Abstract
TiB2 was chosen to further improve the tribological properties of TiAl matrix self-lubricating composites containing Ag. The possible synergetic action of a combination of TiB2 and Ag was investigated using a pin-on-disk high temperature tribometer from room temperature to 600 °C. The tribological test results indicated that the addition of TiB2 obviously enhanced the wear resistance of the composites over a wide temperature range. Moreover, the composites containing TiB2 had a low friction coefficient at 600 °C. The subsurface analysis of cross sections of worn surfaces showed that TiB2 played the role in wear-resistant skeleton and restricted the plastic flow of Ag during dry friction process. The investigation showed that TiB2 and Ag could exhibit good synergistic effect on improving the tribological properties of composites.
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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 (2014-yb-004); the Project for Science and Technology Plan of Wuhan City (2013010501010139); 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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Yao, J., Shi, X., Zhai, W. et al. Effect of TiB2 on Tribological Properties of TiAl Self-lubricating Composites Containing Ag at Elevated Temperature. J. of Materi Eng and Perform 24, 307–318 (2015). https://doi.org/10.1007/s11665-014-1275-2
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DOI: https://doi.org/10.1007/s11665-014-1275-2