Journal
JOURNAL OF ADVANCED CERAMICS
Volume 11, Issue 6, Pages 893-900Publisher
SPRINGER
DOI: 10.1007/s40145-022-0583-5
Keywords
hot oscillatory pressing (HOP); densification behavior; grain boundary sliding; whisker reinforced ceramic composite
Categories
Funding
- National Natural Science Foundation of China [52072344, U1904180]
- Excellent Young Scientists Fund of Henan Province [202300410369]
- Henan Province University Innovation Talents Support Program [21HASTIT001]
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The alumina whisker reinforced zirconia ceramic composite was prepared using both hot oscillatory pressing (HOP) and conventional hot pressing (HP) methods. The study found that HOP can significantly increase the final density and densification rate compared to HP. Analysis of densification kinetics showed that the main densification mechanism transitioned from grain boundary sliding to diffusion during the process. The oscillating pressure mainly increased the densification rate during grain boundary sliding. The current study suggests that HOP is a promising technique for densifying whisker reinforced ceramics.
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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