About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
A Novel Multi-Scale Characterization Approach for the Development of Advanced Nanocomposite Ceramics with Improved Toughness |
Author(s) |
Edoardo Rossi, Marco Sebastiani, Bartolomeo Coppola, Paola Palmero, Laura Montanaro |
On-Site Speaker (Planned) |
Edoardo Rossi |
Abstract Scope |
Developing ceramic nanocomposites with superior strength and toughness requires understanding toughening mechanisms at multiple scales. This research employs a comprehensive multi-scale mechanical characterization methodology to explore the relationship between microstructure and crack propagation in CeO2-stabilized zirconia ceramics, 3D-printed and isostatically pressed. The study uses single-phase samples with varying cerium oxide content. Micro-pillars of different diameters were created using Focused Ion Beam milling and tested with various nanoindentation tip geometries to measure crack propagation resistance through pillar-splitting. Raman spectroscopy detected early phase transformations caused by gallium ion damage and transformation volumes at the crack tip. Toughness improvements were notably size-dependent, increasing from 2.5 to 4 MPa√m as the pillar diameter increased from 7 µm to 35 µm and ceria content increased. The KIc versus indentation elastoplastic energy graph is pivotal, providing insight into intrinsic fracture toughness and the additional toughness imparted by phase transformation, secondary phases, or crack deflection mechanisms. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Characterization, Phase Transformations |