Friction and wear behavior of C-based composites in situ reinforced with W2B5 |
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| Affiliation: | 1. School of Materials Science and Engineering, Harbin Institute of Technology, P.O. Box 433, Harbin 150001, China;2. School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China;1. Center of Excellence for Advanced Materials and Processing, School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran 16845-118, Iran;2. Center of Excellence for Ceramic Materials in Energy and Environmental Applications, Iran University of Science and Technology, Tehran 16845-118, Iran;3. Institute for Materials Research, University of Leeds, Leeds LS2 9JT, United Kingdom;1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;2. Department of Physics, Renmin University of China, Beijing 100872, China;1. School of Material Science and Engineering, Shandong University of Technology, Zibo 255049, PR China;2. Analytical and Testing Center, Shandong University of Technology, Zibo 255049, PR China;1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;2. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | The C-W2B5 composites with W2B5 content of 30 vol.% and 40 vol.% were fabricated by reaction hot pressing sintering. The mechanical properties and friction and wear behavior of the composites were investigated. For comparison, the friction and wear behavior of graphite was also studied. It was found that the presence of W2B5 grain resulted in notable improvements in mechanical properties and wear resistance of the composites compared to graphite in spite of a little higher friction coefficient. A graphite-rich mechanically mixed layer (MML) was formed on the worn surface of the composites, which facilitated the low friction coefficient. Fracture and removal of the MML depending on the fracture toughness of the composites and Hertzian stress levels were considered to be the main wear mechanism. |
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