulsed current | 100 | 500 | 20 | 10 | 247 | 18 | 192 | | B3 | Direct current | 100 | — | — | 10 | 145 | 5 | 110 |
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