| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Computation Assisted Materials Development for Improved Corrosion Resistance
|
| Presentation Title |
Hydrothermal Corrosion of Silicon Carbide |
| Author(s) |
Jianqi Xi, Dane Morgan, Izabela Szlufarska |
| On-Site Speaker (Planned) |
Jianqi Xi |
| Abstract Scope |
Silicon carbide (SiC) has been recognized for its potential as a cladding material in the advanced light water reactors. However, one of the remaining issues that can limit its application is the hydrothermal corrosion. In this talk, I will discuss our recent theoretical studies revealing corrosion mechanisms of SiC exposed to the hydrothermal environment. I will first discuss the elementary interfacial reactions driving corrosion, including a discovery of the unexpected hydrogen scission reaction that plays a key role in surface degradation. Our kinetic studies reveal that SiC is dissolved directly into the water without forming the silica layer, although the reactions are analogous to those observed during dissolution of silica. Secondly, I will discuss the surface orientation effect on SiC corrosion, which could provide strategies for the material design to suppress SiC corrosion. Finally, I will discuss the influence of irradiation-induced segregation on the hydrothermal corrosion of this material. |