Abstract
Microarc oxidation (MAO) coating on Ti6Al4V alloy was treated in the electrolyte adding Cr2O3 microparticle. The influence of Cr2O3 particles on morphology, phase constituent and tribological behavior of MAO coatings was analyzed by SEM, XRD and wear test. The results show that the surface micropore of the composite coating decreases, the wear resistance improves, and the surface of composite coating appears Cr2O3 phase when Cr2O3 microparticles are added to MAO electrolyte. Besides, with increasing of Cr2O3 microparticle content in electrolytes, the thickness of the coating increases, and the X-ray diffraction peak of Cr2O3 phase enhances continuously, TiO2 phase decreases gradually, and then Al2TiO5 phase tends to disappear. The friction coefficient of the composite coating reduces gradually when Cr2O3 particle content increases from 0.5 g/L to 1.5 g/L. The composite coating exhibits good wear resistance when the content of Cr2O3 microparticle in electrolyte is 1.5 g/L.
Original language | English |
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Pages (from-to) | 180-185 |
Number of pages | 6 |
Journal | Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment |
Volume | 35 |
Issue number | 2 |
State | Published - Feb 2014 |
Keywords
- Composite coating
- Microarc oxidation
- Ti6Al4V alloy
- Tribological behavior