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Effect of Applied Load and Sliding Speed on Tribological Behavior of TiAl-Based Self-Lubricating Composites

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Abstract

This article was dedicated to explore the combined lubrication of silver, MoS2 and carbon nanotubes (CNTs) based on the changes in applied loads and sliding speeds. The results showed that the formed lubricating films played the major role in undertaking the equivalent stress, as well as effectively reduced friction resistance and material loss. It led to small friction coefficient and less wear rate at 1.2 m/s. At 1.2 m/s-16 N, an integrated lubricating film containing Ag, CNTs and MoS2 was continuously formed, which well provided the excellent lubricating property, resulting in lower friction coefficient (0.19) and less wear rate (1.56 × 10−5 mm3/N m). The formation of Ag and CNTs enriched islands acted as the bearing areas and played the major role in resisting friction resistance. Meanwhile, solid lubricant MoS2 was enriched in the lubricating film and effectively protected lubricating film from being destroyed, resulting in small friction coefficient and less wear rate at 1.2 m/s-16 N.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (51275370); Fundamental Research Funds for Central Universities (2017-YB-019); Authors also wish to gratefully thank the Material Research and Testing Center of Wuhan University of Technology for their assistance. Authors were grateful to M.J. Yang, X.L. Nie, S.L. Zhao, Y.M. Li and W.T. Zhu in Material Research and Test Center of WUT for their kind help with EPMA and FESEM.

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Liu, X., Shen, Q., Shi, X. et al. Effect of Applied Load and Sliding Speed on Tribological Behavior of TiAl-Based Self-Lubricating Composites. J. of Materi Eng and Perform 27, 194–201 (2018). https://doi.org/10.1007/s11665-017-3106-8

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  • DOI: https://doi.org/10.1007/s11665-017-3106-8

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