Metastable hybridized structure transformation in amorphous carbon films during friction—A study combining experiments and MD simulation
Abstract Amorphous carbon films have attracted substantial interest due to their exceptional mechanical and tribological properties. Previous studies revealed that the amorphous carbon films exhibited lower coefficient of friction (COF) because of the transformation in bond structure from sp3-C to s...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2023-03-01
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| Series: | Friction |
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| Online Access: | https://doi.org/10.1007/s40544-022-0690-x |
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| author | Yefei Zhou Zhihao Chen Tao Zhang Silong Zhang Xiaolei Xing Qingxiang Yang Dongyang Li |
| author_facet | Yefei Zhou Zhihao Chen Tao Zhang Silong Zhang Xiaolei Xing Qingxiang Yang Dongyang Li |
| author_sort | Yefei Zhou |
| collection | DOAJ |
| description | Abstract Amorphous carbon films have attracted substantial interest due to their exceptional mechanical and tribological properties. Previous studies revealed that the amorphous carbon films exhibited lower coefficient of friction (COF) because of the transformation in bond structure from sp3-C to sp2-C during friction processes. However, the mechanism for such a transformation during friction is not well understood. This study is conducted to get an insight into the metastable transformation in amorphous carbon film during friction by means of experiments and molecular dynamics (MD) simulation. Relevant wear tests showed that wear of the film changed from an abrasive wear mode to a mixture of abrasion and adhesive wear, resulting in a decrease in growth rate of the wear rate after the running-in stage. It is worth noting that the sp3-C atoms were increased during the running-in stage when the films contained lower sp3/sp2 ratios. However, the formed sp3-C atoms could only be short-lived and gradually transformed to sp2-C atoms with the graphitization generated on the wearing surface of the films. The radial distribution function and translational order parameter indicated that the films’ high sp3/sp2 ratio led to an increased sp2-C proportion on the wear scar after friction, which caused an increased structural ordering. |
| format | Article |
| id | doaj-art-45f3d0ea7dca41a1a4d2655d2b205af7 |
| institution | OA Journals |
| issn | 2223-7690 2223-7704 |
| language | English |
| publishDate | 2023-03-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Friction |
| spelling | doaj-art-45f3d0ea7dca41a1a4d2655d2b205af72025-08-20T01:51:10ZengTsinghua University PressFriction2223-76902223-77042023-03-011191708172310.1007/s40544-022-0690-xMetastable hybridized structure transformation in amorphous carbon films during friction—A study combining experiments and MD simulationYefei Zhou0Zhihao Chen1Tao Zhang2Silong Zhang3Xiaolei Xing4Qingxiang Yang5Dongyang Li6School of Mechanical Engineering, Yanshan UniversitySchool of Mechanical Engineering, Yanshan UniversitySchool of Mechanical Engineering, Yanshan UniversityState Key Laboratory of Metastable Materials Science & Technology, Yanshan UniversitySchool of Mechanical Engineering, Yanshan UniversityState Key Laboratory of Metastable Materials Science & Technology, Yanshan UniversityChemical and Materials Engineering Department, University of AlbertaAbstract Amorphous carbon films have attracted substantial interest due to their exceptional mechanical and tribological properties. Previous studies revealed that the amorphous carbon films exhibited lower coefficient of friction (COF) because of the transformation in bond structure from sp3-C to sp2-C during friction processes. However, the mechanism for such a transformation during friction is not well understood. This study is conducted to get an insight into the metastable transformation in amorphous carbon film during friction by means of experiments and molecular dynamics (MD) simulation. Relevant wear tests showed that wear of the film changed from an abrasive wear mode to a mixture of abrasion and adhesive wear, resulting in a decrease in growth rate of the wear rate after the running-in stage. It is worth noting that the sp3-C atoms were increased during the running-in stage when the films contained lower sp3/sp2 ratios. However, the formed sp3-C atoms could only be short-lived and gradually transformed to sp2-C atoms with the graphitization generated on the wearing surface of the films. The radial distribution function and translational order parameter indicated that the films’ high sp3/sp2 ratio led to an increased sp2-C proportion on the wear scar after friction, which caused an increased structural ordering.https://doi.org/10.1007/s40544-022-0690-xamorphous carbon filmmetastable transformationstructural ordermolecular dynamics (MD) simulationtribological performance |
| spellingShingle | Yefei Zhou Zhihao Chen Tao Zhang Silong Zhang Xiaolei Xing Qingxiang Yang Dongyang Li Metastable hybridized structure transformation in amorphous carbon films during friction—A study combining experiments and MD simulation Friction amorphous carbon film metastable transformation structural order molecular dynamics (MD) simulation tribological performance |
| title | Metastable hybridized structure transformation in amorphous carbon films during friction—A study combining experiments and MD simulation |
| title_full | Metastable hybridized structure transformation in amorphous carbon films during friction—A study combining experiments and MD simulation |
| title_fullStr | Metastable hybridized structure transformation in amorphous carbon films during friction—A study combining experiments and MD simulation |
| title_full_unstemmed | Metastable hybridized structure transformation in amorphous carbon films during friction—A study combining experiments and MD simulation |
| title_short | Metastable hybridized structure transformation in amorphous carbon films during friction—A study combining experiments and MD simulation |
| title_sort | metastable hybridized structure transformation in amorphous carbon films during friction a study combining experiments and md simulation |
| topic | amorphous carbon film metastable transformation structural order molecular dynamics (MD) simulation tribological performance |
| url | https://doi.org/10.1007/s40544-022-0690-x |
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