Synergistic Effect of Cr-Doped DLC Coatings and Lubricant Additives

Abstract:

The combination of diamond-like carbon (DLC) coatings and fluid lubrication is an efficacious method to improve the performance and service life of the friction-pairs working under the severe conditions, but the synergistic effect of DLC coatings and lubricant additives have not been clearly unveiled. The synergistic effect of Cr-doped DLC coatings with different Cr content and the lubricant additives of ZDDP, MoDTC, and T307 on the wear of DLC-coated stainless steel sample was studied, and it was found that the wear resistance of DLC-coated stainless steel sample can be further improve by the combination of DLC coatings and fluid lubrication; doping DLC coatings with Cr at an optimum level is beneficial for the wear resistance of DLC-coated stainless steel sample lubricated by PAO, PAO+ZDDP or PAO + MoDTC, but DLC coatings with a moderate Cr content is harmful to the wear resistance of DLC-coated stainless steel sample lubricated by PAO+T307. The synergistic effect of T307 and undoped DLC coatings or Cr-doped DLC coatings with a Cr content of 23.3 % is the best, while the three studied lubricant additives are harmful for the wear resistance of DLC coatings with a Cr content of 2.4 %.

• Periodical: Key Engineering Materials (Volume 492)
• Pages: 155-159
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.492.155
• Online since: September 2011
• Authors: Jian Sun, Wei Zhang, Zhi Qiang Fu, Cheng Biao Wang, Wen Yue, Zhi Jian Peng, Xiang Yu, Song Sheng Lin, Ming Jiang Dai
• Keywords: Cr-Doped DLC Coating, Lubricant Additive, Synergistic Effect, Wear Resistance

References

[1] J. Robertson: Mater. Sci. Eng. Vol. R37 (2002), p.129.

[2] K. Topolovec-Miklozic, F. Lockwood, H. Spikes: Wear Vol. 265 (2008), p.1893.

DOI: 10.1016/j.wear.2008.04.051

[3] M. Rubio-Roy, C. Corbella, E. Bertran, et al.: Diam. Relat. Mater. Vol. 18 (2009), p.923.

[4] B. Podgornik, D. Hren, J. Vizintin, et al.: Wear Vol. 261 (2006), p.22.

[5] M. Kalin, J. Vizintin: Wear Vol. 261 (2006), p.32.

[6] W. X. Huang: Application Guide of lubricant additives (China Petrochemical Press, China 2007).

[7] A.A. Voevodin, M.A. Capano, S.J.P. Laube, et al.: Thin Solid Films Vol. 298 (1997), p.107.

[8] X. Yu, C. B. Wang, H. Meng, et al: J. Nanosci. Nanotechnol. Vol. 10 (2010), p.5379.