Mechanical and tribological properties of TiB2-SiC and TiB2-SiC-GNPs ceramic composites |
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| Affiliation: | 1. Institute of Materials Research, Slovak Academy of Sciences, Košice, Slovak Republic;2. Institute of Inorganic Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic;3. Institute of Physics of Materials, Czech Academy of Sciences, Brno, Czech Republic;4. Donát Bánki Faculty of Mechanical and Safety Engineering, Óbuda University, Budapest, Hungary;1. Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials of Ministry of Education, Shandong University, Jinan 250061, PR China;2. Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Jinan 250061, PR China;3. Laiwu Advanced Ceramic Technology Co., Ltd., PR China;4. School of Materials, University of Manchester, Manchester M13 9PL, UK;5. Shandong Baona New Materials Co., Ltd., PR China;1. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an, 710049, PR China;2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mechanical Engineering, Shandong University, Jinan, 250061, PR China;3. Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi׳an Jiaotong University, Xi’an, 710049, PR China;1. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China;2. Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology (Ministry of Industry and Information Technology), Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | TiB2-SiC and TiB2-SiC-graphene nanoplatelets (GNPs) composites were prepared using field-assisted sintering technology at 2100 °C in argon atmosphere, and the influence of the SiC and different GNPs addition on microstructure development, mechanical and tribological properties has been investigated. Instrumented hardness, bending strength, chevron-notched fracture toughness and ball-on-flat tribological tests were used for the testing and characterization of the composites. The addition of SiC significantly improved the bending strength and elastic modulus with values of 601 MPa and 474 GPa, respectively, but decreased the fracture toughness with a value of 4.8 MPa.m1/2. The addition of GNPs has a positive effect on fracture toughness and flexural strength but a negative one on the hardness. The increasing amount of both GNPs has a positive influence on wear characteristics of the composites thanks to the described wear mechanisms. |
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| Keywords: | GNPs Mechanical properties Tribological properties |
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