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| Abstract: |
| On a self-developed circular-translation polishing machine, the influence of different electric potentials on the friction coefficient and wear properties of SiC/HT200 friction pair, which contacted as one electrode, were studied in NaOH solutions. The results show that the friction coefficient of SiC/HT200 pair is 0.25 under no externally applied potential; but it decreases to 0.23 while applying +3 V polarization potential on the pair; in contrast, it increases to 0.30 when applying -3 V polarization potential on the pair. And the polished SiC surface under +3 V potential is much smoother, while there are clear ploughing marks and adhesive region on the polished SiC surface under zero and -3 V potential, respectively. The mixed tribo-electrochemical friction model has been proposed and the mechanisms of the electric effects on the tribological properties of SiC/HT200 friction pair in NaOH electrolyte are addressed. Results and discussion show that the anodic passivation technique may be used for hastening the running-in process of SiC/Fe friction pairs, as well as for polishing SiC to increase its materials removal efficiency while maintaining good surface quality. |
| Key words: Silicon carbide tribo-electrochemical friction and wear passivation |
| DOI：10.11916/j.issn.1005-9113.2016.03.008 |
| Clc Number:TH177.1 |
| Fund: |
