| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
J-17: Reactive Molecular Dynamics Simulations Clarifying the Effect of Carbon Nanotube (CNT) Defects on Mechanical Properties of CNT/SiC Composites |
| Author(s) |
Yixin Su, Shogo Fukushima, Yuta Asano, Yusuke Ootani, Nobuki Ozawa, Momoji Kubo |
| On-Site Speaker (Planned) |
Yixin Su |
| Abstract Scope |
Carbon nanotubes (CNTs) are promising as reinforcing fibers in brittle SiC ceramic composites for exceptional strength and light weight. However, CNT defects have been reported to induce uncertainty in reinforcement. To address this problem, it is vital to reveal the underlying mechanisms of CNT defects affecting the composite mechanical properties. However, defects on CNT multi-walls influence nano-scale interfacial behavior in the composite, making the experimental clarification of mechanisms challenging. Therefore, in this study, the effect of CNT defects (vacancies) on the mechanical properties of CNT/SiC composites is studied by reactive molecular dynamics (MD) methods.
This presentation shows that CNT vacancies on inner CNT wall increase reinforcement while those on outer CNT wall reduce it. This is because that vacancies on inner CNT wall enhance crosslinking between walls, therefore stretching inner CNT more. Meanwhile, vacancies on outer CNT wall degrade CNT structure and strength. The details will be discussed during presentation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Composites, Surface Modification and Coatings |