Reinforcing effect of graphene on the mechanical properties of Al<sub>2</sub>O<sub>3</sub>/TiC ceramics

Zuo-li Li; Jun Zhao; Jia-lin Sun; Feng Gong; Xiu-ying Ni

doi:10.1007/s12613-017-1533-z

Volume 24 Issue 12

Dec. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(12): 1403-1411

Zuo-li Li, Jun Zhao, Jia-lin Sun, Feng Gong, and Xiu-ying Ni, Reinforcing effect of graphene on the mechanical properties of Al₂O₃/TiC ceramics, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1403-1411. https://doi.org/10.1007/s12613-017-1533-z

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Zuo-li Li, Jun Zhao, Jia-lin Sun, Feng Gong, and Xiu-ying Ni, Reinforcing effect of graphene on the mechanical properties of Al2O3/TiC ceramics, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1403-1411. https://doi.org/10.1007/s12613-017-1533-z

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Research Article

Reinforcing effect of graphene on the mechanical properties of Al₂O₃/TiC ceramics

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Corresponding author:
Jun Zhao E-mail: zhaojun@sdu.edu.cn
Received: 10 April 2017; Revised: 14 July 2017; Accepted: 9 August 2017

Abstract

Abstract

Multilayer graphene (MLG)-reinforced Al₂O₃/TiC ceramics were fabricated through hot pressing sintering, and the reinforcing effect of MLG on the microstructure and mechanical properties of the composites was investigated by experiment and simulation. The simulation of dynamic crack initiation and propagation was investigated based on the cohesive zone method. The results show that the composite added with 0.2wt% MLG has excellent flexural strength and high fracture toughness. The major reinforcing mechanisms are the synergistic effect by strong and weak bonding interfaces, MLG pull-out, and grain refinement resulting from the addition of MLG. In addition, the aggravating of crack deflection, branching, blunting, and bridging have indispensable contribution to the improvement of the as-designed materials.
- mechanical properties;
- ceramics;
- graphene;
- simulation;
- interface

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