Improved wear resistance in alumina-PTFE nanocomposites with irregular shaped nanoparticles |
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| Affiliation: | 1. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, PR China;2. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China;3. Computational Science Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea;4. Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, PR China;5. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China |
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| Abstract: | Past studies with PTFE nanocomposites showed up to 600× improvements in wear resistance over unfilled PTFE with the addition of Al2O3 nanoparticles. Irregular shaped nanoparticles are used in this study to increase the mechanical entanglement of PTFE fibrils with the filler. The tribological properties of 1, 2, 5 and 10 wt.% filled samples are evaluated under a normal pressure and sliding speed of 6.3 MPa and 50.8 mm/s, respectively. The wear resistance was found to improve 3000× over unfilled PTFE with the addition of 1 wt.% nanoparticles. The 5 wt.% sample had the lowest steady state wear rate of K = 1.3 × 10?7 mm3/N m and the lowest steady friction coefficient with μ = 0.21. |
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