Tribological properties of Al-GNP composites at elevated temperature
Abstract Lighter and more powerful next generation vehicles and other rotary machinery demand bearings to operate in harsher conditions for higher efficiency, and the continuous development of advanced low-wear and friction materials is thus becoming even more important to meet these requirements. N...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-02-01
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| Series: | Friction |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40544-023-0839-2 |
| _version_ | 1797273264540614656 |
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| author | Sunil Poudel Rizwan Bajwa Yongde Xia Zakir Khan Yi Zhang Yanqiu Zhu |
| author_facet | Sunil Poudel Rizwan Bajwa Yongde Xia Zakir Khan Yi Zhang Yanqiu Zhu |
| author_sort | Sunil Poudel |
| collection | DOAJ |
| description | Abstract Lighter and more powerful next generation vehicles and other rotary machinery demand bearings to operate in harsher conditions for higher efficiency, and the continuous development of advanced low-wear and friction materials is thus becoming even more important to meet these requirements. New aluminium composites reinforced with high performance lubricate phases such as graphene nanoplatelets (GNPs) are very promising and have been vigorously investigated. By maintaining a low coefficient of friction (COF) and offering great strength against wear due to their self-lubricating capability, the solid lubricant like GNPs protect the bearing surface from wear damage and prevent change in metallurgical properties during temperature fluctuations. This paper first studies the high-temperature tribological performance of aluminium matrix composites reinforced with GNP, consolidated via powder metallurgy, then elucidates their tribological mechanism. We report that the best tribological performance is achieved by the composite containing 2.0 wt% GNP, with an extraordinarily low COF of 0.09 and a specific wear rate of 3.5×10−2 mm3·N−1·m−1, which represent 75% and 40% reduction respectively, against the plain aluminium consolidated under identical conditions. The in-track and out-of-track Raman analysis have confirmed the role of GNPs in creating a tribofilm on the counterpart surface which contributed to the excellent performance. |
| first_indexed | 2024-03-07T14:41:56Z |
| format | Article |
| id | doaj.art-a66c4c5d2f6540e7a8993e2a153b969a |
| institution | Directory Open Access Journal |
| issn | 2223-7690 2223-7704 |
| language | English |
| last_indexed | 2024-03-07T14:41:56Z |
| publishDate | 2024-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Friction |
| spelling | doaj.art-a66c4c5d2f6540e7a8993e2a153b969a2024-03-05T20:19:33ZengSpringerOpenFriction2223-76902223-77042024-02-011251028104110.1007/s40544-023-0839-2Tribological properties of Al-GNP composites at elevated temperatureSunil Poudel0Rizwan Bajwa1Yongde Xia2Zakir Khan3Yi Zhang4Yanqiu Zhu5College of Engineering, Mathematics and Physical Sciences, University of ExeterEuropean Technical Centre, Daido Metal Co., Ltd.College of Engineering, Mathematics and Physical Sciences, University of ExeterEuropean Technical Centre, Daido Metal Co., Ltd.European Technical Centre, Daido Metal Co., Ltd.College of Engineering, Mathematics and Physical Sciences, University of ExeterAbstract Lighter and more powerful next generation vehicles and other rotary machinery demand bearings to operate in harsher conditions for higher efficiency, and the continuous development of advanced low-wear and friction materials is thus becoming even more important to meet these requirements. New aluminium composites reinforced with high performance lubricate phases such as graphene nanoplatelets (GNPs) are very promising and have been vigorously investigated. By maintaining a low coefficient of friction (COF) and offering great strength against wear due to their self-lubricating capability, the solid lubricant like GNPs protect the bearing surface from wear damage and prevent change in metallurgical properties during temperature fluctuations. This paper first studies the high-temperature tribological performance of aluminium matrix composites reinforced with GNP, consolidated via powder metallurgy, then elucidates their tribological mechanism. We report that the best tribological performance is achieved by the composite containing 2.0 wt% GNP, with an extraordinarily low COF of 0.09 and a specific wear rate of 3.5×10−2 mm3·N−1·m−1, which represent 75% and 40% reduction respectively, against the plain aluminium consolidated under identical conditions. The in-track and out-of-track Raman analysis have confirmed the role of GNPs in creating a tribofilm on the counterpart surface which contributed to the excellent performance.https://doi.org/10.1007/s40544-023-0839-2nanocompositegraphene nanoplatelet (GNP)tribologypowder metallurgy |
| spellingShingle | Sunil Poudel Rizwan Bajwa Yongde Xia Zakir Khan Yi Zhang Yanqiu Zhu Tribological properties of Al-GNP composites at elevated temperature Friction nanocomposite graphene nanoplatelet (GNP) tribology powder metallurgy |
| title | Tribological properties of Al-GNP composites at elevated temperature |
| title_full | Tribological properties of Al-GNP composites at elevated temperature |
| title_fullStr | Tribological properties of Al-GNP composites at elevated temperature |
| title_full_unstemmed | Tribological properties of Al-GNP composites at elevated temperature |
| title_short | Tribological properties of Al-GNP composites at elevated temperature |
| title_sort | tribological properties of al gnp composites at elevated temperature |
| topic | nanocomposite graphene nanoplatelet (GNP) tribology powder metallurgy |
| url | https://doi.org/10.1007/s40544-023-0839-2 |
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