Current-carrying friction in carbon coated ball bearing
| Autor: | Peidong Xue, Cheng Chen, Xue Fan, Dongfeng Diao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Friction, Vol 11, Iss 11, Pp 2008-2020 (2023) |
| Druh dokumentu: | article |
| ISSN: | 2223-7690 2223-7704 |
| DOI: | 10.1007/s40544-022-0704-8 |
| Popis: | Abstract In this work, we proposed a method for coating the whole surfaces of bearing balls uniformly by carbon film with a rotatable ball clamp. We studied the carbon/carbon friction with a self-designed current-carrying ball bearing friction test system. A notable and instant friction force drop of 28% and significant carbon film wear alleviation were found when currents were applied. By using TEM-, SEM-, and EDS-analysis, special carbon stacks with a mixture of large wear particles and oxide were found in the wear areas under current applied condition. We elucidated the current-carrying friction mechanisms as follows: (1) wear particles formation; (2) wear particles charged by tribomicroplasma; (3) formation of surface passivated carbon stacks under electric force; (4) sliding between passivated carbon surfaces. This work may facilitate the development of novel solid-lubricated ball bearings and lay some foundations for current-carrying rolling friction. |
| Databáze: | Directory of Open Access Journals |
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