POLYMERS AND POLYMER MATRIX COMPOSITES |
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Study on Tribological Properties Evolution of PTFE Composites Filled with PEEK and Nano-Al2O3 Based on Block-on-ring Friction Model |
QI Yuan1, GONG Jun1, YANG Dongya1, WANG Honggang2, GAO Gui2, REN Junfang2, CHEN Shengsheng2
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1 School of Mechanical & Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050 2 State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000 |
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Abstract The present work aimed at exploring the tribological properties evolution of PEEK- and nano-Al2O3-filled PTFE composites during the friction process. PTFE was referenced with different volume fraction PEEK and Al2O3 nanoparticles, then cold pressed and sintered by welding furnace according to the temperature control program. The tribological performance of composites was measured by MRH-3 tribological behavior tes-ter, which provided experimental data at different friction stages, and the instantaneous wear rate was calculated throughout the entire friction process. The morphology of the wear surface of samples and the transfer film on the counterpart ring was observed with scanning electronic microscopy (SEM). Analysis of contact stress of composites in friction process was carried out by using simulation software ABAQUS. The results showed that the PEEK and nano-Al2O3 particles significantly improve the wear resistance of PTFE. PTFE composite filled with 10%PEEK particles displays the best wear resistance performance (wear rate 3.69×10-6 mm3/(N·m)) and the lowest friction coefficient (0.19), and the addition of 5% nano-Al2O3 contributes to higher hardness and thermal diffusivity. The instantaneous wear rate appeared to increase first sharply and then decrease during the friction process, and finally maintained a steady change trend. The contact pressure of the sample was determined to decrease rapidly with the increase of the loss mass in the initial stage of friction, and gradually level off at the later stage.
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Published: 16 May 2019
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Fund:This work was financially supported by the National Natural Science Foundation of China (51165022) and the Natural Science Foundation of Gansu Province (1606RJZA166). |
About author:: Yuan Qi is a doctoral candidate in mechanical manufacturing and automation at Lanzhou University of Technology. He has published 7 journal papers as the first author. His research interests focus on the tribology of the polymer composite. Jun Gong obtained his M.E. degree from the Lanzhou University of Technology and served in School of Mechanical and Electronical Engineering, and till now. He is currently a professor and doctoral supervisor. He has published more than 60 journal papers. His team's research interests are CNC honing machine, spray robot trajectory optimization and stirling engine sealing technology research, and so on. |
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