Friction and wear behavior of the polyurethane composites reinforced with potassium titanate whiskers under dry sliding and water lubrication |
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Authors: | Gai Zhao Tingmei Wang and Qihua Wang |
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Affiliation: | (1) State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People’s Republic of China;(2) Graduate University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China; |
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Abstract: | A series of polyurethane (PU)/potassium titanate whiskers (PTW) composites modified by a high molecular weight hydroxyl-terminated
polydimethylsiloxane (HTPDMS) were prepared. The PTW is modified by 2,4-diisocyanatotoluene (2,4-TDI). The effect of the PTW
content on the mechanical and tribological properties of the PU composites was studied. Tensile strength of the PU composites
increased with the addition of PTW. The friction and wear experiments were tested on a MRH-3 model ring-on-block test rig
at different sliding speeds and loads under dry sliding and water lubrication. Experimental results revealed that the small
content of PTW contributed to largely improve the tribological properties of the PU composites. The coefficient of friction
(COF) of the composites increased and the wear rate value decreased with increasing PTW. Scanning electron microscopic (SEM)
investigations showed that the worn surfaces of the PTW-reinforced PU composites was smoother than pure polyurethane under
given load and sliding speed. |
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Keywords: | |
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