The roles of nano-SiO2 particles on the tribological behavior of short carbon fiber reinforced PEEK |
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| Authors: | G Zhang L Chang AK Schlarb |
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| Affiliation: | 1. Department of Continuum Mechanics and Structural Analysis, University Carlos III of Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain;2. Department of Mechanical Engineering, University Carlos III of Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain;3. Laboratory of Mechanics, Biomechanics, Polymers and Structures, National Engineering School of Metz, 1 route d’Ars Laquenexy, CS 65820 57078 METZ Cedex 3, France;1. Instituto de Investigación en Ingeniería de Aragón, I3A, Universidad de Zaragoza, 50018, Zaragoza, Spain;2. Instituto de Ciencia de Materiales de Aragón, ICMA, CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain;3. Instituto de Carboquímica, ICB-CSIC, Miguel Luesma Castán 4, 50018, Zaragoza, Spain;1. Ghent University, Laboratory Soete, Technologiepark, 9052 Zwijnaarde, Belgium;2. Lehrstuhl für Verbundwerkstoffe,University of Kaiserslautern, Kaiserslautern, Germany;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Qingdao Center of Resource Chemistry & New Materials, Qingdao 266071, China;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. Laboratory for Tribology and Interface Nanotechnology, Faculty of Mechanical Engineering, University of Ljubljana, Bogi?i?eva, 1000 Ljubljana, Slovenia;2. Department for Nanostructured Materials, Jo?ef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia |
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| Abstract: | In the present work, the roles of low-loading (1 vol.%) nano-SiO2 particles (13 nm) on the tribological behavior of short carbon fiber (SCF)/PTFE/graphite (micro-sized) filled PEEK were investigated. Tribological tests were carried out at room temperature in extremely wide pressure and sliding velocity ranges, i.e. from 1 MPa to 7 MPa and from 1 m/s to 2 m/s, respectively. Under all conditions studied, the nanopartilces remarkably reduce the friction coefficients. With respect to the wear rates, however, the roles of the nanoparticles show a strong dependence on the sliding conditions. Under 1 MPa, the abrasiveness exerted by possible nano-SiO2 agglomerates seems to accelerate SCF destructions. Under pressures higher than 2 MPa, however, the nanoparticles remarkably reduce the wear rate. This effect is more pronounced under high pressures and especially at high sliding velocities. The protection of SCF/matrix interface by the nanoparticles is supposed to be the main reason for the enhancement of the wear resistance. |
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