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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Advances in Ceramic Materials and Processing
Presentation Title Phase-boundary Assisted Flash Sintering of Al2O3-TiO2 Nanocomposites
Author(s) Shiyu Zhou, Haiyan Wang, Xinghang Zhang, R. Edwin García, David Estrella, Chao Shen, Huan Li, Alfredo Sanhuan, Danny Hermawan, Benson Kunhung Tsai, Chang Liu, Jialong Huang, Abhijeet Choudhury, Yang Chen
On-Site Speaker (Planned) Shiyu Zhou
Abstract Scope Al2O3 is inherently challenging to flash sinter due to its highly insulating nature. In contrast, TiO2 can be flash-sintered readily due to its better electrical and ionic conductivity at elevated temperatures than those of Al2O3. In this study, two-phase composites of Al2O3-TiO₂ with various molar ratios (i.e., 34 mol.% Al2O3/66 mol.% TiO2 and 20 mol.% Al2O3/80 mol.% TiO2) have been successfully processed by flash sintering and a systematic flash sintering map has been constructed to explore the relationship between electric field (ranging from 300 to 1,600 V/cm) and the flash sintering temperature in Al2O3-TiO₂ composites. The map clearly demonstrates that the flash sintering temperature of composites decreases with increasing electric field or higher TiO2 molar ratio. The potential mechanisms of phase boundary assisted flash sintering are discussed. This study confirms that the appropriate design of two-phase composites can prominently promote the flash sintering of insulating ceramic materials.
Proceedings Inclusion? Planned:
Keywords Ceramics, Characterization, Mechanical Properties

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