Tribological properties of epoxy nanocomposites: Part II. A combinative effect of short carbon fibre with nano-TiO2 |
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| Affiliation: | 1. Flupol, Surface Engineering, S.A. Rua da Central, 401, Campo, 4440-043 Valongo, Portugal;2. LEPABE – Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;3. CETRIB, Tribology, Vibration and Industrial Maintenance Unit, INEGI, Institute of Mechanical Engineering and Industrial Management, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;1. Department of Engineering “Enzo Ferrari”, Università di Modena e Reggio Emilia, Via Pietro Vivarelli 10/1, 41125, Modena, MO, Italy;2. ATP S.p.A., Via Austria 12/14/16, 41122, Modena, MO, Italy;3. InterMech – MO.RE. Centro Interdipartimentale per la Ricerca Applicata e i Servizi nel Settore della Meccanica Avanzata e della Motoristica, Università di Modena e Reggio Emilia, Via Pietro Vivarelli 2, 41125, Modena, MO, Italy;4. Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Local Unit: Università di Modena e Reggio Emilia, Via Pietro Vivarelli 10/1, 41125, Modena, MO, Italy;5. Il Sentiero International Campus S.p.A.,Via Friuli 11, 36015, Schio, VI, Italy;1. College of Mechanical Engineering, Donghua University, Shanghai, 201620, China;2. Engineering Research Center of Advanced Textile Machinery, Ministry of Education, Shanghai, 201620, 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. 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. Institute for Composite Materials (IVW), University of Kaiserslautern, 67663 Kaiserslautern, Germany;4. Federal Institute for Materials Research and Testing (BAM), 12205 Berlin, Germany |
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| Abstract: | In our pervious studies Z. Zhang, C. Breidt, L. Chang, F. Haupert, K. Friedrich, Enhancement of the wear resistance of epoxy: short carbon fibre, graphite, PTFE and nano-TiO2, Composites A 35 (2004) 1385–1392; L. Chang, Z. Zhang, C. Breidt, K. Friedrich, Tribological properties of epoxy nanocomposites. I. Enhancement of the wear resistance by nano-TiO2 particles, Wear 258 (1–4) (2005) 141–148], wear performances of a series of epoxy-based nanocomposites were systemically investigated by a pin-on-disk apparatus under different sliding conditions. The addition of spherical TiO2 nanoparticles (300 nm in diameter) was found to be able to apparently reduce the frictional coefficient, and consequently to decrease the contact temperature and wear rate of fibre reinforced epoxy composites. To promote this conclusion, the present paper intends to further understand the wear mechanisms involved in micro- and nanoscales. Based on a scanning electron (SEM) and an atomic force (AFM) microscopy observations of the worn surfaces, a positive rolling effect of the nanoparticles between the material pairs was proposed, which led to the remarkable reduction of the frictional coefficient. In particular, this rolling effect protects the short carbon fibres from more severe wear mechanisms, especially at high sliding pressure and speed situations. In order to validate the assumption proposed, the influence of the counterpart roughness on the wear performance were carried out as well. |
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