Microstructure Analysis of the ZrO2/Al2O3 Multi-Phase Ceramics

Zhi Wei Chen; Jin Ye Niu; Liu Feng; Dong Wu Liu; Xiao Bing Wei

doi:10.4028/www.scientific.net/KEM.544.191

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 544Microstructure Analysis of the ZrO2/Al2O3...

Microstructure Analysis of the ZrO₂/Al₂O₃ Multi-Phase Ceramics

Abstract:

Scanning electron microscopy (SEM) with X-ray mapping analysis was applied to systematically study the microstructure of ZrO₂/Al₂O₃ multi-phase (ZTA) ceramics prepared by firstly cold isostatic pressing of the as-prepared powders with different formulas and then normal pressure sintering of green bodies at different temperatures, which was proposed to illustrate the toughening mechanism of ZrO₂ phase as well as the effect of the microstructure on the fracture toughness of the ZTA ceramics. In addition, XRD analysis was carried out to characterize the phase composition and validate the mapping data from microanalysis. Results obtained in this study demonstrate that the amount of sintering aids added to decrease the sintering temperatures as well as the distribution of ZrO₂ particles in Al₂O₃ particles both play key roles in the microstructure and fracture toughness of ZTA ceramics, which indicates that microanalysis have important directive to the preparation of multi-phase ceramics with high performance.

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Key Engineering Materials (Volume 544)

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191-195

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.544.191

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Online since:

March 2013

Authors:

Zhi Wei Chen, Jin Ye Niu, Liu Feng, Dong Wu Liu, Xiao Bing Wei

Keywords:

Microstructure Analysis, X-Ray Mapping Analysis, ZrO₂/Al₂O₃ Multi-Phase Ceramics

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