Cold sintering process for 8 mol%Y₂O₃-stabilized ZrO₂ ceramics

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• 作者：Hanzheng Guo ; Thorsten J.M. Bayer ; Jing Guo ; Amanda Baker ; Clive A. Randall ; ^car4@psu.edu ; ^{randall@matse.psu.edu}
• 关键词：Sintering ; Cold sintering process ; Densification ; Yttria-stabilized zirconia ; Fine grain size
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：May 2017
• 年：2017
• 卷：37
• 期：5
• 页码：2303-2308
• 全文大小：1764 K
• 卷排序：37

文摘

In this communication, the cold sintering process was applied to benefit the green body compaction of 8 mol%Y2O3-stablized ZrO2 ceramics (8Y-YSZ). Compared to conventionally processed ceramics, an enhanced densification behavior was demonstrated in cold sintering related ones following a second step conventional sintering process. Dense ceramics up to ∼96% of theoretical density were achieved after sintering at 1200 °C. The resulted ceramics demonstrated a fine microstructure with a grain size ∼200 nm. A mechanical performance with a Vickers hardness of 13.6 GPa and a fracture toughness of 2.85 MPa m1/2 was also reported.