Abstract
More durable, low-friction self-lubricating materials in modern industry are greatly needed for tribological systems. The current paper presents the tribological performance of TiAl matrix self-lubricating composites (TSC) containing MoS2, hexagonal BN and Ti3SiC2 designated as MhT against GCr15 steel counterface under several sliding speeds from 0.2 to 0.8 m s−1 and applied loads from 6 to 12 N. The results suggested that MhT played an important role in decreasing friction coefficients and wear rates. The covering percentage of transfer layers on worn surfaces varied with the changing of sliding speeds and applied loads, hence resulting in the distinct friction and wear characteristics of TSC. TSC containing 10 wt% MhT exhibited the best excellent tribological performance at 10 N–0.8 m s−1, which could be due to the formation of the best compaction and largest coverage of transfer layer on the worn surfaces.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (51275370); the Nature Science Foundation of Hubei Province (2012FFB05104); the Fundamental Research Funds for the Central Universities (2013-ZY-049); the Project for Science and Technology Plan of Wuhan City (2013010501010139); the Program for New Century Excellent Talents in University; the Academic Leader Program of Wuhan City (201150530146); and the Project for Teaching and Research project of Wuhan University of Technology (2012016). The authors also wish to gratefully thank the Material Research and Testing Center of Wuhan University of Technology for their assistance.
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Xu, Z., Shi, X., Zhang, Q. et al. Effect of Sliding Speed and Applied Load on Dry Sliding Tribological Performance of TiAl Matrix Self-lubricating Composites. Tribol Lett 55, 393–404 (2014). https://doi.org/10.1007/s11249-014-0367-3
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DOI: https://doi.org/10.1007/s11249-014-0367-3