Effects of the interface structure on the mechanical and tribological properties of the MoS2/CuCr composites
High-strength wear-resistant materials have gained significant attention in current research. molybdenum disulfide (MoS2), as a solid self-lubricating material for reinforcing copper(Cu)-based composites, has become a focal point for researchers. However, the reaction between MoS2 and Cu during high...
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2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029909 |
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| author | Chao Guo Hongqu Jiang Yuan Luo Haijun Wu Qi Zhao Xingxia Yang Caiju Li Jianhong Yi Yichun Liu |
| author_facet | Chao Guo Hongqu Jiang Yuan Luo Haijun Wu Qi Zhao Xingxia Yang Caiju Li Jianhong Yi Yichun Liu |
| author_sort | Chao Guo |
| collection | DOAJ |
| description | High-strength wear-resistant materials have gained significant attention in current research. molybdenum disulfide (MoS2), as a solid self-lubricating material for reinforcing copper(Cu)-based composites, has become a focal point for researchers. However, the reaction between MoS2 and Cu during high temperature sintering leads to the formation of brittle phase, which compromises the interfacial bond. Therefore, this study attempts to improve the interfacial structure by introducing chromium (Cr) element through CuCr alloying with the expectation of mechanical and tribological properties improvement. Spark plasma sintering (SPS) is employed to prepare MoS2/CuCr composites and the effects of different MoS2 contents (0–10 wt%) under various normal loads on frictional wear will be evaluated. The results demonstrate that Cr element addition facilitates the formation of compact Cr3S4 compounds with MoS2 at the interfaces, enhancing interfacial bonding with Cu and providing a solid foundation for maintaining excellent wear resistance during friction processes. With increasing content of MoS2, both coefficient of friction (COF) and wear rate initially decrease and then show an upward trend. Under the normal load of 20 N, compared with the CuCr composite, the friction coefficient of the composite with 7.5 wt % MoS2 content is 0.281, which is significantly reduced by 37.7 %, and the wear rate is 0.1471( × 10−3 mm3/N.m), which is reduced by 50.9 %. This research content can provide a better theoretical basis for changing the problem of poor wettability between the lubricating phase and the matrix. |
| format | Article |
| id | doaj-art-9a896ac13c0f4206a713a6067fcdc73c |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-9a896ac13c0f4206a713a6067fcdc73c2025-01-19T06:25:46ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013420242035Effects of the interface structure on the mechanical and tribological properties of the MoS2/CuCr compositesChao Guo0Hongqu Jiang1Yuan Luo2Haijun Wu3Qi Zhao4Xingxia Yang5Caiju Li6Jianhong Yi7Yichun Liu8School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaSchool of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaSchool of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaKunming Institute of Precious Metals, Kunming, 650106, ChinaKunming Institute of Precious Metals, Kunming, 650106, China; Corresponding author.State-Local Joint Engineering Research Center of Precious Metal Catalytic Technology and Application, Kunming Sino-platinum Metals Catalysts Co. Ltd., Kunming 650106, China; Corresponding author.School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaSchool of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaSchool of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author.Liuyichun@kust.edu.cnHigh-strength wear-resistant materials have gained significant attention in current research. molybdenum disulfide (MoS2), as a solid self-lubricating material for reinforcing copper(Cu)-based composites, has become a focal point for researchers. However, the reaction between MoS2 and Cu during high temperature sintering leads to the formation of brittle phase, which compromises the interfacial bond. Therefore, this study attempts to improve the interfacial structure by introducing chromium (Cr) element through CuCr alloying with the expectation of mechanical and tribological properties improvement. Spark plasma sintering (SPS) is employed to prepare MoS2/CuCr composites and the effects of different MoS2 contents (0–10 wt%) under various normal loads on frictional wear will be evaluated. The results demonstrate that Cr element addition facilitates the formation of compact Cr3S4 compounds with MoS2 at the interfaces, enhancing interfacial bonding with Cu and providing a solid foundation for maintaining excellent wear resistance during friction processes. With increasing content of MoS2, both coefficient of friction (COF) and wear rate initially decrease and then show an upward trend. Under the normal load of 20 N, compared with the CuCr composite, the friction coefficient of the composite with 7.5 wt % MoS2 content is 0.281, which is significantly reduced by 37.7 %, and the wear rate is 0.1471( × 10−3 mm3/N.m), which is reduced by 50.9 %. This research content can provide a better theoretical basis for changing the problem of poor wettability between the lubricating phase and the matrix.http://www.sciencedirect.com/science/article/pii/S2238785424029909Copper matrix compositesMoS2Interface structureWear-resistant property |
| spellingShingle | Chao Guo Hongqu Jiang Yuan Luo Haijun Wu Qi Zhao Xingxia Yang Caiju Li Jianhong Yi Yichun Liu Effects of the interface structure on the mechanical and tribological properties of the MoS2/CuCr composites Journal of Materials Research and Technology Copper matrix composites MoS2 Interface structure Wear-resistant property |
| title | Effects of the interface structure on the mechanical and tribological properties of the MoS2/CuCr composites |
| title_full | Effects of the interface structure on the mechanical and tribological properties of the MoS2/CuCr composites |
| title_fullStr | Effects of the interface structure on the mechanical and tribological properties of the MoS2/CuCr composites |
| title_full_unstemmed | Effects of the interface structure on the mechanical and tribological properties of the MoS2/CuCr composites |
| title_short | Effects of the interface structure on the mechanical and tribological properties of the MoS2/CuCr composites |
| title_sort | effects of the interface structure on the mechanical and tribological properties of the mos2 cucr composites |
| topic | Copper matrix composites MoS2 Interface structure Wear-resistant property |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029909 |
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