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Research Article | Open Access

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

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
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Graphical Abstract

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

sinteringoscillatory pressure-assisted sinter forging (OPSF)densificationmechanical propertyceramic composites

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Journal of Advanced Ceramics
Volume 12 Issue 2,
February 2023
Pages 321-328
DOI: 10.26599/JAC.2023.9220685
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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Received: 26 July 2022
Revised: 26 September 2022
Accepted: 27 October 2022
Published: 10 January 2023
© The Author(s) 2022

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