Elevated-temperature tribological behavior of Ti–B–C–N coatings deposited by reactive magnetron sputtering

Xiang-Yang Chen¹，Shao-Fu Huang¹，Sheng-Li Ma²，Run Huang³，Jin Zhang¹，Hai-Xia Hu¹

1. School of Mechanical Engineering, Anhui University of Science and Technology2. State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University3. School of Materials Science and Engineering, Anhui University of Science and Technology

摘 要：Quaternary Ti-B-C-N coatings with various carbon contents were deposited on high-speed steel（HSS）substrates by reactive magnetron sputtering（RMS） system.The elevated-temperature tribological behavior of Ti-BC-N coatings was explored using pin-on-disk tribometer,scanning electron microscopy（SEM）,and energy-dispersive X-ray spectroscopy（EDX）.The present results show that the steady-state friction coefficient value and the instantaneous friction coefficient fluctuation range of TiB-C-N coatings decrease as carbon content increases at100 and 300 ℃,while the steady-state friction coefficient value of all Ti-B-C-N coatings becomes higher than 0.4 at500 ℃.As ambient temperature increases,the running-in periods of all Ti-B-C-N coatings become shorter.Wear damage to Ti-B-C-N coatings during sliding at elevated temperature is mainly caused by adhesive wear,and adhesive-wear damage to Ti-B-C-N coatings increases as ambient temperature increases;however,higher carbon content is beneficial for decreasing the adhesive-wear damage to Ti-B-C-N coatings during sliding at elevated temperature.

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