How to improve superlubricity performance of diketone at steel interface: Effects of oxygen gas
Abstract Achievement of steady and reliable super-low friction at the steel/steel contact interface, one of the most tribological systems applied for mechanical moving parts, is of importance for prolonging machine lifetime and reducing energy consumption. Here we reported that the superlubricity pe...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2022-08-01
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| Series: | Friction |
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| Online Access: | https://doi.org/10.1007/s40544-022-0631-8 |
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| _version_ | 1849406783999705088 |
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| author | Yuanyuan Jiang Lei Chen Chen Xiao Shumin Zhang Chenhui Zhang Ningning Zhou Tao Qin Linmao Qian Jiyang Zhang |
| author_facet | Yuanyuan Jiang Lei Chen Chen Xiao Shumin Zhang Chenhui Zhang Ningning Zhou Tao Qin Linmao Qian Jiyang Zhang |
| author_sort | Yuanyuan Jiang |
| collection | DOAJ |
| description | Abstract Achievement of steady and reliable super-low friction at the steel/steel contact interface, one of the most tribological systems applied for mechanical moving parts, is of importance for prolonging machine lifetime and reducing energy consumption. Here we reported that the superlubricity performance of the steel/steel sliding interface lubricated with tiny amounts of diketone solution strongly depends on the oxygen content in surrounding environment. The increase of oxygen not only significantly shortens the initial running-in time but also further reduces the stable coefficient of friction in superlubricity stage due to the enhancement of tribochemical reactions. On the one hand, more severe oxidation wear occurring at higher oxygen content facilitates material removal of the contact interface, lowering the contact pressure and the corresponding initial friction. On the other hand, the growth of iron ions during the shear process in high oxygen environment promotes the formation of chelate which acted as an effective lubricated film chemisorbed at the steel/steel friction interface to further lower the interfacial friction. The results provide a new opportunity to further optimize the tribological performance of diketone superlubricity system, especially towards the lubrication of mechanical engineering materials. |
| format | Article |
| id | doaj-art-50f1861ee6cb41f8aa93bfc469672ea0 |
| institution | Kabale University |
| issn | 2223-7690 2223-7704 |
| language | English |
| publishDate | 2022-08-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Friction |
| spelling | doaj-art-50f1861ee6cb41f8aa93bfc469672ea02025-08-20T03:36:17ZengTsinghua University PressFriction2223-76902223-77042022-08-0111692793710.1007/s40544-022-0631-8How to improve superlubricity performance of diketone at steel interface: Effects of oxygen gasYuanyuan Jiang0Lei Chen1Chen Xiao2Shumin Zhang3Chenhui Zhang4Ningning Zhou5Tao Qin6Linmao Qian7Jiyang Zhang8Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong UniversityTribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong UniversityTribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong UniversityState Key Laboratory of Tribology, Tsinghua UniversityState Key Laboratory of Tribology, Tsinghua UniversityBeijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms, Beijing Institute of Control EngineeringBeijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms, Beijing Institute of Control EngineeringTribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong UniversityBeijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms, Beijing Institute of Control EngineeringAbstract Achievement of steady and reliable super-low friction at the steel/steel contact interface, one of the most tribological systems applied for mechanical moving parts, is of importance for prolonging machine lifetime and reducing energy consumption. Here we reported that the superlubricity performance of the steel/steel sliding interface lubricated with tiny amounts of diketone solution strongly depends on the oxygen content in surrounding environment. The increase of oxygen not only significantly shortens the initial running-in time but also further reduces the stable coefficient of friction in superlubricity stage due to the enhancement of tribochemical reactions. On the one hand, more severe oxidation wear occurring at higher oxygen content facilitates material removal of the contact interface, lowering the contact pressure and the corresponding initial friction. On the other hand, the growth of iron ions during the shear process in high oxygen environment promotes the formation of chelate which acted as an effective lubricated film chemisorbed at the steel/steel friction interface to further lower the interfacial friction. The results provide a new opportunity to further optimize the tribological performance of diketone superlubricity system, especially towards the lubrication of mechanical engineering materials.https://doi.org/10.1007/s40544-022-0631-8superlubricityoxygen contentsteel/steel interfacediketonechelate |
| spellingShingle | Yuanyuan Jiang Lei Chen Chen Xiao Shumin Zhang Chenhui Zhang Ningning Zhou Tao Qin Linmao Qian Jiyang Zhang How to improve superlubricity performance of diketone at steel interface: Effects of oxygen gas Friction superlubricity oxygen content steel/steel interface diketone chelate |
| title | How to improve superlubricity performance of diketone at steel interface: Effects of oxygen gas |
| title_full | How to improve superlubricity performance of diketone at steel interface: Effects of oxygen gas |
| title_fullStr | How to improve superlubricity performance of diketone at steel interface: Effects of oxygen gas |
| title_full_unstemmed | How to improve superlubricity performance of diketone at steel interface: Effects of oxygen gas |
| title_short | How to improve superlubricity performance of diketone at steel interface: Effects of oxygen gas |
| title_sort | how to improve superlubricity performance of diketone at steel interface effects of oxygen gas |
| topic | superlubricity oxygen content steel/steel interface diketone chelate |
| url | https://doi.org/10.1007/s40544-022-0631-8 |
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