About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Fundamental Science of Microstructural Evolution and Phase Transformations: An MPMD/FMD/SMD Symposium in Honor of Peter Voorhees
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| Presentation Title |
Shear- and Diffusion-Induced Transformation for Toughening and Work Hardening in Ceramics Composites |
| Author(s) |
Huan Li, Chao Shen, Christian Bechteler, Zhongxia Shang, Xuanyu Sheng, Changxin Han, Shiyu Zhou, Chang Liu, Xinghang Zhang, Haiyan Wang |
| On-Site Speaker (Planned) |
Huan Li |
| Abstract Scope |
The inherent brittleness of ceramics has long constrained their usage in extreme environments, despite their exceptional strength and high-temperature thermal stability. Phase transformation toughening in 3% Yttria Stabilized Zirconia (3YSZ) has been widely used to improve plasticity, however such mechanism is often not operational beyond 400oC. Here, we investigated the deformation mechanism of YSZ-Zr (O,N) composite, where the non-equilibrium Zr (O,N) phase experienced substantial phase transformation under shear stress and diffusion at elevated temperatures. The phase transformation in the Zr (O,N) phase is facilitated by the abundant stacking faults, twin boundaries and diffusion. The composite displays a remarkable combination of ductility and strength, surpassing conventional transformation-toughened ceramics. This transformation mechanism provides a fresh perspective to enable plasticity and work hardening in ceramics via partial dislocation- and diffusion- dominated deformation mechanisms, enriching the capabilities to design next-generation structural ceramics resilient to thermomechanical extremes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Phase Transformations, High-Temperature Materials |