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Open AccessArticle

Reinforcing Mechanisms of Graphene and Nano-TiC in Al2O3-Based Ceramic-Tool Materials

by 1,2, 1,2,*, 1,2, 1,2 and 1,2
1
Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mechanical Engineering, Shandong University, Jinan 250061, China
2
National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(9), 1815; https://doi.org/10.3390/nano10091815
Received: 12 August 2020 / Revised: 31 August 2020 / Accepted: 9 September 2020 / Published: 11 September 2020
Graphene and nano-TiC, which have good reinforcing effects on Al2O3-based ceramic-tool materials, are generally used as additive phases for ceramics. In this study, nine kinds of samples were sintered, to investigate the effects of graphene and nano-TiC on the reinforcing mechanisms of Al2O3-based ceramics. The experimental results indicated that adding 0.5 vol% graphene and 10 vol% nano-TiC can obtain the optimum flexural strength, fracture toughness, and Vickers hardness, which were 705 ± 44 MPa, 7.4 ± 0.4 MPa m1/2, and 20.5 ± 0.8 GPa, respectively. Furthermore, the reinforcing mechanisms of crack bridging, pull-out of graphene, and pull-out of nano-TiC are identified, which are contributed to improving the mechanical properties of ceramics. Meanwhile, other reinforcing mechanisms induced by graphene (graphene break, crack guiding, and 3D propagation) and nano-TiC (crack branching, crack deflection, and peeling) are discussed. These reinforcing mechanisms are coupled together, while decoupling is hard to work out. Thus, further quantitative studies of reinforcing effects of graphene and nano-TiC on Al2O3-based ceramic-tool materials are necessary to be carried out. View Full-Text
Keywords: graphene/nano-TiC; ceramics; microstructure; mechanical properties; reinforcing mechanisms graphene/nano-TiC; ceramics; microstructure; mechanical properties; reinforcing mechanisms
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MDPI and ACS Style

Sun, Z.; Zhao, J.; Wang, X.; Cui, E.; Yu, H. Reinforcing Mechanisms of Graphene and Nano-TiC in Al2O3-Based Ceramic-Tool Materials. Nanomaterials 2020, 10, 1815. https://doi.org/10.3390/nano10091815

AMA Style

Sun Z, Zhao J, Wang X, Cui E, Yu H. Reinforcing Mechanisms of Graphene and Nano-TiC in Al2O3-Based Ceramic-Tool Materials. Nanomaterials. 2020; 10(9):1815. https://doi.org/10.3390/nano10091815

Chicago/Turabian Style

Sun, Zhefei; Zhao, Jun; Wang, Xuchao; Cui, Enzhao; Yu, Hao. 2020. "Reinforcing Mechanisms of Graphene and Nano-TiC in Al2O3-Based Ceramic-Tool Materials" Nanomaterials 10, no. 9: 1815. https://doi.org/10.3390/nano10091815

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