About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
2026 Graduate Student Poster Contest
|
| Presentation Title |
SPG-13: Non-Crystalline Formation from the Oxidation of Ceramics Under Extreme Conditions |
| Author(s) |
Sarah Yvette Loucks, Collin Wilkinson, Scott Misture |
| On-Site Speaker (Planned) |
Sarah Yvette Loucks |
| Abstract Scope |
Silicon Carbide (SiC) oxidizes when exposed to atmosphere under extreme conditions, forming a non-crystalline layer at vulnerable interfaces such as surfaces and grain boundaries. This defect layer acts as a weak point which will decrease the mechanical performance of SiC due to defects and stress, which leads to fracturing furthering the oxidation mobility. This layer is difficult to experimentally characterize due to the extreme temperature and the microscopic layer driving the oxidation, motivating the need for advanced simulations. In this work we leverage machine learning potentials to elucidate the charge mobility of the surface and the associated change in bonding. This information is used to facilitate an understanding of layer formation and affiliated mechanical detriments. Lastly, the challenges around modeling the mixed ionic/covalent system will be discussed. |