Effect of the Al2O3 content on the microstructure evolution of flash-sintered Al2O3–8YSZ ceramics

Shu Yao; Yongsheng Liu; Dianguang Liu; Ke Zhao; Jinling Liu

doi:10.1016/j.oceram.2023.100468

Effect of the Al₂O₃ content on the microstructure evolution of flash-sintered Al₂O₃–8YSZ ceramics

Shu Yao, Yongsheng Liu, Dianguang Liu, Ke Zhao, Jinling Liu

School of Materials Sience and Engineering

Southwest Jiaotong University

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Systematic explorations of complex insulator–conductor composites may help in better comprehending the nature of flash sintering. In this study, flash sintering of alumina–8 mol% yttria stabilized zirconia (Al₂O₃–8YSZ) binary system with different mixing molar ratios was investigated. The results indicate that Al₂O₃ content significantly affects the flash-sintering behavior of Al₂O₃–8YSZ ceramics. The onset temperature of flash sintering increased with the increase in the Al₂O₃ content under 900 V cm⁻¹. For the Al₂O₃ content above 20 mol%, Al₂O₃–8YSZ multiphase ceramics with eutectic morphology could be obtained at 800 °C-700 V⋅cm⁻¹-120 s. Eutectic structures with different morphologies were obtained by adjusting the content of Al₂O₃. Formation of the eutectic structures is related to the Joule heating and defects introduced by the electric field. Flash sintering is a promising and novel sintering technology for the rapid fabrication of high-performance oxide eutectic ceramics.

Original language	English
Article number	100468
Journal	Open Ceramics
Volume	16
DOIs	https://doi.org/10.1016/j.oceram.2023.100468
State	Published - Dec 2023

Keywords

Composites
Eutectic structure
Flash sintering

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10.1016/j.oceram.2023.100468

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title = "Effect of the Al2O3 content on the microstructure evolution of flash-sintered Al2O3–8YSZ ceramics",

abstract = "Systematic explorations of complex insulator–conductor composites may help in better comprehending the nature of flash sintering. In this study, flash sintering of alumina–8 mol% yttria stabilized zirconia (Al2O3–8YSZ) binary system with different mixing molar ratios was investigated. The results indicate that Al2O3 content significantly affects the flash-sintering behavior of Al2O3–8YSZ ceramics. The onset temperature of flash sintering increased with the increase in the Al2O3 content under 900 V cm−1. For the Al2O3 content above 20 mol%, Al2O3–8YSZ multiphase ceramics with eutectic morphology could be obtained at 800 °C-700 V⋅cm−1-120 s. Eutectic structures with different morphologies were obtained by adjusting the content of Al2O3. Formation of the eutectic structures is related to the Joule heating and defects introduced by the electric field. Flash sintering is a promising and novel sintering technology for the rapid fabrication of high-performance oxide eutectic ceramics.",

keywords = "Composites, Eutectic structure, Flash sintering",

author = "Shu Yao and Yongsheng Liu and Dianguang Liu and Ke Zhao and Jinling Liu",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors",

year = "2023",

month = dec,

doi = "10.1016/j.oceram.2023.100468",

language = "英语",

volume = "16",

journal = "Open Ceramics",

issn = "2666-5395",

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T1 - Effect of the Al2O3 content on the microstructure evolution of flash-sintered Al2O3–8YSZ ceramics

AU - Yao, Shu

AU - Liu, Yongsheng

AU - Liu, Dianguang

AU - Zhao, Ke

AU - Liu, Jinling

PY - 2023/12

Y1 - 2023/12

N2 - Systematic explorations of complex insulator–conductor composites may help in better comprehending the nature of flash sintering. In this study, flash sintering of alumina–8 mol% yttria stabilized zirconia (Al2O3–8YSZ) binary system with different mixing molar ratios was investigated. The results indicate that Al2O3 content significantly affects the flash-sintering behavior of Al2O3–8YSZ ceramics. The onset temperature of flash sintering increased with the increase in the Al2O3 content under 900 V cm−1. For the Al2O3 content above 20 mol%, Al2O3–8YSZ multiphase ceramics with eutectic morphology could be obtained at 800 °C-700 V⋅cm−1-120 s. Eutectic structures with different morphologies were obtained by adjusting the content of Al2O3. Formation of the eutectic structures is related to the Joule heating and defects introduced by the electric field. Flash sintering is a promising and novel sintering technology for the rapid fabrication of high-performance oxide eutectic ceramics.

AB - Systematic explorations of complex insulator–conductor composites may help in better comprehending the nature of flash sintering. In this study, flash sintering of alumina–8 mol% yttria stabilized zirconia (Al2O3–8YSZ) binary system with different mixing molar ratios was investigated. The results indicate that Al2O3 content significantly affects the flash-sintering behavior of Al2O3–8YSZ ceramics. The onset temperature of flash sintering increased with the increase in the Al2O3 content under 900 V cm−1. For the Al2O3 content above 20 mol%, Al2O3–8YSZ multiphase ceramics with eutectic morphology could be obtained at 800 °C-700 V⋅cm−1-120 s. Eutectic structures with different morphologies were obtained by adjusting the content of Al2O3. Formation of the eutectic structures is related to the Joule heating and defects introduced by the electric field. Flash sintering is a promising and novel sintering technology for the rapid fabrication of high-performance oxide eutectic ceramics.

KW - Composites

KW - Eutectic structure

KW - Flash sintering

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Effect of the Al₂O₃ content on the microstructure evolution of flash-sintered Al₂O₃–8YSZ ceramics

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