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Comparison and Analysis of the Influence of Test Conditions on the Tribological Properties of Emulsified Bio-Oil

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Abstract

The service life of a diesel fuel injector is highly affected by the tribological properties of the fuel. This study aims to investigate the friction and wear behaviors of emulsified bio-oil (EBO), which is a very promising alternative fuel for engines. Sliding wear tests were performed with a ball-on-disk tribometer using a GCr15 steel ball and a flat specimen as a counterpart. In these tests, the total sliding distance was 500 m, the load ranged from 10 to 20 N, and the oscillation frequency ranged from 30 to 50 Hz. Experimental results showed that EBO had better tribological properties than diesel oil and crude bio-oil. Contact load and oscillation frequency significantly influenced friction coefficient, wear volume, and wear damage pattern. The friction coefficient decreased with an increase in load and increased with an increase in oscillation frequency. Furthermore, the wear volume slightly increased with an increase in load or oscillation frequency. The damage mechanism is attributed to adhesive wear under low load and to abrasive wear under high load. The transition in the wear mechanism is related to the adsorption of the molecules in the EBO, the microstructural contact surface, and the mechanical actions.

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Acknowledgments

The authors express their gratitude to Professor Liping Wang, Kunhong Hu, Xiaojun Sun, and Dr. Guangan Zhang for their assistance on the tribo-tests and discussion. The authors gratefully acknowledge the financial support given by the National Natural Science Foundation of China (51275143), the Anhui Provincial Natural Science Foundation (1408085ME82), and the College Students Innovation Experimental Plan Fund of HFUT.

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Authors and Affiliations

  1. Institute of Tribology, Hefei University of Technology, Hefei, 230009, China

    Yufu Xu, Yanguo Yin, Jie Huang & Xianguo Hu

  2. School of Arts and Media, Hefei Normal University, Hefei, 230601, China

    Xiaojing Zheng

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  1. Yufu Xu
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  2. Xiaojing Zheng
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Correspondence to Yufu Xu.

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Xu, Y., Zheng, X., Yin, Y. et al. Comparison and Analysis of the Influence of Test Conditions on the Tribological Properties of Emulsified Bio-Oil. Tribol Lett 55, 543–552 (2014). https://doi.org/10.1007/s11249-014-0384-2

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  • DOI: https://doi.org/10.1007/s11249-014-0384-2

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