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Journal of Advanced Ceramics 2019, 8(4): 527-536 https://doi.org/10.1007/s40145-019-0334-4
Research Article | Open Access | Issue | Published: 04 December 2019

Fabrication and mechanical properties of self-toughening ZrB2-SiC composites from in-situ reaction

Show Author's Information Zhaofu ZHANG,  Jianjun SHA( ),  Yufei ZU,  Jixiang DAI,  Yingjun LIU
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China
Keywords:
mechanical property, ultrahigh temperature ceramic, in-situ reaction, interlocking microstructure
Cite this article:
ZHANG Z, SHA J, ZU Y, et al. Fabrication and mechanical properties of self-toughening ZrB2-SiC composites from in-situ reaction. Journal of Advanced Ceramics, 2019, 8(4): 527-536. https://doi.org/10.1007/s40145-019-0334-4
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Abstract Full text About this article

Self-toughening ZrB2-SiC based composites are fabricated by in-situ reactive hot pressing. The effect of sintering additive content on the microstructure and mechanical properties of the composites is investigated. Microstructure observation found that the in-situ reactive hot pressing could promote the anisotropic growth of ZrB2 grains and the formation of interlocking microstructure. Such microstructure could improve the mechanical properties, especially, for the fracture toughness. The improved mechanical properties could be attributed to the self-toughening structure related to the ZrB2 platelets and the formed interlocking microstructure, which could trigger various toughening mechanisms such as grain pull-out, crack bridging, crack deflection, and crack branching, providing the main contribution to the high fracture toughness.


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About this article

Fabrication and mechanical properties of self-toughening ZrB2-SiC composites from in-situ reaction

Show Author's information Zhaofu ZHANG, Jianjun SHA( ), Yufei ZU, Jixiang DAI, Yingjun LIU
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China

Abstract

Self-toughening ZrB2-SiC based composites are fabricated by in-situ reactive hot pressing. The effect of sintering additive content on the microstructure and mechanical properties of the composites is investigated. Microstructure observation found that the in-situ reactive hot pressing could promote the anisotropic growth of ZrB2 grains and the formation of interlocking microstructure. Such microstructure could improve the mechanical properties, especially, for the fracture toughness. The improved mechanical properties could be attributed to the self-toughening structure related to the ZrB2 platelets and the formed interlocking microstructure, which could trigger various toughening mechanisms such as grain pull-out, crack bridging, crack deflection, and crack branching, providing the main contribution to the high fracture toughness.

Keywords: mechanical property, ultrahigh temperature ceramic, in-situ reaction, interlocking microstructure

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Publication history
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Publication history

Received: 26 October 2018
Revised: 15 April 2019
Accepted: 22 April 2019
Published: 04 December 2019
Issue date: December 2019

Copyright

© The author(s) 2019

Acknowledgements

This work was supported by research fund for the China Postdoctoral Science Foundation (2016M600201, 2018T110214, 2016M601304), National Natural Science Foundation of China (51805069), Natural Science Foundation of Liaoning Province, China (20170540154), and Aviation Science Foundation of China (2016ZF63007).

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