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Alumina whisker reinforced zirconia ceramic composite was prepared by both hot oscillatory pressing (HOP) and conventional hot pressing (HP). The results show that compared with HP, HOP can significantly increase the final density and densification rate of the material. Analysis of densification kinetics reveals that the predominant densification mechanism transits from grain boundary sliding in the beginning to the diffusion in the later stage. The main effect of the oscillating pressure is to increase the densification rate in the process of grain boundary sliding. The current study suggests that HOP is a promising technique for densifying whisker reinforced ceramics.


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Sintering behavior of alumina whisker reinforced zirconia ceramics in hot oscillatory pressing

Show Author's information Hongtian HEaRui ZHAOaHongyi TIANaGang SHAOa( )Hailong WANGaBingbing FANaHongxia LUaHongliang XUaRui ZHANGa,bLi-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

Alumina whisker reinforced zirconia ceramic composite was prepared by both hot oscillatory pressing (HOP) and conventional hot pressing (HP). The results show that compared with HP, HOP can significantly increase the final density and densification rate of the material. Analysis of densification kinetics reveals that the predominant densification mechanism transits from grain boundary sliding in the beginning to the diffusion in the later stage. The main effect of the oscillating pressure is to increase the densification rate in the process of grain boundary sliding. The current study suggests that HOP is a promising technique for densifying whisker reinforced ceramics.

Keywords:

hot oscillatory pressing (HOP), densification behavior, grain boundary sliding, whisker reinforced ceramic composite
Received: 30 October 2021 Revised: 25 February 2022 Accepted: 27 February 2022 Published: 13 May 2022 Issue date: June 2022
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Publication history
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Publication history

Received: 30 October 2021
Revised: 25 February 2022
Accepted: 27 February 2022
Published: 13 May 2022
Issue date: June 2022

Copyright

© The Author(s) 2022.

Acknowledgements

We 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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