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Tribological Behavior of Self-mated Ti3SiC2 in Short-Chain n-Alcohols, Glycol and Glycerol under Boundary Lubrication

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Abstract

The tribological behavior of self-mated Ti3SiC2 in bath of alcohols are investigated at sliding velocity ranging from 0.005 to 0.3 m/s. The results show that the friction coefficient and wear rates of self-mated Ti3SiC2 are reduced greatly under lubrication of alcohols compared to that under dry condition. In alcohols, smooth worn surfaces of Ti3SiC2 can be obtained. The mechanical wear is inhibited and the oxidized Ti and Si species on the worn surface are TiO2 and silica gel. The friction coefficients decrease with carbon numbers and sliding velocity in the n-alcohols. The friction coefficient decrease with sliding velocity in glycol and glycerol as well. The decrease is determined by the increase of the viscosity of alcohols. In glycerol, at 0.1 m/s and 5 N, the friction coefficient of self-mated Ti3SiC2 is 0.08 which is the lowest in this paper. The lubrication regimes are calculated according to classical lubrication theory. At velocity from 0.005 to 0.3 m/s, in all of the alcohols except glycerol, the λ are below 1 which indicates that the lubrication regime is BL. While in glycerol, the lubrication regimes vary from BL to BL and EHL, then to EHL as the velocity increases.

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Acknowledgments

The author acknowledges the financial support from the National Natural Science Foundation of China (51075382 and 51375473) and the “Hundred Talents Program” (Junhu Meng) of Chinese Academy of Sciences.

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Authors and Affiliations

  1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People’s Republic of China

    Wanxiu Hai, Junling Zeng, Shufang Ren, Junhu Meng & Jinjun Lu

  2. University of Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China

    Wanxiu Hai & Junling Zeng

  3. College of Chemistry and Materials Science, Northwest University, Xi’an, 710069, People’s Republic of China

    Jinjun Lu

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  1. Wanxiu Hai
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  2. Junling Zeng
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Correspondence to Junhu Meng.

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Hai, W., Zeng, J., Ren, S. et al. Tribological Behavior of Self-mated Ti3SiC2 in Short-Chain n-Alcohols, Glycol and Glycerol under Boundary Lubrication. Tribol Lett 55, 421–428 (2014). https://doi.org/10.1007/s11249-014-0374-4

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