Abstract
The mechanism of hard surfaces worn by soft polymers is not clearly understood. In this paper, a new hypothesis has been proposed, it holds that the stress acting on the hard surface under certain working conditions is the main reason for wear of the hard surface by a soft polymer. The hypothesis was investigated by changing the contact form between tribo-pairs. For this, friction tests between six polymer spheres and smooth, rough, and inclined monocrystalline silicon surfaces were carried out. The results show that for the same tribo-pair, the silicon surface will not be worn in some contact forms, but in other contact forms it will be worn. We believe the wear of hard surface by a soft polymer is the result of the combined stress state action on the hard surface.
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The work is supported by the National Key R&D Program of China (Grant No. 2018YFB2001001) and the National Natural Science Foundation of China (Grant Nos. 51575300 and 51735006).
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Zhaoxiang ZHANG. He received the B.S. degree in process equipment and control engineering from China University of Mining and Technology, Xuzhou, China, in 2015; and the M.S. degree from Zhejiang University of Technology, Hangzhou, China, in 2018. He is currently a Ph.D. candidate in mechanical engineering at Tsinghua University, Beijing, China. His major research areas include polymer tribology and rubber seal forming process.
Fei GUO. He received his Ph.D. degree from Tsinghua University, Beijing, China, in 2014. He is currently an assistant professor at Department of Mechanical Engineering, Tsinghua University. His major research focuses on rubber & plastic seal and static seal technology.
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Zhang, Z., Jia, X., Guo, F. et al. Effect of contact forms on the wear of hard silicon surfaces by soft polymers. Friction 9, 918–928 (2021). https://doi.org/10.1007/s40544-020-0375-2
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DOI: https://doi.org/10.1007/s40544-020-0375-2