| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
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| Symposium
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Materials Science for Global Development -- Health, Energy, and Environment: An SMD Symposium in Honor of Wole Soboyejo
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| Presentation Title |
Imaging-based Fracture Analysis of Epoxy-Alumina Composite |
| Author(s) |
Yichun Tang, Kangning Su, Ruyi Man, Yuetong Hao, Yanran Wang, Michael C Hillman, Jiun-Shyan Chen, Jing Du |
| On-Site Speaker (Planned) |
Yichun Tang |
| Abstract Scope |
Particulate polymer-ceramic composites have wide applications in biomedical engineering and electronic devices. This work presents the results of an imaging-based study on the fracture behaviors of a typical polymer-ceramic composite material, epoxy-alumina. Three-point bending tests were performed on single-edge notched bend (SENB) specimens using mechanical tester coupled with micro X-ray computed tomography (micro-CT). The micro-CT images revealed various crack paths and the several toughening mechanisms. Using digital volume correlation (DVC), 3D-full field strain field inside the specimens was computed. Fracture mechanics theories were then applied to estimate the crack tip position and obtain the crack resistance curves. Results show that matrix-particle interfaces were the weakest link, because interface debonding was often observed. Guided by the insights, silane-coated epoxy-alumina specimens were fabricated, tested, and shown to improve the fracture toughness. This work established an imaging-based method to study the fracture behaviors and guide the design of robust particulate polymer-ceramic composites. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, |