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Journal of Advanced Ceramics 2023, 12(2): 321-328 https://doi.org/10.26599/JAC.2023.9220685
Research Article | Open Access | Issue | Published: 10 January 2023

Oscillatory pressure-assisted sinter forging for preparation of high-performance SiC whisker reinforced Al2O3 composites

Show Author's Information Hongtian Hea,  Gang Shaoa( ),  Rui Zhaoa,  Hongyi Tiana,  Hailong Wanga,  Bingbing Fana,  Hongxia Lua,  Hongliang Xua,  Rui Zhanga,b,  Li-nan Anc( )
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
School of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China
School of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, China
Keywords:
mechanical property, sintering, ceramic composites, densification, oscillatory pressure-assisted sinter forging (OPSF)
Cite this article:
He H, Shao G, Zhao R, et al. Oscillatory pressure-assisted sinter forging for preparation of high-performance SiC whisker reinforced Al2O3 composites. Journal of Advanced Ceramics, 2023, 12(2): 321-328. https://doi.org/10.26599/JAC.2023.9220685
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Abstract Full text About this article

In this work, a novel process, oscillatory pressure-assisted sinter forging (OPSF), for the preparation of high-performance ceramic composites was reported. Compared with the samples made by conventional sinter forging (SF) and hot oscillatory pressing (HOP), the SiC whisker reinforced Al2O3 composites (SiCw–Al2O3) prepared by OPSF at the same temperature exhibited a higher density and significantly improved the mechanical properties. The improvements in densification and performance are attributed to simultaneous enhanced shear deformation at both macro- and micro-scales, resulting from the combination of die-free configuration and oscillatory pressure of OPSF. And the strength of grain boundary is greatly increased when the temperature reaches 1600 ℃ of OPSF, due to that the grain-boundary sliding became pronounced at higher temperatures. The current results shed light on a powerful technique for preparing ceramic composites, which is likely applicable to other systems.


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About this article

Oscillatory pressure-assisted sinter forging for preparation of high-performance SiC whisker reinforced Al2O3 composites

Show Author's information Hongtian Hea, Gang Shaoa( ), Rui Zhaoa, Hongyi Tiana, Hailong Wanga, Bingbing Fana, Hongxia Lua, Hongliang Xua, Rui Zhanga,b, Li-nan Anc( )
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
School of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China
School of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, China

Abstract

In this work, a novel process, oscillatory pressure-assisted sinter forging (OPSF), for the preparation of high-performance ceramic composites was reported. Compared with the samples made by conventional sinter forging (SF) and hot oscillatory pressing (HOP), the SiC whisker reinforced Al2O3 composites (SiCw–Al2O3) prepared by OPSF at the same temperature exhibited a higher density and significantly improved the mechanical properties. The improvements in densification and performance are attributed to simultaneous enhanced shear deformation at both macro- and micro-scales, resulting from the combination of die-free configuration and oscillatory pressure of OPSF. And the strength of grain boundary is greatly increased when the temperature reaches 1600 ℃ of OPSF, due to that the grain-boundary sliding became pronounced at higher temperatures. The current results shed light on a powerful technique for preparing ceramic composites, which is likely applicable to other systems.

Keywords: mechanical property, sintering, ceramic composites, densification, oscillatory pressure-assisted sinter forging (OPSF)

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Publication history
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Publication history

Received: 26 July 2022
Revised: 26 September 2022
Accepted: 27 October 2022
Published: 10 January 2023
Issue date: February 2023

Copyright

© The Author(s) 2022

Acknowledgements

The authors thank the financial support from the National Natural Science Foundation of China (Grant Nos. 52072344 and U1904180), Excellent Young Scientists Fund of Henan Province (Grant No. 202300410369), and Henan Province University Innovation Talents Support Program (Grant No. 21HASTIT001).

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