Sliding wear performance of nano-SiO2/short carbon fiber/epoxy hybrid composites |
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| Authors: | Qing Bing Guo Min Zhi Rong Guo Liang Jia Kin Tak Lau Ming Qiu Zhang |
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| Affiliation: | 1. Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, OFCM Institute, School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 510275, PR China;2. Materials Science Institute, Zhongshan University, Guangzhou 510275, PR China;3. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, PR China;1. School of Materials Science and Engineering, Institute for Advanced Materials, Jiangsu University, Zhenjiang 212013, China;2. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China;3. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;1. Department of Mechanical Engineering, Adichunchanagiri Institute of Technology, Chikkamagalur 577 102, India;2. Department of Mechanical Engineering, The National Institute of Engineering, Mysore 570 008, India;1. Selçuk University, Department of Materials Science and Engineering, Konya, Turkey;2. Selçuk University, Department of Mechanical Engineering, Konya, Turkey;3. Necmettin Erbakan University, Department of Aircraft Engineering, Konya, Turkey;1. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education (Harbin Institute of Technology), Harbin, 150090, China;2. School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China;3. Department of Mechanical Engineering, University of Houston, Houston, 77204, USA;1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;2. Materials and Textile Engineering College, Jiaxing University, Jiaxing 314001, Zhejiang Province, China;3. Institute for Composite Materials (IVW GmbH), Technical University of Kaiserslautern, 67663 Kaiserslautern, Germany |
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| Abstract: | In the present work, epoxy based composites filled with hybrid nano-SiO2 particles and short pitch based carbon fiber were prepared. Copolymer of styrene and maleic anhydride was grafted onto the nanoparticles prior to the compounding so that the nanoparticles can be covalently connected to the composites’ matrix through the reaction between anhydride and epoxide groups during curing. Consequently, the nano-SiO2/matrix interfacial interaction was enhanced. By evaluating sliding wear properties of the composites as a function of the components concentrations, positive synergetic effect was found. That is, both wear rate and friction coefficient of the hybrid composites were significantly lower than those of the composites containing individual nano-SiO2 or short carbon fiber. The composite with 4 wt.% nano-SiO2 and 6 wt.% carbon fiber offered the greatest improvement of the tribological performance. Compared to the results of hybrid composites reported so far, the above composite is characterized by relatively lower filler content, which would facilitate processing in practice. Increased surface hardness, lubricating effect of the sheet-like wear debris reinforced by nano-SiO2 and rapidly formed transfer film were believed to be the key issues accounting for the remarkable wear resisting and friction reducing behaviors. |
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